Can a helmet or a cap with a bunch of tiny light bulbs in it stop your hair loss and even regrow thicker, fuller hair?
Do laser hair growth caps and helmets work?
According to science (and thousands of testimonials), the answer is YES.
That’s why many doctors and hair restoration specialists prescribe a laser cap to their patients.
Low-level laser therapy has been clinically shown to effectively treat hair loss (androgenetic alopecia), prevent receding thinning hair, and regrow thicker, fuller hair – in 3-6 months.
And the best part?
A laser cap is a non-invasive, painless, and completely safe way to stimulate hair follicles to grow thicker, fuller, and even more pigmented.
(The many studies are listed at the end of the post).
👉 In a hurry?
See our top picks compared:
|Kiierr Laser Cap
|30 minutes - every other day
|7 months trial
|✅$799 with code MOSTPOPULAR200 at Kiierr
|HairMax PowerFlex Laser Cap
|Only 7 minutes - 3 times a week
|✅ $1200 with code USA20 at Hairmax
|illumiFlow Laser Cap
|30 minutes - 3 times per week
|6 months trial
|✅ $799 at Illumiflow
|HairMax Laser Band
|90 seconds - 3 times per week
|1 year trial
|✅ $640 with code USA20 at HairMax
|iRestore Laser Helmet
|25 minutes - every other day
|6 months trial
|✅ $595 on Amazon
In this post, you’ll find the 6 best FDA-cleared laser caps/helmets for hair regrowth, their pros and cons, and a full comparison between them – to help you make the best choice for your needs.
This post may contain affiliate links, at no extra cost to you.
- How Do Laser Caps Help Regrow Hair?
- The 6 Best Laser Hair Growing Caps & Helmets (Reviewed)
- Are Laser Therapy Caps & Helmets Proven to Work?
- Laser Caps for Hair Regrowth Side Effects
- Do You Have to Keep Using the Laser Cap to Keep the Results?
- Do Laser Caps Work for Dark Hair?
- Laser Caps FAQ
How Do Laser Caps Help Regrow Hair?
To understand how infrared hair growth caps can regrow hair, you should know that hair growth is a natural process that occurs in cycles.
Each hair strand goes through a growth phase (anagen), a resting phase (telogen), and a shedding phase (catagen).
Hair loss or thinning can happen when this cycle is disrupted or when hair follicles become dormant.
Imagine your hair follicles as mini-gardens that need sunlight to thrive. In this analogy, laser caps act as the sun, providing a boost of energy to stimulate hair growth.
Just like plants need sunlight for photosynthesis, your hair follicles require light energy to produce and maintain healthy hair.
Laser caps provide this energy to the hair follicles and “wake them up”.
(Want to know more? See exactly how red light therapy for hair loss works)
What is the Best Wavelength for Hair Growth?
According to studies, the best wavelength for hair growth is between 630nm to 660nm.
Red light therapy with a wavelength of 650nm has been found to be the most effective and practical wavelength for stimulating hair growth, which is why most laser caps use this exact wavelength.
The 6 Best Laser Hair Growing Caps & Helmets (Reviewed)
Below you’ll find the top 6 laser hair growth caps (and helmets) compared, followed by our review, and the pros and cons of each laser hair growth device.
All the laser caps you’ll find here have been clinically shown to:
- Grow new hair.
- Double the follicle diameter of existing hair (reverses miniaturization).
- Slow (and even stop) hair loss.
1. Kiierr Laser Cap Best Overall
The FDA-cleared Kiierr Laser Cap has 272 medical-grade lasers concealed inside a sports cap (full scalp coverage) with a total output of 1360 mW, and guarantees to stop hair loss dead in its tracks within 30-90 days, followed by regrowth of new, thicker hair within 180 days.
The Kiierr works on AA batteries and is completely hands-free and portable.
Treatment time is 30 minutes every other day, and the cap is 100% hands-free and portable, so you can walk around freely while you doing the treatments.
The combination of the highest strength and a reasonable price makes it our top pick for 2024.
Kiierr’s customer service is responsive and reliable, and you get a long free trial – 7 months.
This is quite enough to protect your investment and shows how confident Kiierr is about the hair growth results you can achieve.
The 2-year warranty includes replacement with a new device in case of any malfunction, with free shipping.
Kiierr offers 3 models – one with 148 lasers, the other with 272 lasers, and the third with 272 lasers and larger coverage, or complete hair regrowth bundles – with DHT-blocking shampoo, DHT-blocking vitamins, and hair growth conditioner.
👉 We were very impressed with the genuine customer reviews and their before and after pictures, showing remarkable hair growth!
