Over 40% of American adults struggle with obesity today, making weight loss and fitness top priorities for almost half the population. But the older we get, the harder it can become to eradicate stubborn belly fat and love handles, even with regular exercise and a healthy diet.
Fat burners are among the most popular weight loss supplements for both men and women. These products feature thermogenic compounds that help to increase metabolism, burning fat for energy. Nighttime fat burners take this process to the next level by helping your body process and burn fat while you sleep.
Sound too good to be true? For some products, it is. But others are effective. We've tested some of the top-selling nighttime fat burners on the market, and in this guide, we'll look at five products that effectively boost metabolism, promote sleep, and curb cravings.
If you're in a rush and don't have time to read our complete guide, check out our summary of recommendations below.
Phen24's night time fat burner helps your body keep working toward shedding pounds without disrupting your sleep.
With daytime and stimulant-free nighttime formulas that work together, Phen24 covers you 24 hours a day with very effective, vegan-friendly formulas. Enjoy free shipping and a 60-day money-back guarantee.
We considered four primary evaluation criteria to evaluate our top choices in nighttime fat burners: quality, cost, safety, and ingredient transparency. Understanding how our top picks performed in these categories can help you decide which product is best for you.
We kept quality and effectiveness in mind when evaluating nighttime fat burners because if a product doesn't work, there's little point in purchasing it. Phen24 stood out as the clear winner in this regard, as its supplements worked exceptionally well.
Wolfson Brands (UK) Limited is a famous and highly trusted weight loss supplement manufacturer that produces Phen24 and PhenQ, both of which shine in the thermogenic market.
While Phen24 is the most expensive option among our choices for nighttime fat burners, it's essential to keep in mind that you're getting double what the other products offer. Phen24 is a dual product containing two bottles of thermogenic supplements – one for daytime use and one for nighttime. And this 24-hour approach is likely what makes Phen24 the most effective product in this guide.
Phen24's daytime capsules contain caffeine and other stimulants that effectively boost metabolism throughout the day, giving you added energy for more efficient and productive workouts. Phen24 Night provides appetite suppression with gentle thermogenics and natural sleep aids, offering you a peaceful night's rest.
Phen24 is vegan-friendly and comprises clean harvested ingredients that have been clinically proven to aid weight loss. Lastly, Phen24 provides a 60-day money-back guarantee and free worldwide shipping on all orders. If you're dissatisfied with the product, simply contact customer service to arrange a refund.
Winner: Nite Burn
Cost is an essential factor to consider when choosing a nighttime fat burner or any dietary supplement. Most of the products in this guide are reasonably priced, but BPI Sports Nite Burn is by far the most cost-effective choice among the bunch.
Nite Burn is widely available from online and brick-and-mortar retailers, allowing you to cut shipping costs from the equation. And you'll likely want to do so because we found BPI Sports shipping costs to be exorbitant, almost doubling the price of our single-product order.
Winner: Lean PM
Understanding the safety of anything we put into our bodies is critical. When considering safety among nighttime fat burners, we considered the following factors:
Some thermogenic supplements on the market contain ingredients that have demonstrated significant risks for heart and liver health, such as:
None of the products in this guide contain these ingredients, but we recommend avoiding any products that do.
For safety, we chose Lean PM as our winner based on its high-quality, research-backed ingredients and the fact that all products from Jacked Factory, including Lean PM, are manufactured in the USA in a GMP-certified facility. Lean PM also offers a melatonin-free version of its supplement for those with melatonin sensitivity.
Winner: T6 Star6urn-PM
In the dietary supplements market, you'll find a lot of proprietary blends. Unfortunately, proprietary blends allow manufacturers to give scant details on each product's ingredient amounts, so you never really know if you're getting a clinically effective dosage.
T6 Star6urn-PM is a standout product for its ingredient transparency. While it does contain two propriety ingredients, it goes far beyond its competitors to lay out exactly how much of each component you're getting. This goes a long way toward knowing how effective the product really is.
The chart below shows how our top recommendations compare in terms of cost, transparency, ingredients, safety, and customer assurance. Your product choice will depend upon your lifestyle, budget, and dietary needs.
These price comparisons are based on single purchases of each product and do not account for subscription plans or bulk purchases, which can often earn significant savings.
If weight loss is your ultimate goal, nighttime fat burners are an effective tool to incorporate into your fitness regimen. They won't make you magically shed pounds on their own. But taken in conjunction with a healthy, low-calorie diet and exercise, they can help you drop some weight. Many ingredients in these supplements aid those necessary lifestyle changes by suppressing appetite and giving you more energy for workouts.
