Best Inositol Supplement

Inositol is best known for its role in polycystic ovary syndrome (PCOS), and for good reason. It’s one of the few supplements supported by human research suggesting it may help support insulin sensitivity, ovulatory function, and hormonal balance in people with the condition.1 2 3 As a result, many people first encounter inositol while searching for options to manage PCOS symptoms.

But PCOS isn’t the only context where inositol has been studied, nor is it the only reason people take it. Because insulin signaling affects both metabolic and reproductive function, researchers have also explored inositol’s use in areas like metabolic health, fertility, and pregnancy care.4

As interest has grown, so has the number of inositol supplements on the market. Some closely match the doses and forms used in clinical research, while others fall short. In this guide, we break down what the research actually supports, where inositol appears most useful, and which supplements best reflect the evidence.

If you’re short on time, you can start with our summary of recommendations below — or keep reading to see how we evaluated each option.

Over the past two decades, Innerbody Research has helped tens of millions of readers make informed decisions about their health and wellness.

Our team thoroughly evaluates every product and service we review — including the inositol supplements featured in this guide. We analyzed dozens of peer-reviewed studies, clinical trials, and expert reviews on inositol, examining how different forms and doses affect insulin signaling, metabolic health, PCOS-related outcomes, fertility, and pregnancy support.

Alongside this research, we evaluated the leading inositol supplements on the market, comparing their formulations, dosing strategies, ingredient quality, and transparency against what’s been used in human studies. We also purchased and tried the most promising products ourselves to better assess real-world factors like dosing practicality, tolerability, and overall user experience.

As with all health-related content on our site, this guide has been reviewed by members of our Medical Review Board for accuracy and balance, and it will be updated as new research and products emerge.

When we set out to identify the best inositol supplements, we focused on the same factors most people consider before adding a product to their routine:

• Effectiveness
• Safety
• Cost
• Convenience

These four considerations guided our evaluation.

In the sections that follow, we explain how each of our top inositol picks performed in these areas and where certain products stood out. All of the supplements we selected met a high standard overall; when we highlight an “advantage,” it reflects a specific strength rather than a shortcoming in the others.

Effectiveness

Advantage: Life Extension Inositol Caps

When we looked at effectiveness, we started with a simple question: does this supplement provide the form and amount of inositol that’s actually been studied in people?

Inositol isn’t a single compound. Several forms exist, but myo-inositol (MI) is the most common form in the human body and the one used in most clinical research.5 It plays an important role in insulin signaling and cellular communication, which is why it has been studied for metabolic health, PCOS, fertility, and pregnancy-related outcomes.4 6 7

Across human studies, myo-inositol is most often used in daily doses between 2,000mg and 4,000mg, typically split into two servings. Reviews and meta-analyses report improvements in insulin sensitivity, glucose regulation, and reproductive markers at these levels in specific populations.7 8 9

We gave Life Extension Inositol Caps the effectiveness advantage because it makes working within these research-backed ranges straightforward:

• Each capsule provides 1,000mg of pure MI
• It’s easy to adjust intake over time, based on individual needs
• There are no extra ingredients to complicate dosing

That flexibility matters. Some people do well starting lower, while others may benefit from gradually increasing their intake — and a simple, single-ingredient formula makes that much easier.

Some inositol supplements take a more targeted approach. For example, Wholesome Story’s Myo-Inositol & D-Chiro Inositol + Folate combines MI with D-chiro-inositol (DCI) in a 40:1 ratio, a balance that has been studied specifically in people with PCOS.10 It also includes folate, which is commonly paired with inositol in PCOS research.1

But for broad, evidence-aligned effectiveness — especially for general metabolic support or insulin sensitivity — a straightforward MI supplement at a clinically relevant dose remains the most versatile option, which is why Life Extension earns the edge here.

Safety

Advantage: Life Extension Inositol Caps

Inositol has a strong safety profile and has been studied at doses well above what you’ll find in most supplements. Across clinical trials — including studies using up to 4,000mg per day — adverse effects are generally mild and uncommon, with gastrointestinal discomfort reported most often.3 11

Because inositol is a naturally occurring compound found throughout the body, safety concerns tend to be less about the ingredient itself and more about formulation quality and unnecessary additions. For that reason, we paid close attention to both testing practices and ingredient simplicity.

Life Extension earns the safety edge here because its products are third-party tested for purity and potency, and its inositol formula is intentionally simple. It contains only MI, without added herbs, stimulants, or secondary active ingredients that could increase the risk of interactions or side effects. That simplicity also makes it easier to adjust dosing gradually, which can help minimize digestive discomfort for sensitive users.