The DHT-blocking supplement is 100% natural and contains Saw Palmetto, Horsetail Extract, and zinc formula to help slow/inhibit 5-AR enzyme conversion to DHT (which is suspected to cause hair loss).
✅ Available at Kiierr ($799 with coupon code MOSTPOPULAR200)
2. HairMax 272 PowerFlex Laser Cap Longest Trial
The HairMax PowerFlex also has the same specs – 272 medical-grade lasers, full scalp coverage, and a total output of 1360 mW’s, but the price is much higher than the Kiierr laser cap. In fact, it’s double the price.
Because the Powerflex has a dual operating mode technology for a choice of constant or pulsing laser lightwave for 15-minute or 30-minute treatment time.
Also, the treatments are needed just 3 times weekly, and you get the longest free trial in the industry – one year.
The flexible design, which looks like a regular sports cap, is 100% portable and comes with a built-in rechargeable battery pack.
The silicone inserts (water-resistant for easy cleaning) conceal the 272 lasers and internal circuitry while protecting the diodes and keeping them clean.
Treatment time is 15-30 minutes – 3 times a week – and you can choose a constant or pulsating laser with the dual operating mode.
The HairMax laser cap helps restore your hair’s natural growth cycle by promoting blood circulation and oxygen while boosting DHT elimination (high levels of DHT can cause hair loss) – resulting in increased density, fullness, and growth.
HairMax PowerFlex Pros
- Discrete hair treatment – flexible sports cap design
- 100% portable
- A Comfortable laser cap
- Powerful – 1360 mW’s output
- An easy-to-use controller with an illuminated timer and battery level indicator
- A 6-month money-back guarantee
- 1-year warranty
✅ Available at Hairmax ($1200 with code USA20)
👉 Lower-cost alternative – The HairMax LaserBand 82 – which costs much less and only requires a 90-second treatment – 3 times a week (but less coverage)!
3. illumiFlow 272 Laser Cap Longest Warranty
The illumiFlow Laser Cap promises to “regrow your confidence – or your money back”, offering a 6-month money-back guarantee and a 5-year warranty on all laser caps.
Results are expected within 4-6 months of treatment, and the first result to expect is a reduction in hair loss, followed by new, thickened hair growth.
The FDA-cleared IllumiFlow is also designed as a sports cap and is 100% portable and discrete.
It’s simple to use: all you have to do is connect the cap to your charged battery pack, place it on your head (it has full coverage), and flip the switch to start your 30-minute treatment.
The 272-laser model costs much less than the HairMax PowerFlex and will last for 20,000 full-scalp treatments.
Want to see an Illumiflow unboxing? check it out below:
illumiFlow 272 Laser Cap Pros
- Discrete treatment thanks to the sports cap design
- Lasers are calibrated to 650nm, the optimal wavelength for hair growth
- Flexible and comfortable
- A lot of lasers, a lower cost than the HairMax
- 6-month money-back guarantee
- 5-year warranty
- 15-30 minutes 3 times a week
- Up to 20,000 treatments
- It May not fit smaller heads perfectly
- The laser panel is a hard shell and is separate from the baseball cap, which means you have two pieces that you have to fit together to use. This can cause the hat to slip or the hard shell to break if you are not careful
4. iRestore Laser Helmet for Hair Regrowth
I’m not a fan of the helmet. It’s made of rigid plastic and you can’t wear it while you are out and about.
It also doesn’t mold to the shape of your head.
However, I had to add it to the list because the price is lower for these types of laser hair growth devices.
The FDA Cleared iRestore hair loss laser treatment helmet was designed for both men and women with a receding hairline, balding and thinning hair.
And that’s not all:
When this 16-week study ended, 100% of men and women saw a visible improvement in hair growth, with more than a 43% increase in hair count, after using the iRestore for 30 minutes every other day.
The 51 medical-grade lasers and LEDs inside the helmet radiate light energy that is absorbed by the hair follicles to enhance cell metabolism rate and reactivate follicles to stimulate hair growth.
Dermatologist Dr. Andrea Suarez has had wonderful results with the iRestore helmet, and during her 18-month journey with the iGrow has noticed an increase in hair strength, reduced hair breakage, and an increase in hair thickness, particularly in her ponytail.
- Good coverage – the laser diodes and LEDs are speckled all over the interior of the helmet.
- No over-use risk – built-in automatic shut off after 25 minutes. You can also shut off the unit at any point during hair treatment.
- Eye damage prevention – The iRestore Laser Hair Growth helmet has two sensors placed inside the cap, to prevent the cap from emitting laser unless it is fitted on your head.
- Long life span – the iRestore was tested in a world-renowned lab to last at least 5 years.
- Fits most head sizes comfortably – the system will generally fit a head circumference range of 21 to 24 inches. There’s an adjustable component inside that allows for proper fit.
