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GrowPotion Fluffy Lash + Brow Boosting Serum

Kosas

Current Price $48.00
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Highlights

  • Cruelty-free
  • Vegan
  • Hyaluronic acid

Details & care

What it is: A brow- and lash-boosting serum powered by peptides and vegan keratin to accelerate the appearance of fuller, feathery brows and lashes.

What it does: Featuring a unique two-in-one applicator to maximize both your brows and lashes, this serum creates the perfect environment for hair to thrive with a clean, 97% naturally derived, hyaluronic acid-powered formula with vegan keratin and a trio of peptides.

How to use: Apply nightly. Use flatter side of applicator to coat entire brow area. Angle the pointed tip to apply along top lash line. Avoid applying near inner-eye corner or inside waterline. Start with clean, dry face and wait one to two minutes for serum to dry. Apply a thin layer to the roots of upper lash line. Only use one dip of serum for each brow and lash. Don't apply makeup immediately after. Don't apply serum to bottom lashes.

  • 0.11 oz.
  • Natural Beauty & Wellness products are free of sulfates, phthalates, parabens, petrochemicals, mineral oil, silicone and talc; also free of prostaglandin and fragrances.
  • Cruelty-free
  • Vegan
  • Made in the USA
  • Item #7380838

Ingredients

Water (Aqua), Pullulan, Propanediol, Glycerin, Butylene Glycol, Sorbitol, Pentylene Glycol, Xanthan Gum, Dextran, Sodium Hyaluronate, Panthenol, Soy Amino Acids, Wheat Amino Acids, Arginine HCl, Serine, Threonine, Trehalose, Acetyl Tetrapeptide-3, Biotinoyl Tripeptide-1, Myristoyl Pentapeptide-17, Trifolium Pratense (Clover) Flower Extract, Citric Acid, Dextran, Sodium Gluconate, Acacia Senegal Gum, Phenethyl Alcohol, Potassium Sorbate, Sodium Benzoate, Ethylhexylglycerin, Benzoic Acid, 1,2 Hexanidiol, Caprylyl Glycol.
Ingredients are subject to change at the manufacturer's discretion. For the most complete and up-to-date list of ingredients, refer to the product packaging

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Kosas

Reviews

(96)
3.6 out of 5
Write a Review

Most helpful positive review

Nov 16, 2022
works fast
This serum works amazing without any irritation at all! U have to be careful on your kids not to put too much on with the wand, but otherwise it works so good! And it contains no prostaglandin! Which is what irritates me! Great product! I’m hooked!
bonnie83
Verified purchase
5found this helpful

Most helpful critical review

Dec 15, 2025
Does not work
Been trying it for over 6 months. Does nothing. Waste of money.
Marta
Reposted from Kosås Cosmetics, LLC
5 stars
40%
4 stars
21%
3 stars
13%
2 stars
9%
1 star
18%

Pros:

Cons:

Current reviews don’t mention any.
Sort by Most Helpful
bonnie83
Verified purchase
Size purchased: One Size
Nov 16, 2022
works fast
This serum works amazing without any irritation at all! U have to be careful on your kids not to put too much on with the wand, but otherwise it works so good! And it contains no prostaglandin! Which is what irritates me! Great product! I’m hooked!
5found this helpful
nana_rea
Reposted from spacenk.com
Apr 5, 2026
Hopeful…..
I’ve been using this on my eyelashes only, my eyebrows are a law unto themselves and should not be encouraged. I’ve been applying this at night for about a week now, I feel that my eyelashes look thicker and more substantial. Will continue using. It’s easy to apply and once it’s dried you wouldn’t know it is there.
Sparse brow girly
Reposted from spacenk.com
Feb 2, 2026
Actually works!
Have been using on and off for a few months but after every use I notice growth in what used to be a bald spot in my eyebrows (for my entire life) so I’m really impressed with the product. I applied some last night (have been using consistently for like a few days now), and my mum said she can notice the hairs growing in the sparse area, so it’s not even me being delusional haha
flot
Reposted from spacenk.com
Jan 4, 2026
Not siure
his brow treatment helps improve the look of brow fullness. The texture feels lightweight and easy to apply. Brows appear healthier with consistent use. It layers well with other brow products. The formula does not feel stiff or sticky. It supports a natural groomed look.
Marta
Reposted from Kosås Cosmetics, LLC
Dec 15, 2025
Does not work
Been trying it for over 6 months. Does nothing. Waste of money.
Lynn K.
Reposted from Kosås Cosmetics, LLC
Oct 2, 2025
Great Product
As an older woman, my once thick and dark eye brows have faded and thinned out. This growth serum has added brow hairs especially in sparse areas. It’s a slow process but after 12 weeks I’ve noticed a difference. I still use brow tint with texture but now it’s an easier process grabbing brow hairs and bringing back darker and fuller brows!
Load 6 more reviews
GrowPotion Fluffy Lash + Brow Boosting Serum
Kosas
Current Price $48.00