Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
Re:GRO Anti-Thinning Scalp Serum
4.7
Rated 4.7 out of 5 stars
71
4.7 | 71 reviews

Re:GRO Anti-Thinning Scalp Serum

For Visibly Less Shedding, Stronger Strands, Fuller Hair*  • 3.0 oz / 85 g

A clean, concentrated scalp serum clinically tested* to reduce breakage and support fuller, stronger-looking hair—without harsh or mystery chemicals.
Supports stronger, fuller-looking hair*
Supports stronger, fuller-looking hair*
Energizes follicles and reduces breakage
Energizes follicles and reduces breakage
Nourishes scalp for healthier-looking hair
Nourishes scalp for healthier-looking hair
DETAILS

Re:GRO Anti-Thinning Scalp Serum strengthens hair from root to tip while helping visibly improve fullness and reduce shedding over time. The lightweight formula stimulates the scalp and delivers an instant root-lifting effect for thicker-looking hair, without buildup or irritation.

Powered by 5% Capixyl®, caffeine, biotin, rosemary, and saw palmetto, this targeted treatment supports healthier strands and a more balanced scalp. Designed for thinning hair, early signs of hair loss, breakage-prone strands, and stressed scalps—including postpartum or tension-related shedding. Safe for color-treated and chemically treated hair, as well as extensions.

*Clinically tested: 97% saw less breakage and stronger strands with continuous use. Based on a 90-day third-party clinical study using Re:GRO Scalp Serum, Shampoo, and Conditioner.
KEY INGREDIENTS

• 5% Capixyl® – Clinically shown to spark new growth and strengthen thinning hair.
• Caffeine – Like coffee for your scalp—wakes up follicles and boosts circulation.
• Biotin – Strengthens strands and reduces brittleness for healthier hair.
• Botanical Oils – Rosemary, Castor, and Pumpkin Seed nourish the scalp and promote fullness.
• Saw Palmetto – Helps block DHT (shedding hormone) to keep hair stronger, longer.
• Silica (from rice) - Helps to lift roots and give you an instant thickness boost

Aqua/Water/Eau, Capixyl™, Aloe Barbadensis Leaf Juice, Panthenol (Vitamin B5), Biotin, Caffeine, Rosmarinus Officinalis (Rosemary) Leaf Oil1, Adenosine, PhytoCellTec™, Cucurbita Pepo (Pumpkin) Seed Oil, Serenoa Serrulata Fruit Extract, Malus Domestica Fruit Cell Culture Extract, 1, 2-Hexanediol, Caprylyl Glycol, Xanthan Gum, Sodium Benzoate, Ricinus Communis (Castor) Seed Oil, Silica, Ethylhexylglycerin, Caprylyl/Capryl Glucoside, Carbomer

SEE ALL SEE LESS
SCENT

Fragrance Free. Our clean formula may have a subtle scent from naturally derived, food-grade ingredients. Vegan and cruelty-free, with zero junk - no parabens, phthalates, preservatives, or synthetic fragrance and dyes. Just smells you’d actually find in nature.
HOW TO USE

After cleansing with Re:GRO™ Anti-Thinning Shampoo & Conditioner, towel dry. Apply the serum directly to your scalp using the applicator in even lines, front to back or side to side. Massage with fingertips to cover the scalp. Glides on easy with a breezy, cooling finish—no rinse needed. Use 4x per week for 12 weeks for best results.
SHIPPING & RETURNS

Enjoy free shipping on all orders over $40. Orders ship on business days, with 2 to 3 days for processing and 5 to 7 days for delivery.

We offer free returns within 30 days. Items must be unopened and in their original packaging.

Complete the Routine

Classic Clean Conditioner

Classic Clean Body Wash

Frequently Asked Questions

What results will I see instantly vs. over time?

Instantly: your scalp feels refreshed and energized, and hair looks lifted at the roots. Over time: with regular use 4x/week for 12 weeks, hair appears thicker, stronger, and more resilient, with reduced shedding and breakage.
Who is this for?