- Can be used along with any other hair loss treatments (we recommend trying Jamaican Castor oil).
- Comfortable to use – it has small cushions all around it so it’s completely painless to use it.
- Low power compared to the top competitors
- The helmet does not cover the backside and the side of the head directly above the ears. However, (Low-Level Light Therapy) has a cascading effect that, if given the time, will result in improvement outside the immediate treatment area to benefit the entire scalp.
- Needs to stay plugged in during treatment, and you can’t go out and about with it.
- Doesn’t mold to the shape of the head
✅ Available on Amazon ($599)
5. iGrow Laser Hair Growth Helmet
Here’s something interesting:
The FDA-cleared iGrow is an almost identical device to the iRestore laser helmet in terms of optical and electronic function (21 laser diodes, 30 LEDs – 650-670 nm, delivered at 3-4 joules per cm2).
Actually, All the technology is the same except for the design and the audio earphones you can see in the image.
You even get the same 6-month money-back guarantee if it doesn’t work for you.
It’s also been proven to increase hair count (by 36%) in 16 weeks – in two published clinical studies.
The iGrow price is lower than the iRestore.
- Lower price than all laser caps We’ve found
- Comfortable and easy to use
- Good for travel – very easy to take through airports and use while away from home
- The headphones are of high quality and the sound is excellent
- Automatic shut off after 25 minutes
- Excellent customer service, available at all times
- From what I found here, many users insist that it works if you are consistent. You can see their before and after pictures too.
- Low power compared to the top competitors
- Amazon users rate this one lower than the iRestore.
✅ Available on Amazon ($449)
6. Theradome Hair Growth Helmet
The Theradome has 80 medical-grade lasers (678 nm low-level laser) to be exact – and no LEDs.
This means that potentially, you will get quicker and better results than the iGrow and the iRestore.
If used as directed, Theradome claims to stop hair loss within 18-26 weeks, regrow hair within 28-52 weeks, and provide fuller, thicker hair after 100 weeks.
Also, the Theradome is cordless (comes with rechargeable batteries), meaning you are free to walk around with it.
And that’s not all:
Theradome is manufactured in the USA and is recommended by hair rejuvenation experts such as Bosley and HairClub.
Theradome Laser Hair Helmet Pros
- 80 laser diodes and full coverage (you can get the 40 LEDs model – the Theradome Evo laser hair growth device – for about half the price on Amazon)
- Portable hair growth device
- Counts your treatments – an automated treatment counting system keeps track of the total number of treatments you’ve undergone.
- Reaches all areas, including above the ears
- Shorter treatment time – only 20 minutes – twice a week
- Lightweight (only 1 pound) – doesn’t feel heavy on your head
- Automatic shut off after 20 minutes
- Fits all head sizes – it has foam inside that can be used for smaller head sizes.
- 1-year warranty and 120-day money-back guarantee for US citizens.
- Low power
- Mixed reviews about customer service
- Won’t work for advanced hair loss (dead hair follicles)
- Much more expensive than the last two
✅Available on Amazon ($995)
Capillus Laser Cap Review – Why Pay More?
The Capillus company, which sells 3 low-level laser hats/caps, claims that you’ll regrow your hair – in only 6 minutes a day.
And the price matches the claim – almost $450 for the 82-laser one, and almost $1200 for the 202-laser cap.
(Forget about the pro model – with 272 lasers – which costs about $3000. 🙄)
Through our research, we’ve found that there is very little evidence to support the efficacy of the Capillus caps (they’ve conducted no clinical trials), and buyer reviews are less than stellar.
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👉 You can see all the Amazon buyer reviews HERE.
Yes, it’s completely mobile, and you can use it outdoors with no one knowing your little secret.
We conclude that if you’ve never tried laser hair growth treatments and proved that this home technology works for you, the huge investment may not be worth it.
Are Laser Therapy Caps & Helmets Proven to Work?
Laser caps utilize Low-Level Laser Therapy (LLLT) as a scientific principle behind them.
It involves using safe, low-intensity lasers to deliver light energy to the scalp, stimulating cellular activity within the hair follicles.
This stimulation helps to promote hair regrowth and improve the overall condition of the scalp.
A 2019 study published in Lasers in Medical Science found that a laser therapy helmet increased hair thickness and covered bald patches in men and women with androgenetic alopecia.
Similarly, a 2018 study in the Indian Journal of Dermatology, Venerology and Leprology linked low-level laser therapy to improved outcomes and image satisfaction in androgenetic alopecia patients.
If you truly want it to work (and I know you do) – you’ll have to be consistent with your home treatments. According to dermatologist Dr. Anna Chacon, it is ideal to repeat the treatment routinely for the best results.
Can you do that if the result is new, shining baby hair?
