The Growcomb uses patent-pending ETG technology to help stimulate the hair follicles, and optimise hair follicle growth phase. See results below.

Aman's results:

3 months

Aman's centre parting was becoming larger and more obvious every month. The scalp was clearly visible and overall the hair quality was thin and getting worse. The visible scalp extended right from her frontal hairline to the back of her head.

After using the Growcomb, Aman's centre parting reduced in size from 1.5 cm to just  0.5 cm as well a reduction in length. Her overall hair quality thickness and volume increased noticeably too.

Cuong's results:

3 months

Cuong had severe thinning over the entire top scalp, with the crown being the worst area with the most visible scalp. Without improvement the best option may have been a shaved head.

After using the Growcomb, Cuong had noticeable thickness and density improvement with an approximate +65% overall increase in visible hair coverage.

How does the Growcomb work?

All hair follicles go through 3 phases known as the hair growth cycle before shedding:

1: Anagen (growth) phase
2: Catagen (transition) phase

3: Telogen (resting) phase

For someone with perfectly healthy hair, the majority of the hairs are in the growing phase, with a much lower percentage in the resting phase.

If too many hairs are in the resting phase, your hair appearance itself will be thin, lifeless, slow-growing and fall out easily.

The Growcomb is a cosmetic device that uses a patent pending technology, known as ETG to optimise the hair follicle growth phase.

Results may vary, but as seen in the before and after photos from our study which you can see here, the results can be thicker, stronger, healthier hair with more life.

Jeremy's results:

3 months

Jeremy had a severe widow's peak and thinning crown area which continued to worsen. The visible crown area was approximately 6cm in diameter.

After using the Growcomb, Jeremy's crown area reduced from a diameter of 6 cm to 2.5 cm with the centre also growing thicker vellus hairs. Frontal hairline was improved in thickness and density with temple area moving visibly forward.

Patrick's results:

3 months

Patrick was rapidly losing hair throughout the top of his scalp. The crown area of exposed scalp was approximately 6cm wide. And at the front the centre parting was 4cm wide.

After using the Growcomb, Patrick's crown area had reduced from 6cm to 2cm. At the front, the centre parting had reduced from 4cm to 3cm. Overall hair quality and density was quickly improving.

What is ETG?

ETG stands for electrotrichogenesis.

If we break down this word into its component parts we get:

Electro = using electricity

Tricho = referring to the hair

Genesis = the formation of something new

The Growcomb works by emitting a pulsed electrostatic field through the glass diodes which come in contact with the root of the hair follicle.

This helps kickstart the hair follicle back into growth phase.

Hairguard has developed and has a patent pending on this product lead by senior product developer Bernhard Rudhert so that anyone with thin, receding and lifeless hair can benefit from this amazing scientific discovery.


"When I saw the very promising results of a clinical study using ETG technology, I put aside my skepticism and accepted an offer to design a small, affordable battery powered ETG device. Meeting stringent regulatory standards for such a product was no small challenge even after many years of design experience. I believe this is the major reason why this technology did not reach the open market so far.

Selling my product as a hair regrowth device would require the unaffordable FDA approval. The inexpensive clearance process used for Laser devices was not available for this product as it was the first of its kind on the market. Also, FDA clearing allows for a wide range of effectiveness. Since the quality of my product is certified to be the same as FDA cleared devices the only thing missing is the FDA statement that the device regrows hair. So, offering my device as a consumer product without any claims saves my customers a lot of money without sacrificing performance.

I sincerely want my clients to get maximum possible relief from the often devastating problem of hair loss and will be glad to share my extensive experience in the field wherever it can be of help."

 - Bernhard Rudert BSc Eng, Inventor of the Growcomb

Eric's results:

3 months

Eric had severe thinning at the frontal area and mild to moderate thinning over the rest of the top of the head to the point where completely shaving it off may have been the best choice.

After using the Growcomb, the mid section of the top of Eric's head improved the most as hair thickness improved. Generally the hair was observed to be thicker and stronger. The frontal area went from being almost completely bare to shows signs of stronger, thicker hair growth.

Ken's results:

3 months

Ken was losing significant hair around his crown area, although his hairline remained fairly strong, there was some minor general thinning on top.

After using the Growcomb, his crown bald spot had become much less visible and reduced in size from about 5cm to 2.5cm. The overall hair quality on the top had improved in thickness and lustre

1: Choose your power setting.

The Growcomb comes with 4 power settings. To get started you'll want to choose power setting 1 or 2, until you get used to the sensation of the pulsed electrostatic field. Once you become familiar with the feeling you can move up to setting 3 or 4. The sensation can be described as a little bit tickly, but also quite pleasant.

2: Gently comb your hair.

Once you've chosen your setting simple comb through the areas of your hair where you would like to promote thicker, stronger hair. You'll want to brush the scalp and move in circular motions allowing the ETG technology to work its magic.

3: You're all done!

After 10 minutes of use the Growcomb will automatically turn off. You're all done for today. Just make sure you cover all the intended area in 10 minutes. You'll only need to recharge the battery less than once every week. For extra fast results, comb before bedtime and then apply the Scalp Elixir after.

Free fast shipping

Worldwide delivery

30 day guarantee

Quick, friendly support




For a limited time, save $200 on the Growcomb. Comes with free shipping!


  • No side effects

  • Doesn't harm your hormonal system

  • Affordable, rechargable and lasts a lifetime

  • Easy, quick and enjoyable to use


  • Potential side effects

  • Ageing, itchy, hormone-disrupting chemicals

  • On-going expensive monthly costs

  • Losing all the hair you've gained if you stop using them

Alex's 60 day 'hair-selfie' challenge:

Although Alex's 'hair selfies' are of low quality, we can still see just how much his hair improved after 30 and 60 days of using the Growcomb. Starting with photo on the left at day 0, then the middle photo (day 30), and then the photo on the right at day 60. Alex has gone from almost his complete top scalp being visible to almost complete coverage in just 60 days.

