The Perfect Pair
The Perfect Pair
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Cruelty Free
Paraben Free
Silicone Free
Gluten Free
Phthalate Free
Sulfate Free
The Perfect Pair for Healthy, Volumized, Fuller, Vibrant Hair.
FULLER Active Hair Serum features a highly-concentrated, cruelty-free, and clean formulation of clinically-proven active ingredients designed to promote immediate volume, hair density and thickness. This scientifically advanced formula revitalizes and balances the scalp while hydrating and weightlessly volumizing hair for an overall healthier and fuller look. Featuring a blend of high-performance ingredients including Redensyl, FULLER Active Hair Serum yields overall healthier hair with an improved appearance of fullness, strength, and thickness.
STRONGER Active Bonding Serum is a highly concentrated, cruelty-free formula designed to revolutionize the health and appearance of damaged and over-processed hair. This daily-use serum spray harnesses the power of nature and science, combining high-performing ingredients for unparalleled results. With consistent use, this lightweight, non-greasy serum spray visibly transforms hair, creating a smoother, stronger, and healthier mane.
Benefits
Benefits
FULLER Active Hair Serum
- Our Follicle Synergy System™ targets hair growth from every angle
- Clinically proven 2x stronger than Minoxidil
- Twice as many growth ingredients as leading competitors
- Revitalizes and balances the scalp
- Weightlessly volumizes hair
- Promotes follicle health & maximizes density at the roots
- Leaves hair feeling and looking voluminous, healthier and more resilient
STRONGER Active Hair Bonding Spray
- Encourages the appearance of thicker, stronger, more hydrated feeling hair
- Promotes healthy hair cuticles
- Revitalizes + protects over-processed hair
- Revitalizes, hydrates, and stengthens
- Smooths + tames flyaways
Directions
Directions
FULLER Active Hair Serum
Apply 1-2 full droppers of serum directly to scalp. Allow 10-15 seconds before massaging with fingertips. Works best on dry or towel dried hair. Do not rinse. Style hair as usual. Apply morning and night for best results.
* Caution: For external use only. Avoid contact with eyes.
STRONGER Active Hair Bonding Spray
Shake well before use. On dry or towel-dried hair, part hair into sections and spray evenly throughout from roots to ends, focusing on areas of damage. Coat generously and comb through hair for even distribution. Do not rinse. Style as usual. For best results, apply prior to styling hair.
* Caution: For external use only. Avoid contact with eyes.
**KYIR uses plant derived preservatives in our clean & clinically effective, small batch formulations. Each batch may vary slightly in color, and may darken with exposure to air & light. This does not indicate that the product is less safe or effective.
Ingredients
Ingredients
FULLER Active Hair Serum
Aloe Barbadensis (Aloe Vera) Leaf Juice*, Sodium Sunflowerseedate (Sunflower), (Redensyl 3%) Sodium Metabisulfite, Larix Europaea Wood Extract, Glycine, Zinc Chloride, Camellia Sinensis Leaf Extract, (Follicusan 3%) Alcohol Denatured, Panthenyl Ethyl Ether, Inositol, Milk Protein, Lactose, Acetyl Cysteine, Acetyl Methionine, Sodium Citrate, Citric Acid, Caffeine, Vegetable Glycerin, Phospholipids, Biotin, Cucurbita Pepo (Pumpkin) Seed Oil, Citrus Bergamia (Bergamot) Leaf Oil, Withania Somnifera (Ashwagandha) Root Extract*, Camellia Sinensis (Green Tea) Leaf Extract, Xanthan Gum, Equisetum Arvense (Horsetail) Extract, Serenoa Serrulata (Saw Palmetto) Fruit Extract*, Zingiber Officinale (Ginger) Root Oil, Santalum Austrocaledonicum Wood (Sandalwood) Oil, Menthol, Mentha Piperita (Peppermint) Oil, Phenoxyethanol, Ethylhexylglycerin.
*Organic Ingredient
STRONGER Active Hair Bonding Spray
Linum Usitatissimum (Linseed) Seed Extract, Vegetable Glycerin, Hydrolyzed Keratin Protein, Leuconostoc/Radish Root Ferment Filtrate, Propanediol, Squalane, Oryza Sativa (Rice) Extract, Panax Ginseng Root Extract, Camellia Sinensis (Green Tea) Leaf Extract, Oryza Sativa (Rice) Extract Organic, Palmaria Palmata (Red Seaweed) Extract Organic, Amaranthus Caudatus Seed Extract, Citrus Bergamia (Bergamot) Leaf Oil, Potassium Sorbate, Hydrolyzed Silk Protein, Sodium PCA, Sodium Lactate, Arginine, Aspartic Acid, PCA, Glycine, Alanine, Serine, Valine, Proline, Threonine, Isoleucine, Histidine, Phenylalanine, Sodium Levulinate, Sodium Anisate, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Hydrolyzed Oat Protein, Salvia Hispanica (Chia) Seed Extract, Phospholipids, Santalum Austrocaledonicum Wood (Sandalwood) Oil, Aloe Barbadensis (Aloe Vera) Leaf Extract Organic, Rosmarinus Officinalis (Rosemary) Leaf Oil Organic, Sodium Hydroxide, Biotin, Sodium Hyaluronate (Hyaluronic Acid)
*Organic Ingredient
**KYIR uses plant derived preservatives in our clean & clinically effective, small batch formulations. Each batch may vary slightly in color, and may darken with exposure to air & light. This does not indicate that the product is less safe or effective.

