4.5

Rated 4.5 out of 5 stars

4.5 | 46 reviews

Re:GRO Anti-Thinning Shampoo

For Fullness & Length • 16.5 oz / 468 g

A clean, scalp-boosting shampoo powered by Biotin, Caffeine, Zinc, Rosemary, and Saw Palmetto to strengthen strands, support scalp health, and promote fuller-looking hair—without harsh ingredients.

Helps strengthen & reduce breakage

Helps nourish scalp & reduce flakes

Helps balance your scalp

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 - Stimulates follicles, promotes scalp health & hair growth
Zinc - Reduces flakes, balances scalp environment
Caffeine - Stimulates scalp, encourages growth, reduces thinning
Biotin (Vitamin B7) - Strengthens strands, reduces breakage & brittleness
Saw Palmetto - Blocks DHT to reduce shedding & fallout

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

Fresh rosemary with sweet eucalyptus and garden basil undertones. Totally clean, vegan, and cruelty-free, with zero junk—no parabens, phthalates, preservatives, or synthetic fragrance and dyes. Just smells you’d actually find in nature.

Lather a quarter-size (or more!) dollop between palms and massage in, concentrating on your scalp and roots. Let it sit for 1-2 mins. Rinse. Follow with Re:GRO™ Anti-Thinning Conditioner to complete the magic.

Standard shipping is $9, and free shipping for orders of $40 or more. Our orders are shipped and delivered on business days (Monday through Friday, excluding major holidays.) Orders placed after Friday at 12:00 PM PST will be shipped the following business week. Our standard shipping carrier is UPS. We kindly ask that you anticipate 1-2 days of processing your order and 4-10 business days for standard shipping once processed.

Re:GRO Anti-Thinning Scalp Serum

Re:GRO Anti-Thinning Conditioner

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 SYNTHETIC FRAGNANCE

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% CLEAN, NATURALLY DERIVED INGREDIENTS

SAFE FOR COLOR TREATED HAIR

NATURALLY SCENTED

NO SYNTHETIC FRAGNANCE

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% CLEAN, NATURALLY DERIVED INGREDIENTS

SAFE FOR COLOR TREATED HAIR

NATURALLY SCENTED

NO SYNTHETIC FRAGNANCE

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% CLEAN, NATURALLY DERIVED INGREDIENTS

SAFE FOR COLOR TREATED HAIR

NATURALLY SCENTED

NO SYNTHETIC FRAGNANCE

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% CLEAN, NATURALLY DERIVED INGREDIENTS

SAFE FOR COLOR TREATED HAIR

NATURALLY SCENTED

NO SYNTHETIC FRAGNANCE

FOR ALL HAIR TYPES

CRUELTY-FREE (LEAPING BUNNY CERTIFIED)

SULFATE, SILICONE, PARABEN, HORMONE DISRUPTOR & PHTHALATE FREE

MADE WITH 100% PCR PLASTIC

99% CLEAN, NATURALLY DERIVED INGREDIENTS

SAFE FOR COLOR TREATED HAIR

NATURALLY SCENTED

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

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Clean hair, no junk. It’s All Good.

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Re:GRO Anti-Thinning Shampoo

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