Grow Potion
Buy 3+ & SAVE 10%
Grow Potion 2 in 1 Applicator
Buy 3+ & SAVE 10%
Effect of using GrowPotion in 12 weeks
Buy 3+ & SAVE 10%
12 weeks difference in visibly overplucked brows
Buy 3+ & SAVE 10%
Improves the appearance of lash volume in 12 weeks
Buy 3+ & SAVE 10%
Clinically proven results after 12 weeks of using GrowPotion
Buy 3+ & SAVE 10%
How to use GrowPotion
Buy 3+ & SAVE 10%
GrowPotion Safety Tested
Buy 3+ & SAVE 10%
GrowPotion Benefits and Ingredients
Buy 3+ & SAVE 10%
Manifest your best brows and lashes
Buy 3+ & SAVE 10%
GrowPotion VS. Other Brow + Lash Serums
Buy 3+ & SAVE 10%
GrowPotion Dos and Don'ts
Buy 3+ & SAVE 10%

    GrowPotion

    103 total customer reviews

    Fluffy Brow + Lash Boosting Serum

    Buy 3+ & Save 10%
    Free Shipping on US Orders $50+Free Returns and Exchanges
    Save with Sets
    Build-Your-Own Kosas Kit

    Customize Your Kit of 3 Full-Size Products

    Manifest Your Best Brows + Lashes.
    Clean 2-in-1 brow and lash boosting serum powered by peptides and vegan keratin that accelerates the appearance of fuller, feathery brows and longer, thicker lashes. Safe for sensitive eyes. Prostaglandin-free.

    Show More - read the full product description
    • Review: 5 out of 5

      “After using each night for just a couple of weeks I can actually see new growth and my wild looking brows are now tame and in place.”

      Christa

    • Review: 5 out of 5

      “It absorbs well, and doesn’t bother my eyes. I am starting to see a difference in the quality of my lashes and brows.”

      Lisa

      Full Brow Support

      GrowPotion Tonight, Brow Team Tomorrow

      GrowPotion
      Treat

      Fluffy Brow + Lash Boosting Serum

      Brow Pop
      DEFINE + SHAPE

      Dual-Action Defining Pencil

      Select $26
      Air Brow - Tinted
      Fluff + tint

      Volumizing Treatment Gel

      Select $26
      Air Brow - Clear
      LIFT + SET

      Lifting Treatment Gel

      You might also like

      Frequently Asked Questions

      You've got questions, we've got answers

      Can I skip nights?

      For best results, use GrowPotion nightly. Consistency is key.

      Can I use GrowPotion if I wear contacts?

      Yes, this product was tested to be safe for contact lens wearers.

      Can I use this product with lash extensions?

      Yes! GrowPotion does not contain oils or solvents and won’t interfere with lash adhesives.

      Does the product have any scent? 

      No, GrowPotion is completely fragrance free.

      How long do results last?

      Results vary, but to maintain fuller brows and lashes, continue using GrowPotion every night.

      Is GrowPotion vegan?

      Yes! GrowPotion is 100% vegan and cruelty-free.

      When will I see results?

      Results vary by individual. In an expert-graded study, 97% of subjects saw clinically measured improvement in brow length and lash volume within 12 weeks.* Brow results often appear sooner than lashes due to different hair growth cycles.

      Where does this go in my routine? Before or after skincare?

      Apply after cleansing and skincare. Wait 1–2 minutes for your skin to dry, then use a thin layer along the root of your upper lash line and on brows. Only 1 dip per lash/brow is needed—little goes a long way. Stay consistent and apply everyday (you can do it!).

      Will this irritate my eyes?

      GrowPotion is ophthalmologist tested, hypoallergenic, and safe for sensitive eyes. It is important to apply only a thin layer to brows and lashes, and avoid applying near the inner corner and inside the water line. If you experience irritation, please discontinue use and contact us.

      How long should i continue using growpotion once i reach my desired results?

      To maintain your results, keep applying nightly. Hair naturally sheds over time, so ongoing use helps preserve fuller brows and lashes!

