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Kiierr Laser Cap Reviews: Effectiveness at an impressive price

Kiierr offers caps at about half the cost of others without sacrificing efficacy. We dive into the data to see if this is a way to save your hair and money.

Last Updated: Jan 2, 2023
Kiierr Review

Hair loss affects a large number of men and women, with more than half of men likely to experience some form of hair loss before turning 50. For such a widespread issue, solutions didn’t advance much farther than hairpieces and spray-on hair until the second half of the 20th century. That’s when developments like follicle transplants, Rogaine, and Propecia came along.

But as typical as many of these therapies are, they’re all prone to complications and side effects. Before minoxidil or finasteride hit the scene, researchers investigated the potential for specific wavelengths of light to ease pain. This research led to low-level laser therapy (LLLT), which is the basis for Kiierr laser caps.

Laser cap technology is consistently expensive, but so is a lifetime of prescription medication like finasteride. And with a lower side effect profile than finasteride and a more effortless application experience than minoxidil, LLLT offers a viable alternative to treat hair loss. Let’s look at what makes Kiierr stand out among a small sea of competitors.

Review Summary


  • Competitive pricing
  • 7-month growth guarantee
  • XL model available for large heads
  • More uses per charge than most others
  • Device is FDA-cleared
  • Laser caps are safe for men and women
  • Free 2-day shipping
  • Take $130 off by taking Kiierr’s quick Hair Loss Quiz
  • Take 15% OFF with code INNERBODY


  • Longer charge and session times than competitors
  • Site can be hard to navigate
  • Some Kiierr haircare ingredients need more testing

Bottom line

For many, Kiierr will be a perfect place to start laser treatment, as it presents such a lower financial risk than others. They provide effective laser caps for a significant discount compared to Capillus and HairMax. They do this while still offering 272 laser diodes with a 2-year warranty and a growth guarantee. In the trade, you end up with longer charge times for the battery and longer session times daily, which may make it more difficult for some to stick with their plan over the long haul.

Our Top Picks


Kiierr is an affordable and effective laser treatment for hair loss, with competitive pricing and a 7-month growth guarantee.

Laser caps from Kiierr are FDA approved and hold more uses per charge compared to other brands. Purchases are shipped within 2 days for free and covered by a 2-year warranty. Take 15% off with code: INNERBODY.

Kiierr 272 Premiere
Reviewed by Innerbody Research

with code: INNERBODY

Kiierr 148 Pro
Reviewed by Innerbody Research

with code: INNERBODY

Kiierr 272 Premiere MD
Reviewed by Innerbody Research

with code: INNERBODY

Why you should trust us

At Innerbody Research, we extensively test each health service we review, including Kiierr’s laser caps for hair loss. All told, our team has spent hundreds of hours testing and researching hair loss products and services, as well as your treatment alternatives, to provide an accurate, unbiased analysis of how the products and services compare, free of marketing jargon and gimmicks.

Over the past two decades, Innerbody Research has helped tens of millions of readers make more informed decisions to live healthier lifestyles. We evaluate the service based on 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.

What causes hair loss?

While there are several common causes for hair loss, the most common by far is androgenetic alopecia. Most people would recognize it by its common name: male pattern baldness. It’s also the same condition and clinical term for female pattern baldness. This condition results from an overabundance of dihydrotestosterone (DHT) at the scalp. The body creates DHT by converting testosterone with an enzyme called 5 alpha-reductase. Whether or not your body produces too much DHT is mostly a matter of genetics.

Other causes of hair loss include the following:

Telogen effluvium

Telogen effluvium is stress-related hair loss. The stress involved can be emotional, physical, psychological, or environmental, with triggers ranging from trauma to toxin exposure.

Alopecia areata

This is an immune system disorder in which your immune system attacks patches of hair follicles. More extreme versions of alopecia areata — called alopecia totalis and alopecia universalis — attack follicles on the entire scalp or body, respectively.

Chemotherapy-induced alopecia

This is the hair loss that often accompanies chemotherapy treatment for cancer. It’s usually temporary, with hair growing back after treatment is complete. Therapies like LLLT and minoxidil may speed up hair growth after treatment.

What is Kiierr and how does it work?

Kiierr is a company devoted to treating hair loss. Their primary tool in this fight is the laser cap, a device you wear on your head. It contains many laser diodes tuned to a specific wavelength and frequency. The treatment method is called low-level laser therapy, or LLLT.

Kiierr also has a small haircare product line that combines topical treatments with botanicals, vitamins, and minerals that perform well in hair loss studies. Many users find that employing such ancillary therapies in conjunction with LLLT increases the quality of their results.

What is LLLT?