These supplements are appropriate for healthy men and women, 18 and over, with no outstanding medical conditions. Many of these products include natural sleep aids like melatonin, so they are helpful for those with issues like trouble falling asleep or staying asleep throughout the night.
And lastly, nighttime fat burners often complement daytime fat burners, like the dual-supplement Phen24. The calming and sleep-inducing effects of these PM formulas counterbalance any issues with sleeplessness that you may encounter with daytime thermogenics, including caffeine and other stimulants.
If you have a medical condition, take any ongoing medications, or are pregnant or nursing, you should consult with your physician before beginning any new dietary supplement. Many ingredients in these products may interfere with other drugs, and virtually all fat burners are inappropriate for pregnant or lactating individuals.
If you have food allergies, you should discuss any new supplement with your doctor or dietician and pay close attention to ingredient labels. Thermogenic supplements are inappropriate for children.
Thermogenic supplements contain a broad spectrum of ingredients, but all share the same goal: to escalate the body's ability to burn calories by raising metabolism. Daytime supplements often contain caffeine and other research-backed stimulants that effectively boost energy and metabolism.
Nighttime fat burners take a different approach. They provide gentler compounds that escalate fat burning while avoiding stimulants, instead offering natural sleep aids and adaptogens to balance mood and provide a good night's rest.
Many supplements also focus on appetite suppression, offering ingredients like glucomannan and other cravings-curbing botanicals to help you avoid late-night snack sessions. Below, we'll look at some common compounds in nighttime fat burners and how they may help you shed pounds.
Daytime and pre-workout fat burners typically contain vastly different thermogenic elements than those designed for nighttime. Daytime formulas are generally stimulant-based, and while they are effective, they're not conducive to a good night's rest. The supplements in this guide are largely caffeine- and stimulant-free.
The most frequently used ingredients can be sorted into three categories. Not all products contain all three of these elements, but most of our top choices do. They include:
Below, we’ll investigate some of these common ingredients.
White kidney beans are alpha-amylase and glucosidase inhibitors that block carbohydrates from turning into glucose, stopping blood sugar spikes after eating. They have demonstrated several health benefits in clinical trials, including:
In a 12-week, randomized, double-blind trial, subjects consuming 1,000-3,000mg of white kidney bean extract daily showed a significant weight reduction compared to a placebo control group.
Green coffee extract (GCE) may seem like it doesn't belong in a nighttime supplement, but green coffee contains only 10% of the caffeine in roasted and brewed coffee.
Scientists have conducted studies for years on the efficacy of green coffee extract as an obesity treatment based on evidence of its thermogenic effects. In a 2010 meta-analysis of randomized clinical trials, researchers concluded that GCE intake could promote weight loss. They note, however, that more rigorous trials are needed to assess its efficacy as a weight-loss supplement.
More recently, this 2020 meta-analysis concluded that GCE supplementation improved fasting blood glucose, serum levels of insulin, and total cholesterol.
Like green coffee bean extract, green tea extract (GTE) can contain trace levels of caffeine. When used in a nighttime supplement, these levels are likely diminished from the way it’s processed in manufacturing.
GTE appears in many weight loss supplements based on evidence that it can speed up metabolism and enhance athletic performance. In a 2013 meta-analysis of scientific studies, researchers found that GTE demonstrated abilities to increase fat oxidation, but with inconsistent results.
A 2018 randomized, double-blind, placebo-controlled trial concluded that GTE effectively increased leptin levels and reduced low-density lipoprotein-cholesterol (LDL-C) in overweight and obese women after six weeks of treatment.
Raspberry ketones are natural phenolic compounds found in red raspberries, cranberries, and blackberries. They have a structure similar to those of capsaicin and synephrine, compounds shown to prevent obesity.
Raspberry ketones have found a home in many dietary supplements supporting weight loss in recent years. However, the most recent studies have demonstrated insufficient evidence of raspberry ketones' efficacy as an obesity treatment, with additional studies needed to determine their safety and potential.
Lemon balm is a perennial herb from the mint family used by herbalists for over 2,000 years. In an animal study published in 2020, researchers demonstrated that lemon balm extract could help inhibit obesity and improve insulin sensitivity and glucose metabolism in mice. Other studies have suggested this botanical may help treat indigestion and improve cognitive function for individuals with Alzheimer's disease.
Thiamin, also known as vitamin B1, is a natural occurring vitamin found in several foods like pork, fish, legumes, and vegetables. While its supplementation requires more extensive research to determine its potential in treating obesity, thiamin deficiency can occur in people suffering from:
Vitamin B1 might help to fill in a missing nutritional gap that — so far — seems to show up consistently in people seeking bariatric surgery for extreme obesity.