Verified customer reviews

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We're proud to support the countries we ♥ by designing, sourcing & manufacturing all of our core products in the USA, UK & Canada.

About us


Will started Hairguard in 2012 and has been growing the business into what it is now. He's the lead researcher, writer and product developer. He has a Master's degree in Chemical Engineering from the University of Birmingham and is based in London.


Gus joined Hairguard in 2016 as the head of Product Development. He has a First Class degree in Chemistry from the University of Bristol and worked for a leading London tech startup before joining Hairguard. Gus currently resides in London.

Dr. Anil

​Dr. Anil Simhadri completed his MBBS from the University of Cambridge. He followed it with MRCP (London) and currently works as a speciality registrar in hospital medicine in the UK. ​Dr. Simhadri helps fact check articles and improve the science-based completeness of our blog.

Easy To Use

The Growcomb is simple and easy to use. Simply brush through your hair with the glass diodes in contact with your scalp.

No On-Going Costs

Pay once and use it forever. No on-going costs like most hair loss products.

ETG tech

The Growcomb uses patent pending ETG technology developed by Bernhard Rudhert of the Hairguard team.

What's Included:

  • Growcomb with ETG technology

  • Growcomb instruction manual

  • Protective carry case

  • Rechargeable battery and cable


  • Construction: Plastic, metal, glass tubes

  • Weight: 250g

  • Dimensions: 24cm x 21cm x 9cm

  • Manufactured: Canada

Growcomb specifications
ModelV 2.3
Size24cm x 21cm x 9cm
Glass electrodes6
Power sourceRechargeable Li-Polymer battery
Shipping times2-14 days
Shipped fromU.S & U.K.
Electronics certificationCE, FCC, RoHS
PackagingProtective carry case + cardboard shipping box
Warranty period1 year
Guarantee period30 days from purchase

Frequently Asked Questions

Does this work for women too?

Our study showed the Growcomb improved the thickness and quality of female subjects just as well as male.

How long before I start seeing results?

Hair growth takes time. As such you should expect to use the Growcomb for 3 months for expecting to see results.

How long will it take to arrive?

International delivery takes 2-14 days. We currently ship from the U.S. and U.K.

Are there side-effects from using the Growcomb?

The only side effect that comes from using the Growcomb, which is extremely rare, is mild irritation to the skin. 

In this case we recommend using the Growcomb on the lowest intensity setting so that you skin gets used to it. You can then increase the intensity over time.

Are there any customs/import duties?

We ship mostly from the UK, as well as some products from the US. As such some packages may be subject to customs/import charges. 

However, it is almost impossible for us to say how much these charges will be since they depend on the laws in your country of residence and the value of your package.

We are working hard to make our distribution centres available worldwide to reduce shipping times and customs charges.

Can I use other products as well?

We strongly recommend using the other Hairguard products such as the Scalp Elixir, Shampoo, and Supplement whilst using the Growcomb.

What if I want to return the Growcomb?


We have a 30 day Return Policy, which means that if more than 30 days have elapsed since your order was placed, unfortunately we can't offer you a refund or exchange.

To be eligible to return your order, the item(s) must be unused and in their original packaging. You will then need to return it back to our warehouse. Please email to initiate the return process.

The Growcomb is your responsibility until we receive it back at warehouse, so we recommend you send it via a Tracked & Signed For service. 

If we receive a returned item that is damaged or not in its original packaging then we reserve the right to refuse the refund.

If your item is eligible for a refund we will usually process the refund in 1 working day, and then the refund can take up to 10 working days to be credited to your bank account


Customers can cancel their order as long as their order has not started processing. Please email with URGENT in the subject line. Unfortunately we do not guarantee we will be able to cancel the order.

Terms & conditions of payment

If any any point you're not satisfied with any of your purchases from us then you have a full 365 days to request a refund. Simply email us by replying to your receipt to make your refund request. We will then issue your refund within a maximum of 48 hours, no questions asked. Payments are made through secure 3rd party providers, Stripe and PayPal. You can pay with PayPal or Credit/Debit card.

Medical Disclaimer


The statements contained herein have not been evaluated by the Food and Drug Administration. The Growcomb is not intended to diagnose, treat, cure, heal or prevent any condition or disease. Nothing contained on this website is intended as medical advice. If you have any questions about whether the use of this product is appropriate for you, please seek the advice of a health care professional prior to use.


The information provided on this site is for informational purposes only and is not intended as a substitute for advice from your physician or other health care professional or any information contained on or in any product label or packaging. You should not use the information on this site for diagnosis or treatment of any health problem or for prescription of any medication or other treatment. Individuals differ, as will results from our products. Please see our full disclaimer here.

Is there a warranty?

Yes, the Growcomb comes with a 1 year warranty and a 30 day money back guarantee.

What do we stand for?


We know that when it comes to hair care, there are a lot products that simply don't work. Our core principle is based on integrity to do what's best for our customer, no matter what. We also use our own products everyday so we expect the best.

Backed by science

Our products are developed using scientific principles and as a company we base our decisions on scientific evidence. Nowhere is this more obvious than in our product range where ingredients are only added based on their proven ability to support healthy hair.


When you buy online you never really know what you're getting. We want to take all the risk off you and put it on us, so you can buy with confidence. That's why the Growcomb comes with a 30 day, 100% money back guarantee.