LLLT utilizes concentrated light emissions tuned to a specific frequency and wavelength and applied to a targeted area of the body. In the case of hair loss treatments, this application area is the scalp. The red light you see coming from the laser caps is approximately 655 nanometers in wavelength, which multiple studies conclude is among the most effective wavelengths to treat hair loss.

LLLT’s exact mechanism of action is poorly understood, but the laser exposure likely causes an increase in blood flow to the scalp. That extra blood would deliver additional nutrients and oxygen to follicles, strengthening them. There is also evidence that LLLT can reset growth phases, causing your follicles to start a fresh round of growth with this increased oxygen and nutrient delivery, aiding the development of new hair strands.

How long does LLLT take to work?

LLLT regimens start showing results in a few months. They follow a similar timeline to minoxidil. You won’t see much of an improvement after only a few weeks, and you may even endure some shedding when your follicles reset their growth phases. But if you stay with it, you will likely see a cessation of hair loss and a return of growth.

Who should consider Kiierr?

Kiierr is an excellent option for anyone interested in laser hair loss treatments who can’t quite justify a $3,000 investment in the technology. And LLLT, in general, is a great option for anyone who has either tried medicines like finasteride and minoxidil to no avail or would rather avoid them and their potential side effects.

That said, if you’ve used minoxidil with some success, you might want to combine it with LLLT. Studies show that the results compound significantly when you put minoxidil and LLLT together. That can cause more hair to grow back in less time.

Kiierr laser caps

Kiierr offers three laser cap options, one of which is available in an XL size for heads whose circumferences exceed 23.5 inches. The available caps and their prices are as follows:

  • 148 Pro: $695, 148 laser diodes
  • 272 Premiere: $995, 272 diodes
  • 272 Premiere MD: $1,495, 272 laser diodes
  • 272 Premiere MD XL: $1,895, 272 laser diodes

Here’s a look at Kiierr’s laser caps and how they compare to some of the top competition:

  Cost Diode Count Treatment Time Treatment Frequency Battery Life Warranty Length
Kiierr 148 Pro $695 148 30 minutes Alternating days 5-7 sessions 2 years
Kiierr 272 Premiere $995 272 30 minutes Alternating days 5-7 sessions 2 years
Kiierr 272 Premiere MD $1,495 272 30 minutes Alternating days 8-10 sessions 2 years
Capillus Plus $1,999 202 6 minutes Daily 4-5 sessions 3 years
Capillus Pro $2,999 272 6 minutes Daily 4-5 sessions 3 years
HairMax PowerFlex Laser Cap 202 $1,699 202 15-30 minutes 3x/week 2-3 sessions 2 years
HairMax Powerflex Laser Cap 272 $1,899 272 15-30 minutes 3x/week 2-3 sessions 2 years
LaserCap HD $2,499 224 30 minutes Alternating days 4-5 sessions 3 years
LaserCap HD+ $2,995 304 30 minutes Alternating days 4-5 sessions 3 years

Refurbished models

Kiierr also offers refurbished caps as their stock allows. A refurbished Premier 272 sells for $799, marked down from $925 for a savings of $126. Refurbished caps do not come with a growth guarantee, and their warranty only lasts for one year. However, you can use your $130 hair loss evaluation coupon on a refurbished cap, bringing your cost down to $669.

Seven-month growth guarantee

Because it can take several months for laser therapy to achieve noticeable results, Kiierr offers one of the most extended growth guarantees in the business. You can use the laser cap for up to seven months, and if you aren’t satisfied, you can still return it.

You can only claim the guarantee if you registered your product when you received it and submitted a before photo to the company. You’ll have to provide them with a current picture to show that the cap didn’t work for you. Also, all returns include a $50 fee to cover shipping costs and a 25% deduction that Kiierr calls a convenience fee.

Haircare products and supplements

Kiierr offers several haircare products that they’ve designed for you to use in conjunction with your laser cap. Kiierr relies on some novel ingredients in their haircare products that you won’t see in many of the competition’s offerings. They show promise in testing but need more studies to recommend them wholeheartedly.

Here’s a quick look at Kiierr’s haircare lineup.

DHT Blocking Shampoo – $34.95

This shampoo utilizes a proprietary blend called Kapilarine, a combination of kigelia Africana, salvia, cinnamon, and Ginkgo biloba. There is some evidence that these ingredients can function well as DHT blockers.

DHT Conditioner for Hair Growth – $34.95

Kiierr’s conditioner boasts another set of specialized ingredients — Trichogen and DermaPep — that the company says can both improve hair strength and promote growth. Peppermint oil nourishes while providing a clean, fresh scent.