Vitamin D3 appears in several top nighttime fat burners on our list and other weight loss supplements based on its potential impacts on obesity. Vitamin D3 deficiency is an associated risk of obesity and risks of:
In a double-blind clinical trial in 2018, researchers showed that after six weeks of supplementing overweight and obese women with vitamin D3, those taking the supplement experienced decreased body mass index (BMI), total cholesterol, waist circumference, and high blood pressure.
Garcinia cambogia is another thermogenic compound that has proven to reduce abdominal fat in test subjects without any significant side effects or rebound effects. Also known in extract form as hydroxycitric acid (HCA), this botanical compound inhibits tumor cell growth and inflammation and provides several additional health benefits.
Glucomannan is a water-soluble fiber derived from the root of the konjac plant, native to East and Southeast Asia. This botanical serves as an appetite suppressant in many fat burners because when combined with water, it swells in the stomach, giving the sensation of fullness.
In a 2020 review and meta-analysis of studies on glucomannan as an obesity treatment, researchers concluded that test subjects exhibited a significant reduction in body weight after glucomannan consumption. However, further clinical trials are needed to figure out the best method of consumption and dosage.
Zinc is a natural nutrient in the body supporting immune and metabolic functions. Researchers have conducted several studies on the impacts of zinc on weight management, including this 2019 randomized, placebo-controlled, double-blind trial, which concluded that zinc supplementation has promising effects on appetite suppression, insulin resistance, and inflammation.
Mucuna pruriens (MP) is a legume native to Africa and tropical Asia with a long history of use in horticulture and herbalism. In a 2020 animal study investigating the effects of MP on obesity, researchers concluded that MP does have some impacts on appetite, weight loss, and neuroinflammation, but further trials need to be developed to test its metabolic effects, particularly in humans.
Melatonin is one of the most common sleep aids in nighttime fat burners. This hormone is naturally produced in the brain in response to darkness to make us tired. Melatonin has demonstrated the ability to improve issues like insomnia and jet lag in multiple studies and this 2014 review on its use on military populations. However, further studies are needed to determine its effects on sleep initiation and efficacy.
L-theanine is an amino acid derived from green and black teas and certain mushrooms. It finds its way into many dietary supplements based on its ability to reduce cortisol levels, resulting in increased relaxation, stress relief, and lowered blood pressure.
Nighttime fat burners are at a disadvantage because their name implies they're some magic pill that will melt away fat while you sleep. This is not the case. Whether daytime or nighttime focused, thermogenic supplements help raise the body's metabolism and encourage the body to burn fat for energy.
However, you still have to create a calorie deficit for them to be effective, meaning that you're eating fewer calories than you're expending. For this reason, most fat burners include appetite suppressing ingredients to curb cravings and help you maintain a low-calorie diet.
The most significant effects that you'll experience when taking a nighttime fat burner will be:
You will lose weight if you make the most of these effects by using that added daytime energy to commit to a regular fitness routine and the appetite suppression to maintain a healthy diet. Ultimately, nighttime fat burners are another tool in your arsenal to help you make significant lifestyle changes that will help you become happier, healthier, and lighter.
Thermogenic supplements, including nighttime fat burners, are safe for healthy adults and have few severe side effects. Many of the more extreme side effects come with daytime thermogenics, which often rely heavily on caffeine and other stimulants.
However, it's essential to remember that the FDA regulates no dietary supplements. Consumers should be responsible for their health by researching a product's ingredients, manufacturing methods, and potential side effects before they commit to adding it to a daily regimen.
Below are several factors to consider when choosing a nighttime fat burner. Taking each of these factors into account will help you decide whether these supplements are safe for your body’s needs.
If you suffer from food allergies, you're likely used to reading ingredient labels carefully. The same should apply to dietary supplements. Some of these products may contain natural or synthetic compounds that people are sensitive to, such as hops, glucomannan, kidney beans, raspberry ketones, saffron, etc.
Another critical factor to keep in mind is your sensitivity to sleep aids contained in PM fat burners. If you've had bad experiences with natural sleep aids like melatonin, you'll want to avoid products containing this common ingredient.
Diet pills of any kind carry a high risk of abuse for individuals with disordered eating or a history of eating disorders or addiction. While the products featured in this guide are not prescription medications and are non-habit-forming, overuse can still lead to significant health issues. We recommend sticking to the manufacturers' recommendations for dosage and staying far away if you’re at a high risk for overuse or abuse.