      Ask our Kosas Team Need help finding your shade? Question about a product?
      Customers say this brow and lash serum shows mixed results. Many report seeing fuller brows and longer lashes after consistent use, while others experience no changes. The applicator receives praise for ease of use, though some note it can leave a flaky residue. Several mention the product works best when applied at night. Some users appreciate its gentle formula, while others report eye irritation or lash shedding. Reviews indicate results typically take several weeks to appear.
      3.5
      Rated 3.5 out of 5 stars
      Based on 103 reviews
      Total 5 star reviews: 42 Total 4 star reviews: 17 Total 3 star reviews: 17 Total 2 star reviews: 9 Total 1 star reviews: 18
      57%would recommend this product
      Slide 1 selected
      Customers Talked About
      103 reviews
      • H
        Heather
        2 months ago
        Rated 5 out of 5 stars
        5 Stars

        Oh dear. I am sad they are discontinuing this amazing product. I got three.

      • A
        Amber
        3 months ago
        Rated 5 out of 5 stars
        5 Stars

        The scent is not very strong, which is good. Hard to use on lashline but great for the brows!

      • S
        Sari
        Verified Buyer
        Age Range 25 - 34
        Recommend Yes -1000%
        6 months ago
        Age Range 25 - 34
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        truly works

        It works! no eyelid redness. I've tried a lot.

      • LK
        Lynn K.
        Verified Buyer
        Age Range 65+
        Hair Color Brown
        Skin Tone Medium
        Skin Type Dry
        Recommend Yes -1000%
        7 months ago
        Age Range 65+
        Hair Color Brown
        Skin Tone Medium
        Skin Type Dry
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        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!

      • MC
        Michelle C.
        Verified Buyer
        Age Range 35 - 44
        Hair Color Black
        Skin Tone Medium
        Skin Type Normal
        Recommend Yes -1000%
        7 months ago
        Age Range 35 - 44
        Hair Color Black
        Skin Tone Medium
        Skin Type Normal
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        Really happy with results

        I started using the grow potion right after I did my last round of chemo. My brows were in a really bad place and it made me self conscious about my looks. After 12 weeks I am very happy with the results! I have brows again!

      • G
        G
        8 months ago
        Rated 5 out of 5 stars
        5 Stars

        My second tube… brows are beginning to look fuller! Will stick with it.

      • PB
        Patty B.
        Verified Buyer
        Age Range 65+
        Astrology Fire — Aries; Leo; Sagittarius
        Hair Color Red
        Skin Tone Fair
        Skin Type Dry
        Recommend Yes -1000%
        9 months ago
        Age Range 65+
        Astrology Fire — Aries; Leo; Sagittarius
        Hair Color Red
        Skin Tone Fair
        Skin Type Dry
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        This really works!

        As I’ve gotten older my eyebrows have thinned out. Nothing worked until now. My eyebrows have grown noticeably thicker.

        This really works!

      • B
        Brianna
        1 year ago
        Rated 5 out of 5 stars
        5 Stars

        I am so excited to try this

      • ES
        Erika S.
        Verified Buyer
        Age Range 35 - 44
        Hair Color Brown
        Skin Type Combination
        Recommend Yes -1000%
        1 year ago
        Age Range 35 - 44
        Hair Color Brown
        Skin Type Combination
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        Thank you!

        This is really working for me!

      • KL
        Katalina L.
        Verified Buyer
        Age Range 55 - 64
        Astrology Fire — Aries; Leo; Sagittarius
        Hair Color Blond
        Skin Tone Light
        Skin Type Dry
        Recommend Yes -1000%
        2 years ago
        Age Range 55 - 64
        Astrology Fire — Aries; Leo; Sagittarius
        Hair Color Blond
        Skin Tone Light
        Skin Type Dry
        Recommend Yes -1000%
        Rated 5 out of 5 stars
        This stuff works!

        I've been using Grow Potion for several months and my brows have thickened and my lashes are so long.

      Your Bag

      0 Items  are in your cart

      Your Cart is Empty

      Let us help!
      What are you looking for?

      Shop All Products

      Free Shipping on US Orders $50+ & Free Returns

      Recommended for you

       

       

       
       

       

       

      Choose Your Shade