KYIR Fuller Active Hair Serum is a 50 mL leave-in scalp serum built around a lightweight, direct-to-scalp routine. The listed formula includes Redensyl®, Follicusan®, biotin, caffeine, saw palmetto, pumpkin seed oil and botanical ingredients.
Dropper format for a direct-to-scalp routine.
See the serum in a real routine.
A closer look at the bottle, dropper and scalp-application routine. Follow the product label for your use.
Formula Highlights
Redensyl® and Follicusan®
Biotin and caffeine
Saw palmetto and pumpkin seed oil
Lightweight leave-in format
How to Use
Apply 1–2 full droppers to the scalp according to the current package directions, wait briefly, massage gently with fingertips and leave the serum in. Stop use if irritation occurs.
Good to Know
Hair and scalp needs vary. This is cosmetic hair care, not a medical treatment. Persistent or unexplained shedding or scalp changes should be discussed with a qualified healthcare professional.
Size: 50 mL / 1.7 oz.
Product User Experiences
Selected experiences with this product, shared from purchases made elsewhere. These are not reviews of purchases from Faveyloon. Summaries preserve each person's meaning; individual experiences vary.
Mary Neely
Reports using the serum five to six times a week and finding it easy to incorporate into her routine.
NB
Includes the serum in a daily regimen and uses it alongside another hair product.
Your product guide
A closer look at your routine
Product-specific guidance drawn from the details listed for this item.
01
What it does
KYIR combines patented Redensyl® with Follicusan®, biotin, saw palmetto, ashwagandha, caffeine, horsetail and pumpkin seed oil in its Follicle Synergy System™. Faveyloon presents it as a leave-in scalp and hair-care formula focused on scalp conditioning, routine consistency and the appearance of fuller, healthier-looking hair; no specific growth outcome is guaranteed.
02
How to use it
KYIR recommends applying 1–2 full droppers directly to the scalp. Allow 10–15 seconds before massaging with fingertips. Works best on dry or towel-dried hair. Do not rinse. Style as usual.
03
Before you begin
For external use only. Follow the product label and review the full ingredient list. Avoid contact with eyes and application to broken or irritated skin. Discontinue if irritation occurs. Consult a qualified healthcare professional for scalp conditions or unexplained hair loss.
Product user experiences
4.94 out of 5 · 18 product experiences
Experiences with this product shared outside Faveyloon, not purchases from our store. Original ratings and wording are retained. Individual experiences vary.
★★★★★
Love the texture and non greasy serum
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Love the texture and non greasy serum. Just waiting to see results 🙏
★★★★★
Great
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Fuller active hair serum
★★★★★
Must try! Stopped hair loss due to pregnancy.
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
I’ve now finished my first bottle and into the next one. Wanted to try this since pregnancy increased my hair loss and started seeing bald spots. I cannot report yet progress on the bald spots but definitely my hair loss is back to normal even in the midst of postpartum/breastfeeding which usually increases ha...
Read full experience
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
I’ve now finished my first bottle and into the next one. Wanted to try this since pregnancy increased my hair loss and started seeing bald spots. I cannot report yet progress on the bald spots but definitely my hair loss is back to normal even in the midst of postpartum/breastfeeding which usually increases hair loss.
Also I’ve received comments that my hair looks very shiny and full overall.
★★★★★
Obsessed with this serum
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Obsessed with this serum my hair is gradually getting denser I’ve noticed my shedding has decreased and hair feels much fuller! The smell is also addicting and i love that it doesn’t make my hair greasy! The ingredient list is actually impressive!
★★★★☆
Used it for a short time For now I like it- less
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Used it for a short time
For now I like it- less hair falling and better hair shine
Will continue to use it
★★★★★
Part of my daily regimen! I love partnering it
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Part of my daily regimen! I love partnering it with STRONGER too.
Before you order
Questions, answered
Where can orders be shipped? +
We ship to eligible U.S. addresses. Processing is estimated at 1–3 business days, followed by an estimated 5–9 days in transit after dispatch. These timeframes are not guaranteed and may vary by supplier and carrier. Applicable shipping rates appear at checkout. Please review our Shipping Policy.
What is the return policy? +
Damaged, defective or incorrectly supplied items should be reported to support@faveyloon.com within 15 days of delivery, with your order number and photos where reasonably possible. Contact us before returning anything. For a size, color or variant you selected incorrectly, an exchange requires prior approval, is not guaranteed and has no fixed request deadline; if approved, you pay the disclosed return, replacement shipping and other agreed additional costs. Faveyloon covers authorized return and replacement shipping for confirmed seller-caused errors or damaged/defective goods. Change-of-mind returns are not offered, except where required by law.
How are products selected? +
We review product features, available information and supplier details. Each product page explains the item offered.
Product user experiences
4.94 out of 5 · 18 product experiences
Experiences with this product shared outside Faveyloon, not purchases from our store. Original ratings and wording are retained. Individual experiences vary.
★★★★★
Love the texture and non greasy serum
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Love the texture and non greasy serum. Just waiting to see results 🙏
★★★★★
Great
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Fuller active hair serum
★★★★★
Must try! Stopped hair loss due to pregnancy.
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
I’ve now finished my first bottle and into the next one. Wanted to try this since pregnancy increased my hair loss and started seeing bald spots. I cannot report yet progress on the bald spots but definitely my hair loss is back to normal even in the midst of postpartum/breastfeeding which usually increases ha...
Read full experience
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
I’ve now finished my first bottle and into the next one. Wanted to try this since pregnancy increased my hair loss and started seeing bald spots. I cannot report yet progress on the bald spots but definitely my hair loss is back to normal even in the midst of postpartum/breastfeeding which usually increases hair loss.
Also I’ve received comments that my hair looks very shiny and full overall.
★★★★★
Obsessed with this serum
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Obsessed with this serum my hair is gradually getting denser I’ve noticed my shedding has decreased and hair feels much fuller! The smell is also addicting and i love that it doesn’t make my hair greasy! The ingredient list is actually impressive!
★★★★☆
Used it for a short time For now I like it- less
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Used it for a short time
For now I like it- less hair falling and better hair shine
Will continue to use it
★★★★★
Part of my daily regimen! I love partnering it
Product user experience shared outside Faveyloon; not a Faveyloon purchase. Individual experiences vary.
Part of my daily regimen! I love partnering it with STRONGER too.
Explore more
More to discover
Compare product details and choose the items that fit your personal care routine.
