4.4

Rated 4.4 out of 5 stars

4.4 | 96 reviews

Re:GRO Anti-Thinning Shampoo

Name: Re:GRO Anti-Thinning Shampoo
Brand: California Naturals
Price: 11.99 USD
Availability: InStock
Rating: 4.4 (96 reviews)

STRONGER HAIR FROM ROOT TO TIP • 16.5 oz / 468 g

A daily cleanse powered by scalp-nourishing botanicals for longer, stronger hair you can feel.

Vegan

Cruelty Free

Sulfate & silicone free

Paraben & phthalate free

No artificial fragrance

No synthetic dyes

Re:GRO Anti-Thinning Shampoo gently cleanses while nourishing both scalp and strands to help reduce breakage, flakes, and thinning over time. Designed to support a healthy scalp environment, the lightweight formula delivers essential nutrients that strengthen hair from root to tip without weighing it down.

Formulated with Rosemary to stimulate follicles and support growth, Zinc to help reduce flakes and balance the scalp, Caffeine to energize the scalp and reduce thinning, Biotin (Vitamin B7) to strengthen strands and minimize breakage, and Saw Palmetto to help block DHT and reduce shedding. Safe for color-treated and chemically treated hair and ideal for daily use as the foundation of your Re:GRO routine.

Rosemary Oil
Nourishes the scalp & strengthens strands while protecting against split ends & breakage

Biotin & Caffeine
A dream duo that kicks slow-growing scalps into gear while strengthening fine, brittle strands

Saw Palmetto & Zinc
Help block DHT—the hormone linked to hair loss—while balancing the scalp

Topical Probiotics & Argan Oil
Support the scalp's microbiome & hydrate without heaviness

Aqua/Water/Eau, Aloe Barbadensis Leaf Juice*, Cocamidopropyl Hydroxysultaine (Coconut Derived), Sodium Methyl 2-Sulfolaurate (Coconut Derived), Disodium 2-Sulfolaurate (Coconut Derived), Sodium Lauroyl Methyl Isethionate (Coconut Derived), Glycerin, Ricinus Communis (Castor) Seed Oil*, Cucurbita Pepo (Pumpkin) Seed Oil, Nigella Sativa Seed Oil, Argania Spinosa (Argan) Kernel Oil*, Persea Gratissima (Avocado) Oil, Biotin, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract*, Urtica Dioica (Nettle) Extract, Zinc Gluconate, Caffeine, Saccharomyces/Xylinum/Black Tea Ferment, Serenoa Serrulata Fruit Extract, Panthenol (Vitamin B5), Lactobacillus Ferment (probiotic), Adenosine, Potassium Sorbate, Sodium Benzoate, Ethylhexylglycerin, Lactic Acid (vegan), Guar Hydroxypropyltrimonium Chloride, Triethyl Citrate

*Certified Organic Ingredient

SEE ALL SEE LESS

An earthy blend of rosemary, lavender, and clary sage, like your hands after you’ve been in a garden. A scent that lingers but lets you shine.

With notes of:

Rosemary
Lavender
Clary Sage
Tarragon
Lemongrass

Our fragrances are formulated with up to 94% natural ingredients per ISO 16128 and are gentle enough for even the most sensitive scalps & skin.

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

Zinc helps reduce flakes and balance your scalp. Caffeine energizes follicles to encourage growth and reduce thinning. Biotin strengthens strands and promotes growth, while Saw Palmetto helps block DHT to keep hair stronger, longer.

Ideal for thinning hair, weak or brittle strands, stress- or postpartum-related shedding*, or anyone starting a scalp care routine. Safe for color-treated and chemically treated hair. *If you pair with Re:GRO™ Scalp Serum, consult your doctor if you are pregnant or breast feeding.

Actually clean. 99% naturally derived, sulfate, paraben, and silicone-free. Vegan, cruelty-free, and free from irritants, hormone disruptors, toxins, and synthetic fragrance.

Yes—only the scent differs. Women’s: Rosemary with sweet eucalyptus and garden basil undertones. Men’s: Fresh herbs with rosemary, basil, and nettle. Both are clean, vegan, and cruelty-free, with zero junk.

Works with any conditioner, but we pair with Re:GRO™ Anti-Thinning Conditioner and Re:GRO™ Anti-Thinning Scalp Serum for best results. In a 90-day clinical study, 97% of participants reported less breakage and shedding.*

*Clinical Study: 30+ panelists used Re:GRO™ Scalp Serum, Re:GRO™ Shampoo & Re:GRO™ Conditioner for 90 Days. Third Party Verified Clinic. USA 2025.

NO ARTIFICIAL FRAGRANCE OR SYNTHETIC DYES

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% NATURALLY DERIVED INGREDIENTS

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

MADE WITH 100% PCR PLASTIC

99% NATURALLY DERIVED INGREDIENTS

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

MADE WITH 100% PCR PLASTIC

99% NATURALLY DERIVED INGREDIENTS

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

MADE WITH 100% PCR PLASTIC

99% NATURALLY DERIVED INGREDIENTS

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

MADE WITH 100% PCR PLASTIC

99% NATURALLY DERIVED INGREDIENTS

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

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!