Cost

Advantage: BulkSupplements Inositol Powder

BulkSupplements earns the cost advantage because its inositol powder combines a low base price with extremely high serving counts — an important factor for a supplement like inositol that’s typically taken in gram-level doses. In clinical studies, those doses are commonly delivered either as powders or as capsules, and neither format has consistently shown better results than the other.3

A 1-kilogram bag of BulkSupplements MI costs $31.97 as a one-time purchase. Even after adding the $9.95 shipping fee, that works out to roughly $0.08 per day at a 2g dose, or about $0.17 per day at 4g. Buying larger sizes lowers the per-day cost further, and orders over $59 ship free, which makes BulkSupplements especially appealing for long-term use.

Among capsule options, Life Extension Inositol Caps is the most economical. Each capsule provides 1,000mg of MI, and a bottle of 360 capsules costs $38.48 (plus $5.50 shipping). That puts a 2g daily dose at about $0.24 per day, with 4g closer to $0.49 per day — still significantly more than powder, but reasonable for those who prefer capsules.

Complex formulas with additional active ingredients change the picture. Wholesome Story’s Myo-Inositol & D-Chiro-Inositol + Folate costs about $1.00 per day, while Fairhaven Health’s OvaBoost comes in closer to $1.33 per day. At that point, you’re not just paying for inositol — you’re paying for the added ingredients and the specific formulation.

The takeaway is straightforward: BulkSupplements powder delivers the most inositol for the lowest cost. That price advantage becomes more pronounced at the gram-level doses commonly used in research. Capsule products cost more in exchange for convenience, and combination formulas cost more still because they include additional active ingredients beyond inositol.

Convenience

Advantage: Life Extension Inositol Caps

While inositol is generally easy to take, convenience can vary by form and formulation. Powders require measuring and mixing, while multi-ingredient blends can make titration more complicated, since increasing or lowering your dose affects several ingredients at once.

Life Extension Inositol Caps stands out for three practical reasons:

• Simple, flexible dosing: Each capsule provides 1,000mg of MI, making it easy to take 1g, 2g, or higher amounts without measuring powders or introducing additional ingredients. This flexibility is especially helpful for people easing into inositol or adjusting intake based on tolerance or goals.
• Subscription savings and easy reordering: Life Extension’s subscription option reduces the bottle price from $38.48 to about $35.55, saving roughly $3 per bottle, while allowing users to set delivery intervals that match their dosing schedule. This helps avoid both running out and over-ordering. Additionally, subscribing earns you free shipping on your purchase.
• Generous return policy: A one-year money-back guarantee provides ample time to assess whether inositol is helping you reach your goals.

For people who prefer not to take capsules, BulkSupplements Inositol Powder may be more convenient, but its return policy is more restrictive. Opened products may be eligible for only a partial refund, typically capped at the price of the smallest package size, which makes larger purchases riskier.

Taken together, Life Extension earns the edge on convenience for most users.

The chart below shows how our top recommended inositol brands compare in terms of cost, servings, composition, and other factors that may influence your purchase decision.

Inositol is a naturally occurring, sugar-like compound (often called a “sugar alcohol”) that your body uses to help build cell membranes and transmit signals inside cells.12 It’s present in virtually all living tissue, and you get it from both internal production and food sources (especially beans/legumes, whole grains, nuts, and some fruits). While you’ll sometimes see it labeled “vitamin B8,” inositol isn’t considered a true vitamin because the human body can synthesize it.13

The term inositol refers to a group of nine stereoisomers (same atoms, arranged differently).14 In supplements and clinical research, two forms show up most often:

• Myo-inositol (MI): the most abundant form in the body and diet, and the most commonly studied form in supplements.12
• D-chiro-inositol (DCI): a less abundant form that the body can produce from MI via an enzyme-driven conversion process; it’s also used in supplements, often combined with MI.15 16

This "multiple forms" point matters because MI and DCI don't appear to behave identically in all tissues, and many trials (especially in reproductive and metabolic contexts) specify the exact isomer used.17

What does inositol do in the body?