This serum is great for thinning hair, weak or brittle strands, stress- or postpartum-related shedding, or tension from tight hairstyles like braids, buns, or ponytails. Perfect if you’re starting a scalp care routine and safe for color-treated, chemically treated hair, and extensions.*

*Consult your doctor if pregnant or breastfeeding.
What’s the difference between the Women’s and Men’s Scalp serum?

 It's the same formula. We made the best serum we possibly could and it works for everyone. We just offer it in men's and women's versions because that's how most people shop, but the actual product is identical. Same great results across the board!
How clean is this formula?

Actually clean. Really natural. Totally transparent. This serum is 98% naturally derived and free from irritants, hormone disruptors, toxins, and synthetic fragrance.
How does it help with hair strength and shedding?

Key ingredients like 5% Capixyl®, caffeine, biotin, saw palmetto, and botanical oils help nourish the scalp, support stronger follicles, reduce shedding, and give hair a fuller, healthier look over time. In a 90-day clinical study, 97% of participants reported less breakage and shedding.*
Can it be used with any wash routine?

Yes! It works with any shampoo and conditioner, but for best results, we recommend pairing it with our Re:GRO™ Anti-Thinning Shampoo & Conditioner. Lightweight and non-sticky, it won’t weigh hair down and suits all hair types.
NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES
FOR ALL HAIR TYPES
CRUELTY-FREE (LEAPING BUNNY CERTIFIED)
SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE
98% CLEAN, NATURALLY DERIVED INGREDIENTS
MADE WITH RECYCLED PLASTIC
SAFE FOR COLOR TREATED HAIR
NATURALLY SCENTED
VEGAN
NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES
FOR ALL HAIR TYPES
CRUELTY-FREE (LEAPING BUNNY CERTIFIED)
SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE
98% CLEAN, NATURALLY DERIVED INGREDIENTS
MADE WITH RECYCLED PLASTIC
SAFE FOR COLOR TREATED HAIR
NATURALLY SCENTED
VEGAN
NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES
FOR ALL HAIR TYPES
CRUELTY-FREE (LEAPING BUNNY CERTIFIED)
SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE
98% CLEAN, NATURALLY DERIVED INGREDIENTS
MADE WITH RECYCLED PLASTIC
SAFE FOR COLOR TREATED HAIR
NATURALLY SCENTED
VEGAN
NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES
FOR ALL HAIR TYPES
CRUELTY-FREE (LEAPING BUNNY CERTIFIED)
SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE
98% CLEAN, NATURALLY DERIVED INGREDIENTS
MADE WITH RECYCLED PLASTIC
SAFE FOR COLOR TREATED HAIR
NATURALLY SCENTED
VEGAN
NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES
FOR ALL HAIR TYPES
CRUELTY-FREE (LEAPING BUNNY CERTIFIED)
SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE
98% CLEAN, NATURALLY DERIVED INGREDIENTS
MADE WITH RECYCLED PLASTIC
SAFE FOR COLOR TREATED HAIR
NATURALLY SCENTED
VEGAN

KIND WORDS

What they said

Switched from Native!

I had to restock with your brand because it's sooo good!! Switched from Native shampoo/cond and loving California Naturals!!

@LILYSLOCALE

CLASSIC CLEAN SHAMPOO & CONDITIONER

INSTAGRAM

IT'S ALL GOOD

We’re California Naturals.
Clean, natural, everyday essentials that actually work.

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WOMEN FOUNDED & LED

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SULFATE, PARABEN, & SILICONE FREE

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PCR PLASTIC BOTTLES

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for all hair types

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MIXED & POURED IN CALIFORNIA

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vegan & cruelty free

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4.7
Rated 4.7 out of 5 stars
Based on 71 reviews
Total 5 star reviews: 52 Total 4 star reviews: 16 Total 3 star reviews: 2 Total 2 star reviews: 0 Total 1 star reviews: 1
96%would recommend this product
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71 reviews
  • L
    LyssLyss52
    Verified Buyer
    6 months ago
    Rated 5 out of 5 stars
    Great growth serum for color treated hair! All natural!!