Caffeine and stimulants are common ingredients in daytime fat burners, but they do sometimes occur in nighttime formulas as well. Our product overviews below show that many of these supplements boast of being caffeine- and stimulant-free. Yet, they contain green coffee bean or green tea extracts, which contain various amounts of caffeine depending on how they’re processed.
If you are sensitive to caffeine, your best bet may be to opt for a product without these components. In our experience, however, we did not find any of these products to cause significant sleep deprivation.
If you suffer from a chronic medical condition or take any ongoing medication(s), you should always consult with your doctor before beginning any new dietary supplement. Some ingredients in thermogenic supplements that may cause drug interactions or serious health risks include:
While these ingredients are not present in any of our top choices, you'll still want to ensure that any components listed will not interact with your condition or medications. We do not recommend taking any fat-burning supplement while pregnant or nursing.
Good manufacturing processes ensure the product you purchase is free of heavy metals, hazardous chemicals, pesticides, or other dangers. We recommend sticking to products manufactured in the US or under EU safety guidelines.
Two of our top choices for nighttime fat burners provide customer satisfaction guarantees, although you may obtain a refund from other companies depending on your purchase method. Ordering directly through manufacturer websites gives you more opportunities for refunds if you are dissatisfied with a product.
Best overall and Best for appetite suppression
Phen24 is a two-part weight loss supplement that includes a daytime and a nighttime fat burner for a 24-hour metabolism boost. While its daytime supplement provides caffeine and other stimulants to keep you going throughout the day, its nighttime supplement focuses on appetite suppression, cortisol reduction, and components that provide improved mood, stress relief, and better sleep. Phen24 is not gender-specific, making it appropriate for adult use.
Phen24 comes in two bottles sold together. The daytime supplement contains 30 capsules, with one taken each morning. Phen24 Night includes 60 capsules. You'll take two 15 minutes before your evening meal with 1-2 glasses of water. Below, we'll briefly look at the ingredients in each formula.
Zinc (15mg), manganese (2mg), copper (1mg), iodine (150mcg), caffeine (150mg), guarana extract (100mg), L-Phenylalanine (70mg), cayenne powder (20mg)
Ascorbic acid (80mg), calcium D-pantothenate (10mg), pyridoxine HCl (5mg), thiamine HCl (4mg), chromium (120mcg), D-biotin (120 mcg), molybdenum (100mcg), glucomannan (1000mg), Griffonia extract (52mg), choline bitartrate (40mg), green tea extract (40mg), hop extract (25mg)
When used in conjunction, Phen24 Day and Phen24 Night provide the following benefits:
You can only purchase Phen24 products from the company website. While Phen24 does not provide a subscription savings plan, buying in bulk earns significant savings. If you buy a two-month supply, you'll receive the third month free. If you purchase a three-month supply, you'll receive two additional months free. Additionally, Phen24 provides free worldwide shipping on all orders. In the pricing chart below, we've detailed the cost for one-, three-, and five-month supplies:
Runner-up overall and Best for athletes
Jacked Factory, the manufacturer of Lean PM, is a well-established company offering several top-selling weight-loss and muscle-building supplements, including Burn-XT and Nitrosurge. Lean PM is appropriate for all genders and provides nighttime appetite suppression while promoting deep and peaceful sleep. It contains no caffeine or other stimulants, and its scientifically backed ingredients effectively boost metabolism and promote better overall mood.
Lean PM's main sleep-producing component is melatonin, a hormone naturally produced in the brain in response to darkness that makes us sleepy. By taking melatonin supplements, we essentially trick our bodies into having the same sleep response, regardless of what time of day it is.
However, users should note that melatonin can interact with certain medications, including blood thinners and epilepsy treatments. The American Academy of Sleep's guidelines do not recommend its use by individuals with dementia. The good news is that Lean PM also offers a melatonin-free alternative for those with sensitivities or interactions. Ingredients in Lean PM include:
Lean PM Melatonin Free replaces melatonin with lemon balm and rutaecarpine, an alkaloid that in animal studies has shown to promote sleep and reduce systemic caffeine exposure.
Lean PM provides the following benefits:
You can purchase Lean PM in many big box stores, chain pharmacies, and nutrition shops. However, we found the best deals directly through the company website. Jacked Factory does not offer a subscription savings program, but purchasing in bulk earns significant savings, as seen in the chart below.
Jacked Factory does not provide free shipping. For most orders in the US, shipping costs are as follows:
RevBurn PM for Her combines five all-natural fat burners with three non-habit-forming sleep aids to provide deeper sleep, improved mood, and boosted metabolism. While RevLabs designed this supplement with women in mind, none of its ingredients are harmful to men.
