Full Clinical Study

Clinical Study Highlights:

  • A double-blind, placebo-controlled clinical study showed a significant increase in the active hair growth phase (Anagen) and a decrease in the resting phase (Telogen) over a 3-month period. This shift in the hair growth cycle resulted in a visible improvement in hair density for participants using the serum.

  • On average, participants gained an impressive +10,000 new hairs, with some individuals seeing up to +28,200 new hairs within the 3-month timeframe.

  • The study also demonstrated an increase of up to 17 new hairs per cm², showcasing the serum's ability to promote thicker, fuller-looking hair.

  • 71% of participants reported noticeable improvements in hair thickness, strength, and growth speed, reflecting their satisfaction with the serum's performance.

Independent Laboratory Testing:

  • Ex-vivo tests on human hair follicles showed that Redensyl®, a revolutionary ingredient in our serum, stimulated hair follicle growth by a remarkable +214% in just 10 days.

  • In these same tests, Redensyl® outperformed the industry standard, Minoxidil, by 1.8 times in promoting hair follicle growth, highlighting its superior efficacy.

The Power of Redensyl®:

Redensyl® works by reactivating hair follicle stem cells and boosting the metabolism of dermal papilla fibroblasts, essential components for healthy hair growth. This unique mechanism of action helps to:

  • Stimulate Hair Follicle Activity: Kickstart dormant hair follicles into their active growth phase.

  • Reduce Hair Loss: Prolong the hair growth phase and delay the onset of the resting phase.

  • Improve Hair Quality: Strengthen hair shafts, increase hair thickness, and promote faster growth.

Do you offer any discounts?

Yes! Enjoy 10% off your first order when you sign up for emails and text messages.

We also feature different promotions and sales throughout the year. Make sure you're subscribed to our emails and text messages and follow us on Instagram to stay in the know.

Do you ship internationally?

We currently ship to the continental United States only.

How long will it take to receive my order?

Order processing time is typically 1-2 business days. Once your order has been processed, shipping timeframes will apply depending on the type of shipping method you have selected. Standard shipping across the continental United States vary between 2-5 business days. Express shipping timeframes vary between 2-3 business days.

Can I expedite my order?

We love your enthusiasm and want to get our products to you as quickly as possible! Although we do not offer expedited order processing, express shipping options are available at checkout for your convenience. Please note that shipping options may change from time to time.

How do I check the status of my order?

You will receive an email confirmation from KYIR Fuller Hair immediately after your order is received and another email when your order ships (be sure to check your spam folder). Follow the tracking link in the shipping email for the most up-to-date delivery status.

If the tracking progress has not changed for 5 days or if your order is missing, please send an email to customerservice@lovekyir.com or reach out via Instagram chat at @lovekyir.

How do I become KYIR Fuller Hair retailer?

We'd love to partner with you! To apply for a wholesale account, please email our customer service team at: customerservice@lovekyir.com. A member of our wholesale sales team will get back to you shortly.

How do subscriptions work?

Want to get 20% off + free shipping and have one less item on your to-do list? Great hair on a fulltime basis awaits!

  1. Shop our collection of Subscribe & Save products.
  2. On any Subscribe & Save product page, select the "Subscribe & Save 20%" purchase option and choose your shipping frequency. Then add the item to your cart and complete your purchase.
  3. We'll ship you the product automatically, on your schedule. Make changes any time!