Inositol is best understood as a structural building block and a signaling helper:

After you take an inositol supplement — most commonly MI, sometimes combined with DCI — the compound is absorbed in the small intestine and enters the bloodstream. From there, it’s taken up by tissues throughout the body, where it can be incorporated into cell membranes or converted into inositol-derived signaling molecules.12 13

Unlike many nutrients that act primarily as cofactors or antioxidants, inositol’s effects are largely tied to cell signaling. Inositol-containing molecules form part of the phosphatidylinositol signaling system — a network that helps cells respond to hormones, including insulin, and regulate downstream metabolic and reproductive processes.15 18

Because these signaling pathways influence insulin sensitivity, glucose handling, ovarian function, and even neurotransmitter activity, researchers have explored inositol supplementation across several clinical contexts.7 Importantly, while mechanistic data are strong, human outcomes vary by population, dose, and form, and many findings remain modest or preliminary.17

The mechanisms most often discussed in the literature fall into a few overlapping categories.

Inositol supplements appear to work by supporting intracellular signaling rather than acting as a direct hormone or drug-like agent. In practical terms, this means inositol doesn’t “force” a response; it helps cells respond more appropriately to signals that are already present.

This helps explain both their appeal — and their limitations. In situations where signaling pathways are impaired, such as insulin resistance or certain reproductive conditions, inositol may help restore more normal cellular responses and produce measurable benefits in some people. Where those pathways are already functioning well, the effects tend to be small or absent.

Clinical studies on inositol have tested a wide range of daily doses, with most human research clustering around 2,000–4,000mg per day of MI, often divided into two doses. This range appears most consistently across studies examining insulin sensitivity, metabolic outcomes, and reproductive health, including PCOS and gestational diabetes research.7 12 13

Unlike vitamins or minerals with established recommended daily allowances (RDAs), there is no official RDA for inositol. Dosing guidance instead comes from clinical trial precedent. Across reviews and meta-analyses, benefits — when they appear — tend to emerge at gram-level intakes used in human studies, not at the tens or hundreds of milligrams sometimes seen in general supplements.12 15

When DCI is included, it’s usually provided in much smaller amounts, often alongside MI. Many PCOS-focused trials use a 40:1 ratio of MI to DCI, which mirrors the physiological balance observed in healthy ovarian tissue.1 39

At a practical level, inositol dosing can be grouped by how it’s been studied:

Across contexts, higher doses do not consistently produce stronger effects. Reviews note that most observed benefits occur within commonly studied ranges, while gastrointestinal side effects — such as bloating or loose stools — become more common as intake increases.12 13 43 44

For that reason, most evidence-based supplement protocols fall within the 2–4g per day range, which reflects the doses most often studied in humans and balances potential benefit with tolerability.7

Inositol supplements are generally considered safe and well-tolerated for most healthy adults. Across human studies and reviews, adverse effects are uncommon at typical supplemental intakes, and when side effects do occur, they are usually mild and gastrointestinal in nature.12 13 44

A safety-focused review published in European Review for Medical and Pharmacological Sciences summarized available clinical and non-clinical data on myo-inositol and reported that only very high intake (around 12g per day) was consistently associated with side effects — specifically mild gastrointestinal symptoms such as nausea, gas/flatulence, and diarrhea.44 The authors also noted that the severity of these effects did not increase with higher doses.

At the lower doses most often used in metabolic and reproductive research (typically 2–4g per day), inositol is described as well-tolerated across reviews, with gastrointestinal discomfort reported infrequently and primarily as intake increases toward the upper end of studied ranges.12 13

When side effects do occur, they are typically:

• Mild
• Dose-related
• Limited to the gastrointestinal tract

These effects appear more likely at higher intakes and are often manageable in practice by using lower doses or spreading intake across the day.12 13 44

However, certain groups may want to exercise additional caution.

Overall, inositol has a strong safety profile, especially when used within the 2–4g per day range most commonly studied in human trials.12 13

Inositol supplements are best suited for adults interested in supporting insulin signaling and metabolic health, especially in situations where impaired glucose handling may affect hormone balance, ovulatory function, or fertility. Its potential benefits stem from its role in intracellular signaling pathways that influence insulin sensitivity and ovarian function — mechanisms that underlie many of the outcomes studied in clinical research.7 12 15 17

Although inositol is often associated with PCOS, much of the research points to metabolic signaling as the common thread, with reproductive and fertility-related benefits often building on those effects. More specifically, the following groups are most likely to see benefit from consistent use:

Overall, inositol works best as a supportive tool, not a quick fix. Its effects tend to be most noticeable in people with underlying metabolic or signaling disruptions — such as insulin resistance or PCOS — and more subtle in those with normal metabolic and reproductive function.

Who are they not for?

