California Naturals Re:GRO Anti-Thinning Shampoo — 20 fl oz Biotin & Caffeine Formula, Sulfate-Free Scalp Support

Re:GRO Anti-Thinning Shampoo is a scalp-targeted, sulfate-free formula that combines biotin, caffeine and rosemary oil to strengthen hair, reduce breakage and support a healthier scalp over time.

This 20 fl oz bottle from California Naturals is designed to address hair thinning and fragile strands with a blend of botanical and scientifically familiar actives. The formula focuses on scalp health and follicle support while avoiding sulfates, parabens, silicones and phthalates. It also includes nourishing oils and supporting ingredients such as zinc, probiotics and saw palmetto to balance the scalp environment and improve strand resilience. The scent is derived naturally from rosemary, eucalyptus and basil for a fresh, herbal finish.

How does this shampoo help reduce breakage and strengthen hair?

The shampoo combines biotin and plant-based strengthening agents to fortify hair shafts and make strands less prone to snapping. Conditioning oils and protein-supporting ingredients work together to improve elasticity and surface smoothness, so hair handles styling and brushing with fewer split ends.

• Biotin helps support keratin structure for stronger strands.
• Castor and argan oils add moisture and shine while reducing brittleness.
• Sulfate- and silicone-free base prevents stripping and buildup.

Will this product help the scalp and support follicles?

This formula targets the scalp with rosemary oil and caffeine to invigorate the surface and create a supportive environment for follicles. Zinc and probiotics are included to help balance the scalp microbiome and reduce flakiness, promoting comfort and a cleaner foundation for hair to grow from.

• Rosemary oil traditionally used for stimulating scalp circulation.
• Caffeine helps energize the scalp surface to reduce signs of thinning.
• Zinc and probiotics encourage a balanced scalp environment.

Is the shampoo safe for color-treated hair and daily use?

Yes — the Re:GRO formula is formulated without harsh sulfates or silicones and is gentle enough for routine use on color-treated hair. The absence of common irritants and the inclusion of nourishing oils mean it cleanses while protecting color and reducing dryness from frequent washing.

• Sulfate-, paraben-, silicone- and phthalate-free for gentler cleansing.
• Suitable for daily use and safe on color-treated hair.
• Vegan, cruelty-free and Leaping Bunny certified.

What additional ingredients support hair health in this formula?

Alongside biotin, caffeine and rosemary, this shampoo contains saw palmetto, zinc, probiotics and hydrating oils to address multiple contributors to thinning and fragile hair. These choices aim to reduce breakage, add shine and create a healthier scalp environment without heavy synthetic additives.

• Saw palmetto for DHT-blocking support in topical formulations.
• Probiotics to help nourish a balanced scalp microbiome.
• Castor and argan oils to repair damage and boost luster.

Who is this for? Re:GRO Anti-Thinning Shampoo is intended for anyone noticing thinning, increased breakage or a fragile hair texture who prefers a plant-forward, clinically aware approach. It is recommended for women experiencing postpartum shedding, fine or brittle hair, and people who want a daily, color-safe cleanse that prioritizes scalp balance. Woman-founded and B Corp certified, the product suits users seeking cruelty-free, non-toxic haircare made in California.

Ingredients

Rosemary Oil