Several ingredients in RevBurn PM for women are scientifically backed for their potential in treating obesity. One standout ingredient is raspberry ketones, which have demonstrated the ability to alter lipid metabolism and exert anti-obese actions in animal studies. Likewise, researchers have demonstrated vitamin D3’s potential in a double-blind clinical trial to reduce body mass index in obese women compared to a control group. However, the dosage administered was over four times the amount in a daily dosage of RevBurn PM for Her. Due to RevLabs’ use of proprietary blends, it is impossible to know if some ingredients are equivalent to minimum effective clinical dosages.
Although RevBurn PM for Her does not list specific ingredient amounts in its two proprietary blends, they contain the following:
L-Tryptophan, melatonin, and chamomile flower powder
Raspberry ketones, kidney bean, green coffee bean, saffron flower, and lemon balm
RevBurn PM for Her provides the following benefits:
RevBurn PM for Her is available from many brick-and-mortar stores and online retailers. However, purchasing directly from the RevLabs website earns up to 10% savings if you subscribe to the company newsletter. RevLabs does not offer significant discounts for buying in bulk and does not provide an automated delivery service. One 30-count bottle of RevBurn PM for Her costs $34.97, and each individual serving breaks down to $1.66.
RevLabs offers free shipping on orders over $75. Standard shipping starts at $4.95 per delivery order. RevLabs does not offer expedited shipping.
Best budget pick
BPI Sports is the manufacturer of Nite Burn and many popular supplements promoted by bodybuilders and athletes worldwide. Nite Burn stimulates thermogenesis while suppressing your appetite and promoting peaceful sleep with several scientifically backed ingredients, including melatonin and raspberry ketones.
Like many fat-burning supplements, Nite Burn employs a proprietary blend, meaning that it does not give out exact ingredient amounts. However, it does provide specifics on its vitamin D3 quantity, which is 300% of the daily value. Its complete ingredients include:
Ingredients in the Nighttime Weight Management Blend include:
Nite Burn offers users several benefits, including:
You can find Nite Burn via online retailers, brick-and-mortar stores, and the official company website. While BPI Sports does not offer subscription or bulk discounts, you can earn savings by joining the BPI Sports Partner Program and becoming a BPI Ambassador. Doing so provides:
One month’s worth of Nite Burn costs $23.80, or $0.79 per serving.
Shipping rates vary depending on the weight of your order and can be pricey. For our order of one bottle of Nite Burn, shipping was as follows:
Best for mood enhancement
Out of all the products on our list, we think this is the best option for men based on several ingredients that support men's sexual health. T6 Star6urn-PM is a product from Team Six (T6), which also manufactures several other supplements for weight loss and building muscle. It’s also the best supplement for mood enhancement based on its inclusion of several adaptogens. We also appreciate T6 Star6urn-PM's ingredient transparency, surpassing all other top picks.
While T6 Star6urn-PM contains two proprietary blends, it provides more details on its ingredient amounts than its competitors.
Two standout ingredients in T6 Star6urn-PM are the adaptogens ashwagandha and Mucuna pruriens. These botanicals have extensive use in Ayurvedic medicine and provide stress relief and relaxation. Both may also benefit men’s sexual health.
The main ingredients in T6 Star6urn-PM include:
Unlike our other top choices for nighttime fat burners, Team Six (T6) does not sell its products directly to customers. The company website instead directs you to make purchases from Amazon. You can also buy T6 Star6urn-PM from Walmart.
However, T6 does provide an application to become a member of its ambassador program on its website. The Team Six 6lite program offers different Brand Ambassador Program Levels based on the number of sales you bring in, much like Tupperware or LuLaRoe. Some of the benefits of this program include:
One bottle of T6 Star6urn-PM costs $34.99 from Amazon, which contains 25 servings (meaning it costs $1.40 per serving). T6 products all have free standard shipping.
Over the past two decades, Innerbody Research has helped tens of millions of readers make more informed decisions involving staying healthy and living healthier lifestyles.
We extensively test each health service or product we review. We try our best to give you, our readers, an unbiased exploration of at-home health options, free of marketing jargon or gimmicks. We evaluate products and services based on their adherence to quality, the latest medical evidence and health standards, and a simple question: would we buy the product or service ourselves if it weren’t part of our job, and would we recommend it to family and friends?
Additionally, like all health-related content on this website, this review was thoroughly vetted by one or more members of our Medical Review Board for accuracy.