Olivia R.

deep repair hair mask

My hair drank them up!!

first time trying the California Naturals Super Moisture shampoo and conditioner. I’ve loved the body wash all summer and these are just as good. My hair drank them up!! I noticed a difference in the manageability and bounce, love the INCIs and the earthy fruity scent that’s so unique. Also these are SUPER affordable!!

@Dianamary126

Super Moisture Shampoo & Conditioner

INSTAGRAM

Changed my hairline!

I've been using this product for a few weeks now and I'm really happy with the results. It's made my hair look and feel healthier.

Olivia R.

deep repair hair mask

3 months ago

OBSESSED with these affordable gems

I am OBSESSED with these affordable gems from Target! These products have transformed my wash and go game. Anyone who asks about great natural hair care products, my answer is always California Naturals -10/10 recommend!

@chrissynatural_beauty

2-in-1 Shampoo & Body Wash

Instagram

Worked really well on my 4C hair

These California Naturals products smell so good and worked really well on my 4C hair, which is not always the case when I try new hair products. Felt really soft after using these. Safe to say it works for all hair types and it’s super affordable.

@kyrahthecreative

Classic Clean shampoo & conditioner

TIKTOK

IT'S ALL GOOD

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

WOMEN FOUNDED & LED

SULFATE, PARABEN, & SILICONE FREE

PCR PLASTIC BOTTLES

for all hair types

MIXED & POURED IN CALIFORNIA

vegan & cruelty free

Learn more

4.4

Rated 4.4 out of 5 stars

Based on 96 reviews

Total 5 star reviews: 56 Total 4 star reviews: 29 Total 3 star reviews: 6 Total 2 star reviews: 4 Total 1 star reviews: 1

95%would recommend this product

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96 reviews

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DM
Dana M.
Verified Reviewer
1 year ago
Rated 5 out of 5 stars
My Go-To Shampoo
This has become my go-to shampoo! Not only does it smell amazing but it actually delivers on what it says it does...I have not had that much hair fall/ shedding since using this product ( a little over a month), my hair strands feel stronger and most importantly for me, my hair has more volume. Overall, my hair appears healthier (shiny, no frizz, volume). Highly recommend!
Featured
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K
kelseyausland
Verified Buyer
5 days ago
Rated 5 out of 5 stars
Smells amazing
This smells amazing and seems to be helping with my thinning
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M
mmontoya3800
Verified Buyer
5 days ago
Rated 5 out of 5 stars
Less thinning
I struggle with hair loss and with just one bottle I'm noticing my hair isn't losing volume and it looks like some baby hairs might be coming in!
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L
lisamfaucher
Verified Buyer
5 days ago
Rated 4 out of 5 stars
Promising!
I received this product for free in exchange for a review. I only wash my hair every 2-3 days, so I have only used this a handful of times and it may be too soon to tell, but I have noticed a tiny bit more hair growth from the baby hairs on the side of my hairline! The product also has a natural smell and lathers up well. You get a ton of product for retail price. I would be interested to try the conditioner and serum as well!
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S
shawneekess
Verified Buyer
5 days ago
Rated 4 out of 5 stars
Great shampoo
This shampoo is very good. The mixture between easy to use and the smell is great. I am happy I was able to try it .i will probably buy it in the future
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L
lowlabunne
Verified Buyer
1 week ago
Rated 5 out of 5 stars
Very impressed with this shampoo
This is my first time ever trying a product from California Naturals and I was actually very impressed. I tried the Re:Gro shampoo and so far I love it. This shampoo suds up very well and feels nice and tingly on my scalp. I feel like it does a better job at getting my scalp clean than other shampoos. The rosemary scent is very refreshing and herbal. I also like that this shampoo is sulfate, silicone, and paraben free. After using this my hair looks very clean and is soft, smooth, and shiny. I am not sure if it helps with hair growth yet, but I am sure that will require continuous use. Still I am very pleased with this shampoo and would definitely purchase it again in the future.
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K
kaylateeple01
Verified Buyer
1 week ago
Rated 3 out of 5 stars
Overall Decent Shampoo
I've been using Gro Shampoo for a little while now, and it's been okay. It has a nice scent, lathers well, and leaves my hair feeling clean without being overly drying. I haven't noticed any major changes in hair growth or thickness yet, but it seems like a decent everyday shampoo. Overall, it's a solid product, but I think it takes time to see if the long-term benefits are worth it.
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A
ashleycraftscreations
Verified Buyer
1 week ago
Rated 5 out of 5 stars
Recommend
I love this shampoo ... mainly because I love rosemaryyyyy the scent just gives nature .... it got my hair so soft... if you love the scent of rosemary get this shampooo
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