Of course you can.
Laser Caps for Hair Regrowth Side Effects
Laser caps are generally considered safe and have minimal side effects. However, there are potential side effects that should be taken into consideration:
1. Scalp irritation – some people may experience scalp irritation or itching after using a laser cap (this means that blood is flowing into the area – which is good). If you feel your scalp is very irritated, adjust the intensity of the laser (if possible) or reduce the treatment frequency.
2. Redness and swelling – in some cases, laser cap therapy can cause temporary redness and swelling on the scalp. This is usually mild and resolves on its own within a few hours.
3. Hair shedding – laser cap therapy can cause temporary hair shedding in some people. I was alarmed by this and stopped using my laser cap, which was a mistake.
I later found out that this shedding is a natural part of the hair growth cycle and is typically followed by new hair growth.
If you are taking medications that affect skin sensitivity to light, consult with your doctor before use. Do not use LLLT if you have skin cancer on your scalp.
How to use a Laser Cap Safely
First, always follow the instructions.
Do not be tempted to use the device more than directed – it won’t work better or faster if you do, and the instructions are based on clinical studies that tested the best way to use them to get the best results.
Second, do not stare directly at the laser lights – they are very bright. If you are worried, use goggles.
Can Laser Caps Cause Cancer?
According to research, laser cap treatments for hair loss do not cause cancer.
More than 2000 clinical studies were conducted on the use of LLLT and all of them have found no DNA mutational effects resulting from treatment.
The short UV waves (280 – 400 nm) are the type of waves that have been linked to skin cancer, and they are at a different wavelength from red light therapy.
👉 Here’s a study proving red light therapy is safe even when skin cancer is present.
Do You Have to Keep Using the Laser Cap to Keep the Results?
Yes, you do have to keep using the laser cap to keep the optimal results of hair growth. However, with time you can reduce the frequency of usage to once a week. As with any other hair loss treatment (other than hair transplant) – the answer is yes.
In fact, through my research, I’ve found that a few users who thought that the treatment did not work for them discovered that their hair started falling out when they stopped using it and realized that their helmet actually stopped their hair loss.
Because the follicles have “weakened,” they need constant revitalizing from the lasers (or whatever other treatment you are using).
Once you finish the suggested treatment period, you can cut down to “maintenance” treatments once or twice per month.
Do Laser Caps Work for Dark Hair?
Yes, laser caps can work for dark hair. However, you should know that the FDA has not cleared these devices for dark skin.
Refer to the Norwood-Hamilton Scale (approved: Class Ila to V) / Ludwig-Savin Scale (approved: Class I to II) and Fitzpatrick Skin Type Scale (approved: Type I to IV) for compatibility.
Laser Caps FAQ
There are dozens of frequently asked questions about LLLT for hair loss home treatments, here are the answers to most of them:
How Long Should You Use a Laser Hair Growth Cap?
Laser helmet treatment time varies greatly, depending on the number of LEDs/lasers. Treatment time ranges from 5-20 minutes per session, 2-3 times a week.
Overusing is not recommended, as it may increase hair loss.
Can Laser Caps Be Used with Other Hair Loss Products?
Yes, laser caps can be safely used with other products such as Rogaine and Minoxidil. In fact, laser therapy can help make these other treatments more effective.
Do You Have to Cut Your Hair to Get the Laser to Work?
Your hairstyle and length will not interfere with your LLLT home treatment because it has a cascading effect and a systemic effect, which will result in improvement outside the covered treatment area.
Some experts believe that laser combs can reach the scalp better than helmets – because the comb design makes you part your hair and allows the light energy to reach your scalp better.
Can Laser Caps Be Used After Hair Transplants?
Yes, laser caps can be used after hair transplants. However, experts advise you to wait at least 30 days before you start using it, and consult with your surgeon to be on the safe side.
To your health and happiness,
Jimenez, J.J., Wikramanayake, T.C., Bergfeld, W. et al. Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind Study. Am J Clin Dermatol 15, 115–127 (2014).
Avci P, Gupta GK, Clark J, Wikonkal N, Hamblin MR. Low-level laser (light) therapy (LLLT) for treatment of hair loss. Lasers Surg Med. 2014;46(2):144–151. duced Hair Regrowth.” (2005).
Zarei, M., Wikramanayake, T.C., Falto-Aizpurua, L. et al. Low level laser therapy and hair regrowth: an evidence-based review. Lasers Med Sci 31, 363–371 (2016).
Urysiak-Czubatka I, Kmieć ML, Broniarczyk-Dyła G. Assessment of the usefulness of dihydrotestosterone in the diagnostics of patients with androgenetic alopecia. Postepy Dermatol Alergol. 2014;31(4):207‐215.