Inositol is one of the more promising supplements in the hormone-and-metabolism space, but it isn’t a cure-all. The benefits seen in research are highly context-dependent, with the most consistent effects appearing in people with underlying insulin resistance or PCOS-related metabolic disruption. Even in these groups, reviews emphasize that results can vary.12

If any of the points below sound familiar, it may help to reset expectations before supplementing.

Inositol tends to make the most sense when the goal is supporting insulin signaling and related reproductive function over time — not when someone is expecting a fast, guaranteed, or dramatic change.

Best for general health

Founded in 1980 and headquartered in Fort Lauderdale, Florida, Life Extension is one of the most established supplement brands in the U.S. The company is known for transparent sourcing, clinically aligned formulations, and strong quality controls. All Life Extension products are manufactured in NSF-registered, GMP-compliant facilities and undergo independent third-party testing, with certificates of analysis available upon request.

Life Extension’s Inositol Caps use a single ingredient: myo-inositol (MI). This is the most abundant and biologically active form of inositol in the body, and the form most often used in human research. MI plays a central role in how cells communicate with one another — especially in pathways tied to insulin signaling and reproductive hormone function.1 2

Because of that biology, MI has been studied most extensively for:12

• Metabolic support, particularly insulin sensitivity
• Cell signaling, where it helps cells respond properly to hormonal signals
• Reproductive function, including ovarian signaling pathways

From an effectiveness standpoint, the single-ingredient approach here is a strength. Across human trials looking at metabolic health and reproductive outcomes, MI is overwhelmingly the form of inositol used, typically at daily intakes between 1 and 4 grams.12 13 The 1g capsule format makes it easy to start at a lower dose and increase gradually, which many people find more comfortable for long-term use.

If your goal is general health support — rather than a targeted PCOS protocol — MI alone is often enough. Its safety profile is well established in long-term human studies, where it has been consistently well tolerated with few reported side effects.5 6 44 That makes Life Extension Inositol Caps a practical, evidence-aligned option for everyday use.

Pricing, subscriptions, and shipping

A bottle of Life Extension Inositol Caps costs $38.48 and contains 360 capsules. One-time purchases under $50 incur a $5.50 shipping fee. Subscribing reduces the bottle price by 8% and removes shipping costs entirely. Subscription deliveries can be scheduled at any interval from 1 to 12 months, offering the most flexible delivery options among brands featured in this guide.

Here’s how the pricing breaks down:

Refunds and guarantees

Life Extension stands out for its 365-day money-back guarantee, which applies even to opened bottles. Customers can request a full refund at any point within one year of purchase, making this one of the lowest-risk options in the inositol category.

No other company featured in this guide offers a guarantee of comparable length. Wholesome Story is the closest competitor, but its money-back window is limited to 90 days — roughly one quarter of Life Extension’s coverage.

Best for PCOS

Wholesome Story is a women’s health–focused supplement company founded in 2016, with a product lineup centered on PCOS, fertility, and hormone-related support. That focus is clear in this formula. Rather than offering MI alone, Wholesome Story builds a PCOS-specific blend around how inositol signaling appears to function differently in people with PCOS.

In PCOS, research suggests that the balance between MI and D-chiro-inositol (DCI) can become disrupted, particularly at the ovarian level. Higher relative amounts of DCI may impair oocyte quality, even while supporting insulin signaling elsewhere in the body. This insight led researchers to explore a 40:1 MI:DCI ratio, which more closely reflects physiological conditions and aims to support both metabolic and ovarian signaling without overloading DCI.17 31

That rationale drives the structure of this formula. A full daily serving provides 2,000mg of MI paired with 50mg of DCI, preserving the 40:1 ratio most often used in PCOS studies. Clinical trials using this ratio have reported improvements in metabolic and endocrine markers, and it has been incorporated into research informing international PCOS guidelines — though outcomes vary.17 31

In addition to inositol, the blend includes:

One additional consideration is dosing flexibility. In PCOS research, MI is commonly studied at daily intakes between 2g and 4g, depending on the population and outcome measured.17 31 Wholesome Story’s standard serving delivers 2g, which aligns well with many clinical trials. The label also allows for two daily servings (4g total), placing intake at the higher end of the studied range.

Because this is a combination formula, increasing to two servings also doubles folate (to 1,000mcg) and vitamin D3 (to 2,000IU). Both amounts remain within established safety thresholds for most healthy adults.51 52 Still, it’s worth keeping in mind — especially for people who already supplement folate or vitamin D separately — that combination products offer less flexibility when adjusting servings.

