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Bestseller

Kiierr Laser Cap Hair Growth System

A clinically proven, hands-free solution for thicker, fuller hair—just wear it and let the technology do the rest.

Clinically Proven for Hair Regrowth

Visible Results in 7 Months

Effortless, Hands-Free Design

Thinning

Balding

Receding

Start Your Hair Regrowth Journey

7 month money back guarantee

Life-Changing Hair Transformations

Life-Changing Hair
Transformations

See how Kiierr has transformed hair regrowth journeys with real success from real people.


Scientific Proof You Can Trust

Backed by extensive research, Kiierr’s advanced laser technology is clinically
proven to stimulate hair growth and combat hair loss effectively.

Dive into groundbreaking research and reliable studies that highlight the effectiveness of red light technology in combating hair loss and encouraging healthy regrowth. The results speak for themselves, demonstrating the proven success of laser hair growth.

Clinical Study 1

The Impact of Low-Level Light Therapy (LLLT) on Hair Regrowth

  • Research demonstrated a 43% increase in hair growth in 100% of participants within just 9 weeks.
  •  Findings confirmed that LLLT stimulates dormant hair follicles and prolongs the growth phase for thicker, fuller hair.

Clinical Study 2

Home-Use LLLT Devices Show Significant Hair Growth

  • In a meta-analysis of FDA-approved devices, participants using LLLT experienced a noticeable increase in hair density compared to placebo groups.
  • This study supports LLLT as a safe, at-home solution for androgenetic alopecia.

Clinical Study 3

Evidence of Effective Hair Density Improvements with LLLT

  • Over 90% of study participants reported reduced hair loss and improved hair coverage in just 12 weeks of LLLT treatment.
  • Results showed consistent hair follicle stimulation without adverse effects.

Clinical Study 4

24-Week Study on LLLT’s Efficacy for Hair Loss

  • A randomized, double-blind trial revealed significant increases in hair thickness and density among LLLT users.
  • Findings concluded that LLLT is a highly effective treatment for androgenetic alopecia when used consistently.

Clinical Study 1

The Impact of Low-Level Light Therapy (LLLT) on Hair Regrowth

  • Research demonstrated a 43% increase in hair growth in 100% of participants within just 9 weeks.
  •  Findings confirmed that LLLT stimulates dormant hair follicles and prolongs the growth phase for thicker, fuller hair.

Clinical Study 2

Home-Use LLLT Devices Show Significant Hair Growth

  • In a meta-analysis of FDA-approved devices, participants using LLLT experienced a noticeable increase in hair density compared to placebo groups.
  • This study supports LLLT as a safe, at-home solution for androgenetic alopecia.

Clinical Study 3

Evidence of Effective Hair Density Improvements with LLLT

  • Over 90% of study participants reported reduced hair loss and improved hair coverage in just 12 weeks of LLLT treatment.
  • Results showed consistent hair follicle stimulation without adverse effects.

Clinical Study 4

24-Week Study on LLLT’s Efficacy for Hair Loss

  • A randomized, double-blind trial revealed significant increases in hair thickness and density among LLLT users.
  • Findings concluded that LLLT is a highly effective treatment for androgenetic alopecia when used consistently.

Trusted by Experts,
Backed by Science

Trusted by Experts, Backed by Science

Amy Mckinley

Dermatology physician assistant

“I’m really impressed by the results…”

How Red Light Therapy Revives Hair Growth

How Red Light Therapy
Revives Hair Growth

Using medical-grade laser technology, Kiierr stimulates blood flow, reactivates dormant
follicles, and strengthens hair for long-term regrowth.

Using medical-grade laser technology, Kiierr stimulates blood flow, reactivates dormant follicles, and strengthens hair for long-term regrowth.

Step 1

Restore Blood Flow

Laser therapy stimulates blood flow to the scalp, delivering oxygen and nutrients directly to hair follicles, reawakening them from dormancy.

Step 2

Reactivate Dormant Follicles

The medical-grade lasers kickstart the growth cycle in inactive follicles, helping hair grow thicker, fuller, and healthier.

Step 3

Support Long-Term Growth

Consistent use strengthens hair over time, ensuring long-term results without invasive treatments or harsh chemicals.

Start Your Hair Regrowth Journey

7 month money back guarantee

Why Kiierr Stands Above the Rest

Why Kiierr Stands
Above the Rest

Cutting-edge technology, proven results, and effortless convenience—discover what
makes Kiierr the top choice for hair regrowth.

Dermatologist
Recommended

Free 2-day
Shipping

Quick &
Easy Returns

FDA
Cleared

2 Year
Warranty

Trusted by
Thousands

Start Your Hair Regrowth Journey

7 month money back guarantee

Common Questions About Kiierr

Absolutely! The great thing about Low-Level Light Therapy (LLLT) is its versatility! Whether you are male or female, 18 or 88, from pattern baldness to hair thinning due to stress or medical conditions like including alopecia areata, hormonal imbalances, telogen effluvium and so much more.

Users of all hair textures and skin tones have seen incredible results, regardless of age. Start your journey to thicker, healthier hair today and see why so many trust Kiierr for their hair growth needs!

Choosing Kiierr is like joining a family & community committed to hair recovery. Since 2017, we’ve provided top-quality, medical-grade laser caps with a solid 2-year warranty. With our 7-month growth guarantee, you can trust that we’re as invested in your hair journey as you are.

Our exceptional customer service is always ready to support your journey; real people who genuinely care, ready to guide, support, and celebrate your progress with you.

We have 4 laser cap options: 148 Pro, 272 Premier, 272 MD Elite, and 302 MD Ultra Flex. Choosing the right cap depends on your specific needs. For early stages of hair loss or those on a budget who are okay with slower, steadier results, the 148 Pro is ideal. If you’re seeking more significant and quicker regrowth, the 272 Premier is our bestseller.

For larger head sizes or extensive coverage, the 272 MD Elite is perfect. Lastly, the 302 MD Ultra Flex offers the fastest results and superior comfort. Ideal for severe hair loss, this model also offers a soft flex fit for maximum comfort.

Yes! We offer flexible payment options through Affirm, Afterpay, and PayPal Pay Later, providing easy monthly installments or delayed full payments to suit your financial situation.

  • Affirm allows you to split your purchase into easy monthly payments with interest rates as low as 0% APR.
  • Afterpay allows you to split your purchase into four equal installments, due every two weeks, no interest or fees. PayPal Pay Later, you can choose to pay in full within 6 months with no interest, or make minimum monthly payments with interest.

Just pick what works for you at checkout!

Results vary, but most users see noticeable improvements within 6-12 weeks. We’re so confident in our product that we offer a 7-month growth guarantee—if you don’t see results, you can return the cap!

Laser therapy is a safe, non-invasive, and natural way to treat hair loss before considering more drastic measures like medications or surgery.

Yes! Kiierr laser caps are completely safe and FDA-cleared for hair growth. Unlike harsh chemicals or invasive procedures, our caps use low-level laser therapy (LLLT), a clinically proven technology that gently stimulates your hair follicles without pain, irritation, or side effects. LLLT has been backed by decades of research and is trusted by doctors and hair restoration experts. You can use your cap confidently, knowing it’s a safe, non-invasive way to give your hair the boost it needs.