    I always am weary of introducing new hair products since i dye my hair, but I do have breakage from the bleach. This serum is great! I use it when I do my slick backs, but it's not too sticky so you could use it on your cleaner hair days. I haven't seen too much growth yet as it's only been a few weeks, but I will continue to use it since it's so simple! I also have a friend who just finished chemo, and she's looking for clean products. Since this is all natural, she's also giving it a try!

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  • O
    Olivia
    11 months ago
    Rated 5 out of 5 stars
    Changed my hairline!!!

    I've struggled with hair thinning & loss around my hairline, and using this a few times per week has completely changed the game for my hair growth around my hairline. It's thicker, and I've seen re-growth even in the bald spots! Having something affordable and effective is SO hard to find and this actually worked. Be sure to keep up with it and you will see results!

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  • A
    amberramirez914
    Verified Buyer
    Yesterday
    Rated 5 out of 5 stars
    Too early to tell, but…

    It definitely smells and feels pretty great! I think it's too early to tell if it'll help regrow hair, but it feels like something is doing some magic for sure!

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  • T
    tracixo23
    Verified Buyer
    Yesterday
    Rated 5 out of 5 stars
    Great product so far!

    First off I love that the ingredients are natural! I like to use more natural products where I can. This serum isn't heavy and greasy like others can be which makes it great to use everyday. I haven't used to long enough to see actual hair growth but I have high hopes for it! (Submitted as part of a free sample program)

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  • C
    christinadugazon885
    Verified Buyer
    Yesterday
    Rated 4 out of 5 stars
    Love the refreshing feeling it leaves on my scalp

    I've really been enjoying this product so far. It's a scalp serum that's designed to help promote thicker, healthier-looking hair. Since I started using it, I've noticed my scalp has been itching a lot. At first I wasn't sure if it was because my hair needed to be washed, but my scalp wasn't itching like this before I started using the serum. I'm hoping that's a sign that it's working! I've applied it both on freshly washed hair and in between wash days. One thing I really love is how refreshing it feels on my scalp. It has a nice cooling sensation that makes my scalp feel clean and revitalized, and it's also super easy to apply. I received the mini size, so I'm not sure how long a full bottle would last. If I used it every single day, I think this travel-size bottle would probably last about two weeks. Since I've been using it every other day or on and off, I still have a good amount left, which I'm happy about. Overall, I'm satisfied with the product so far. I would definitely consider purchasing the full-size version, especially because of how refreshed my scalp feels after each use. I'm going to keep using it to see if I notice my hair becoming thicker over time, but my first impression has been very positive.

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  • F
    florchavez1981
    Verified Buyer
    Yesterday
    Rated 5 out of 5 stars
    Amazing

    This product is good for the hair! It leads to hair growth and more fuller and voluminous hair I saw this on TikTok and gave it a shot and I'm actually impressed. Big points for it being fragrance free and not giving off that burning feeling on your scalp Makes my hair feel smooth, and soft. Expecting product to promote hair growth I'm using it everyday.

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  • B
    brianna.kolb
    Verified Buyer
    2 days ago
    Rated 5 out of 5 stars
    Feels nice

    I like to use hair growth serums to help fill in areas that get thin in my hair. They do take time to work, so I can't speak to how well this is causing my hair to fill in, that'll take a few months, but I can say it feels nice. The formula is cooling so it leaves my scalp pleasantly tingly after I apply it. I am most excited about the fact that it doesn't make my hair greasy! So many hair serums make my hair oily but this doesn't. I'll definitely use this entire bottle and I also purchased the shampoo and conditioner to use with it.

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  • I
    itzelgonzalez1993
    Verified Buyer
    1 week ago
    Rated 5 out of 5 stars
    Really good hair growth serum

    I've had a good week using this serum, and I have already noticed some changes & improvement with my hair. I'm not the biggest fan of the scent, but I've managed to look past that, due to the growth and health of my hair.

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