Complete Your Ritual
-
Stronger Active Hair Bonding Serum Spray, 100ml/3.4oz
Regular price $68.00 USDRegular price Sale price $68.00 USDUnit price / per -
Fuller Active Hair Serum (2 Bottles - 60 Days)
Regular price $133.20 USDRegular priceUnit price / per$148.00 USDSale price $133.20 USDBundle -
Fuller Active Hair Serum (3 Bottles - 90 Days)
Regular price $188.70 USDRegular priceUnit price / per$222.00 USDSale price $188.70 USDBundle -
Sold OutHealthier Hair Supplement
Regular price $72.00 USDRegular price Sale price $72.00 USDUnit price / perSold Out
MEET
STRONGER
Our NEW! daily use serum spray revolutionizing the health and appearance of damaged and over-processed hair by harnessing the power of nature and science.
@lovekyir
- 5 stars: 80 (93%)
- 4 stars: 5 (6%)
- 3 stars: 1 (1%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
Fuller active hair serum
Used it for a short time
For now I like it- less hair falling and better hair shine
Will continue to use it
Hi there! We're so glad to hear you're seeing positive results with our Fuller Active Hair Serum. Thanks for sharing your experience, and we look forward to supporting your hair care journey. Enjoy your continued use!
Part of my daily regimen! I love partnering it with STRONGER too.
I have tried everything. This serum was exactly what it said! I took before and after as the email suggested. You have a forever customer :). What a difference!
I have been using the Fuller Active serum for 60 days, and I am truly amazed by the improvement in my hair. I am thoroughly impressed and am now placing my third order. My friends have also noticed the positive changes. If you're looking for a product that delivers results, KYIR is undoubtedly the best option!
We’re so thrilled to hear about your amazing results with KYIR’s Fuller Active Serum! ✨ Stories like yours are exactly why we do what we do — clean, powerful ingredients that actually deliver. The fact that your friends are noticing the difference too? That’s the kind of transformation we love to celebrate! We cant wait to see another 60 days!
WOW is all I can say! And I think you can see why in my pic. This is ALL NEW GROWTH HAIR!! I have been using this serum daily for about 3 or 4 weeks now, particularly focusing along my hairline, and this morning when I woke up with my hair in a bun, I looked in the mirror and was shocked. Thank you so much, KYIR!
Wow, thank you so much for your amazing feedback! We're thrilled to hear about your new hair growth and that our serum is making such a positive impact. It’s fantastic to see the results you've achieved, especially along your hairline.
Thank you for sharing your experience and for your support. If you have any more updates or need further assistance, we're here for you!
Best,
Team KYIR
Being a platinum blonde is hard enough, let alone living a very active lifestyle day to day as a yoga instructor. Kyir has changed the way my hair feels on hair wash day and has played a key role in the way my hair looks and feels on day four! Sweating is part of my every day life and practice but I never have found a serum that does NOT negatively contribute to my hair after my workouts. My platinum has never looked as healthy as it does now! 🖤
I’ve been using Kyir for the past month and it’s really made a huge difference! Starting to see new growth!
I have been using this for 90 days. My hairline is more full and I have small hairs growing in from the front! I love how it gives me volume as well. I do not need a styling product in addition!
Absolutely must try hair serum!!!!!! Completely obsessed using the product AM and PM. Even my friends are asking about my hair volume and shine. Never knew I even needed the product but so glad I found it LOVE KYIR. I now have baby hairs at my hairline. You'll thank me later. I'm ordering my second bottle because I can't be without my routine.... Run don't walk on ordering yours....
For the past 10+ years I have been bleaching my hair and have always struggled with thin, damaged/brittle hair. I have bought and used just about every hair repair product in today's beauty market, spending thousands with no luck, until I got my hands on Kyir. Using Kyir's hair oil containing of plant based ingredients & Redsenyl has allowed my hair to finally GROW 2-4 inches between bleach sessions leaving it so softer, thicker, and healthier than ever before. My hair dresser was even impressed at the results!!! This is a must buy!!!
My hair has always gone through stages of thinning especially that I’m a guy. I’ve been using this 2 times a day. In the morning and at night and I have to say my hair & scalp health has had such an improvement. I’m super sensitive to so many things so it’s hard for me to trust and use a product. Hair feels and looks fuller, softer & my scalp is cleaner and I don’t feel irritated just amazed!
So lightweight and effective! I use this prior to my pomade and it adds so much volume without feeling heavy. Great scent too!
This serum revives my day-old or gym hair better than any dry shampoo on the market. Just two droppers all over the scalp, a quick blow dry with a round brush, and I’m ready to go (this technique gives awesome volume as seen in my photo). Smells great, has clean ingredients, does everything it promises it will do and more! It’s a permanent resident in my beauty routine from now on. Can’t wait to see how it enhances and encourages growth as time goes by.
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 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!
Really happy with this product! I’ve never purchased a hair serum before but love adding this to my daily routine.
Thank you so much! We love to hear this!