Taken together, for someone seeking a streamlined, research-aligned PCOS option — rather than a general wellness inositol — Wholesome Story’s blend may be a strong fit.

Pricing, subscriptions, and shipping

Wholesome Story’s bottle costs $29.95 for 120 capsules (30 servings), since a full serving is four capsules. Subscribing reduces the price by 10% to $26.96. A larger bottle with 360 capsules costs $74.95, or $67.46 with a subscription.

Shipping is $5.50 unless your order exceeds $40, at which point shipping is free. Subscription deliveries can be scheduled every one, two, three, or four months.

One practical downside is that higher-dose use doesn’t align neatly with these intervals. If you take two servings per day, the 120-capsule bottle lasts just 15 days, and even the 360-capsule bottle lasts about 45 days, which can make timing subscriptions less convenient unless you plan ahead or reorder manually.

Refunds and guarantees

Wholesome Story offers a 90-day money-back guarantee on up to three bottles, full or empty, with customers responsible only for return shipping. That’s a strong policy for the supplement category and should give most people enough time to assess tolerance and potential symptom improvement related to PCOS.

The only company featured in this guide with a longer guarantee is Life Extension, which offers a 365-day satisfaction policy.

Best for female fertility and egg quality

Fairhaven Health is a fertility-specialist brand with a long-standing focus on supplements for people trying to conceive — both women and men. That focus is clear in OvaBoost, a fertility stack designed around egg quality, oxidative stress support, and IVF-style outcomes.

A full daily serving of OvaBoost (four capsules) provides the following active ingredients:

• Myo-inositol (MI): 2,000mg
• Alpha-lipoic acid (ALA): 150mg
• Vitamin E: 67mg
• Grape seed extract: 60mg
• Coenzyme Q10 (CoQ10): 30mg
• Melatonin: 2mg
• Folate (as L-methylfolate): 340mcg

At the center of the formula is MI (2,000mg per daily serving) — a dose that aligns with how inositol is commonly used in fertility research.53 Notably, Fairhaven pairs this core ingredient with melatonin and folate, a combination that has been studied in women undergoing IVF. Some trials suggest improvements in oocyte quality and select pregnancy-related outcomes in certain populations.54

In addition, the formula includes:

One practical consideration is dose flexibility. With a combination product like this, titration can get tricky. While many fertility- or PCOS-focused inositol protocols use 2g per day, some go up to 4g.53 OvaBoost’s label structure makes that less flexible, since increasing the inositol dose also increases melatonin, antioxidants, and folate simultaneously.

Melatonin is likely the limiting factor. While doubling the other ingredients would generally remain within reasonable ranges — and might even be beneficial for ALA or grape seed extract — increasing melatonin to 4mg per day may cause drowsiness in some users.63

That said, from an overall effectiveness standpoint, Fairhaven’s design makes sense if you’re looking for a single, once-daily formula that mirrors how many fertility studies are structured.

Pricing, subscriptions, and shipping

OvaBoost is sold as a bottle of 120 capsules (30 servings). Fairhaven offers a 10% discount through subscription, with delivery options every one, two, three, or four months. Free shipping applies to orders over $35; otherwise, shipping costs $4.95 — and unfortunately, a single bottle falls just $0.05 below that threshold.

The cost breaks down as follows:

At one serving per day, the bottle lasts 30 days, which aligns well with monthly replenishment. If you’re attempting to push closer to 4g per day by doubling servings, the bottle lasts just 15 days, making subscription timing and inventory management less convenient.

Refunds and guarantees

Fairhaven does not offer a money-back guarantee. Returns are limited to unopened products within 30 days, and preauthorization is required. This is the most restrictive return policy in the guide; brands like Life Extension and Wholesome Story offer satisfaction guarantees, and BulkSupplements may refund some opened products under certain conditions.

Best budget pick

BulkSupplements specializes in producing single-ingredient supplements at very low cost, and its Inositol Powder fits that model exactly. This product contains just one ingredient — MI — in a format that makes it easy to reach research-aligned doses without paying for capsules, coatings, or additional ingredients.

From an evidence standpoint, MI is the same form of inositol used in most metabolic, PCOS, fertility, and gestational diabetes studies — including trials that administered it as a powder dissolved in liquid.4 6 7 The powder format also offers maximum dosing flexibility, making it straightforward to adjust intake based on tolerance or target dose.