DHT Blocking Hair Growth Vitamins – $34.95

Sometimes you need to treat the inside to affect the outside, and this vitamin complex aims to do just that. It has vitamins and nutrients combined with well-studied botanicals like saw palmetto and nettle root that encourage healthy hair growth. It also has 300 mcg of biotin to benefit your hair, skin, and nails. Allergy warning: the vitamins contain bovine gelatin and may contain soy and shellfish.

Biotin Gummies for Hair Growth – $34.95

This supplement provides a lot more biotin than you’ll get from their multivitamin alone. A single serving provides 5,000 mcg of biotin. They have coconut oil in them, so you might want to look elsewhere if you have a tree nut allergy.

Collagen Gummies for Hair Growth — $34.95

These gummies provide your body with the building blocks it needs to produce new hair strands. There is also some evidence that collagen can slow the onset of gray hair and follicle damage that comes with age.

Dermal Restorative Hair Growth Cream — $89.95

One of Kiierr’s newest products, this cream uses 35 ingredients combined to moisturize your scalp while fighting against microbes, inflammation, and oxidation. The list includes aloe, squalene, and alpha-lipoic acid.

Omega 369 Fish Oil for Hair Growth — $34.95

Omega-3 fatty acids offer your body numerous health benefits — including hair health — and fish oil supplements are a great way to ensure you’re getting enough. The sustainably sourced oils in this supplement come from fish, flaxseed, and borage.

Dermaroller MAX Hair Growth Bundle $99.95

This bundle includes Kiierr’s Restorative Hair Growth Cream ($89.95) and the company’s dermaroller. Currently, this bundle is the only way to get a dermaroller from Kiierr’s website. It can help with the absorption of nutrients in the cream by stimulating blood flow to the scalp.

Laser Cap Carrying Case — $44.95

This case perfectly fits 148 Pro and 272 Premiere laser caps. It’s ventilated, so you don’t have to worry about moisture buildup if you need to pack it up immediately after use.

Payments, shipping, and warranty

Kiierr accepts all major credit cards, Venmo, and PayPal. They also provide free 2-day shipping on all their products.

Kiierr laser caps come with a 2-year warranty that covers all parts against manufacturer defects for two years from the date of purchase.

Are Kiierr laser caps safe?

Kiierr laser caps and LLLT, in general, are incredibly safe for use on the scalp. Mild side effects sometimes occur, including irritation or redness. You should avoid using any laser cap if you have undiagnosed lesions or any form of skin cancer on or around your scalp.

Because these products use lasers, they can cause significant eye damage. Some laser caps provide a safety feature that will prevent the lasers from firing if the cap doesn’t sense that it’s on your head. Kiierr laser caps lack this feature – possibly one of the tradeoffs of getting an effective laser cap for less money.

If you live in a house with young children who might not understand the danger lasers pose to their eyes, you should do all you can to keep the cap in a safe place that those children cannot access.

How Kiierr stacks up against the competition

Kiierr is far from the only game in town, though they do offer one of the best products in its price range that you’ll find. There are a few other players worth mentioning. These companies all offer caps with similar diode counts and feature sets, though you may find some of them to be significantly more expensive than Kiierr’s caps.

Here are two of our favorites in a nutshell:


Absolute top-of-the-line laser caps with great features and the shortest daily session times of any LLLT device in its class. They also happen to be among the most expensive, with their 272-diode cap costing around $3,000.


HairMax offers laser caps that are incredibly similar to those from Capillus but that provide slightly less battery capacity. They’re a nice compromise price-wise between Kiierr’s models and those chrome Capillus, but the differences between Kiierr and HairMax are relatively slight.

For a complete look at the entire laser cap field, check out our Guide to the Best Laser Caps for Hair Loss.

How we evaluate home health products and services

At Innerbody Research, we customize our evaluation criteria depending on the type and nature of the health-related service or product. For health products and services, we have five areas that we use for our evaluations, including:

Quality: How well does the company deliver its core service(s) to the customer? For testing services, does the company adhere to the latest and most advanced testing technologies and achieve a very high degree of accuracy? For non-testing telemedical or teletherapy services, is the quality of the service high enough that we would recommend it to loved ones without hesitation? If not, why not? For health products, does the product or device meet a high level of safety? Is it manufactured with high quality standards? Has it – or have its ingredients – been subjected to studies that confirm effectiveness?

User-friendly: How intuitive and convenient is the service or product? Does the device, program, app, or website achieve a good degree of user-friendliness for its customers?

Value: Are you getting your money’s worth? Are there any hidden costs or charges? Does the company offer discounts?

Privacy: If health data is stored, will your data be stored securely? Are payments secure? Does a company market your information?

Customer support: Particularly in situations where ‘one size fits all’ doesn’t make sense, how well does the company help to make the service or product ideal for you or address your individual needs?

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