Where BulkSupplements clearly stands out is value. Inositol is typically taken in gram-level doses, and capsule-based products can become expensive when used long term. By offering inositol as a bulk powder in multiple sizes, BulkSupplements dramatically lowers the cost per serving — especially at the larger bag sizes.

Taste and mixability

BulkSupplements Inositol Powder is nearly neutral in taste. Our testers noticed only a faint sweetness or mild aftertaste, and it dissolves easily in water without grit or residue. There should be no problem taking it on a regular basis.

It can also be blended into smoothies or mixed with juice or other beverages, where it’s typically undetectable. However, despite its mild sweetness, inositol isn’t used as a sugar substitute like erythritol or xylitol. Its taste is very subtle, and it isn’t intended to sweeten foods or drinks.

Pricing, subscriptions, and shipping

BulkSupplements offers inositol powder in several bag sizes, ranging from 100g to 1 kilogram. Subscription purchases receive a 10% discount, and larger sizes offer a significantly lower cost per 2g serving.

Shipping is where BulkSupplements becomes less competitive. Orders under the free-shipping threshold incur a $9.95 shipping fee, which is the highest base shipping cost in this guide. Free shipping applies only once you cross the minimum order threshold of $59, which often requires combining items in a single order.

However, the product is also available through Amazon, where Prime shipping can help offset that cost.

Refunds and guarantees

BulkSupplements allows returns within 30 days, but its refund policy is more restrictive than most brands featured in this guide. Full refunds apply only to unopened products. Opened containers may be eligible for a partial refund, typically capped at the price of the smallest package size, which limits recourse on larger purchases. There is no formal satisfaction guarantee.

As a result, buyers take on more risk than they would with brands like Life Extension or Wholesome Story, which offer more consumer-friendly guarantees. That trade-off may be reasonable for value-focused shoppers or experienced users who already know they tolerate inositol well. For those prioritizing low cost per gram and dosing flexibility over a generous return policy, BulkSupplements remains a practical and economical choice.

Honorable mention for fertility support

Ritual’s Fertility Support is not one of our top recommendations in this guide, but it earns an honorable mention for people who want an all-in-one fertility powder built around ingredients that appear repeatedly in metabolic and reproductive research.

A single daily scoop provides:

• Myo-inositol (MI): 2,000mg
• N-acetylcysteine (NAC): 600mg
• Coenzyme Q10 (CoQ10): 100mg

From an evidence standpoint, MI is positioned to drive most of the expected effect in this formula. Its 2,000mg dose aligns with how inositol is typically used in human studies, while the remaining ingredients are included at supportive levels.12 13

Some fertility and PCOS studies use 4,000mg per day of MI, often divided into two doses.12 13 53 Reaching that level with Ritual Fertility Support would require doubling the serving size, which also doubles NAC (to 1,200mg) and CoQ10 (to 200mg). While the higher CoQ10 intake moves closer to the range used in many fertility and egg-quality studies, increasing NAC at the same time may raise the likelihood of gastrointestinal discomfort, which is the most commonly reported side effect of NAC at higher doses.13 44 55 68 69 Because the ingredients can’t be adjusted independently, this limits dosing flexibility.

Pricing, subscriptions, and shipping

Ritual Fertility Support costs $99 for a 60-serving tub. Subscribing reduces the price by 40% to $59.40, and subscriptions can be canceled at any time. All purchases ship free from Ritual’s website.

Here’s how the pricing breaks down:

Refunds and guarantees

Ritual offers a 30-day money-back guarantee, which provides a reasonable trial window to assess taste, routine fit, and tolerance. However, this guarantee is shorter than Wholesome Story’s 90-day return window and Life Extension’s 365-day satisfaction guarantee.

If you’re exploring supplementation but have constraints (e.g., cost, tolerance, or formulation preferences) — or if you simply want to stack smartly with inositol — here are some well-researched alternatives:

Diet

Inositol is widely present in foods, especially plant foods where it often appears in the form of phytic acid (IP6) — a major storage form in grains, legumes, nuts, and seeds. That means that if someone eats a diet rich in beans/lentils, whole grains, nuts, and seeds, they’re typically getting meaningful dietary exposure to inositol-related compounds.7 70 71 However, the forms and amounts obtained from food differ from the concentrated doses used in supplementation and clinical research.

Examples of inositol-rich foods include:

• Whole grains (especially bran-containing options)
• Beans and lentils
• Nuts and seeds
• Legumes and soy foods
• Organ meats (like chicken liver and beef liver)