California Naturals Re:GRO Anti-Thinning Shampoo - 16.5 fl oz: Silicone-Free, Sulfate-Free, Contains Biotin, Contains Argan Oil
Analysis updated August 2026 · How Scout scores
At a glance
Summary
This shampoo features a sulfate-free and silicone-free formula, which is beneficial for maintaining scalp health and reducing irritation. It includes a variety of nourishing oils such as argan, avocado, and castor oil, which are known for their moisturizing and strengthening properties. The presence of biotin and panthenol further supports hair health, while the absence of harsh chemicals like SLS, parabens, and synthetic fragrances contributes to its high rating, despite being a processed product.
Key ingredients 29
Argania Spinosa (Argan) Kernel OilVery Good
Argan oil is highly valued for its moisturizing and nourishing properties. It helps to condition the hair, making it soft and shiny. It is rich in essential fatty acids and vitamin E.
Risks
May cause buildup if used excessively.
Benefits
Deeply conditions and adds shine to the hair.
Persea Gratissima (Avocado) OilVery Good
Avocado oil is rich in vitamins and fatty acids that nourish and moisturize the hair. It helps to strengthen hair and improve its elasticity. It is a natural oil that enhances the overall health of the hair.
Risks
May cause buildup if not rinsed thoroughly.
Benefits
Nourishes and strengthens hair, improving its texture.
Aloe Barbadensis Leaf JuiceGood
Aloe vera is known for its soothing and moisturizing properties. It helps to hydrate the scalp and hair, reducing dryness and irritation. It is a natural ingredient that is well-tolerated by most skin types.
Risks
Rarely, aloe vera can cause allergic reactions in sensitive individuals.
Benefits
Aloe vera provides hydration and can soothe an irritated scalp.
GlycerinGood
Glycerin is a humectant that attracts moisture to the hair and scalp. It helps to keep the hair hydrated and reduces dryness. It is a well-tolerated ingredient that enhances the moisturizing properties of the product.
Risks
Excessive use can lead to a sticky feeling on the hair.
Benefits
Helps maintain moisture balance in the hair and scalp.
Ricinus Communis (Castor) Seed OilGood
Castor oil is known for its conditioning and moisturizing properties. It helps to nourish the scalp and promote healthy hair growth. It is a natural oil that is rich in fatty acids.
Risks
May cause buildup if not rinsed properly.
Benefits
Provides deep conditioning and promotes hair health.
Cucurbita Pepo (Pumpkin) Seed OilGood
Pumpkin seed oil is rich in vitamins and fatty acids that nourish the hair and scalp. It helps to strengthen hair and reduce hair loss. It is a natural ingredient with beneficial properties for hair care.
Risks
May cause allergic reactions in sensitive individuals.
Benefits
Nourishes and strengthens hair, promoting healthy growth.
Nigella Sativa Seed OilGood
Black seed oil is known for its antioxidant and anti-inflammatory properties. It helps to soothe the scalp and promote healthy hair growth. It is a natural oil that is beneficial for overall hair health.
Risks
Potential for allergic reactions in sensitive users.
Benefits
Soothes the scalp and supports healthy hair growth.
BiotinGood
Biotin is a B-vitamin that is essential for healthy hair growth. It helps to strengthen hair and prevent breakage. It is commonly used in hair care products for its beneficial effects on hair health.
Risks
Excessive use can lead to skin irritation in some individuals.
Benefits
Supports healthy hair growth and reduces breakage.
TocopherolGood
Tocopherol, or vitamin E, is an antioxidant that helps to protect the hair from damage. It nourishes the scalp and promotes healthy hair growth. It is a beneficial ingredient for maintaining hair health.
Risks
Rarely, it may cause allergic reactions.
Benefits
Protects hair from damage and supports healthy growth.
Rosmarinus Officinalis (Rosemary) Leaf ExtractGood
Rosemary extract is known for its antioxidant and anti-inflammatory properties. It helps to stimulate hair growth and improve scalp health. It is a natural ingredient that enhances the overall health of the hair.
Risks
May cause irritation in sensitive individuals.
Benefits
Stimulates hair growth and improves scalp health.
Urtica Dioica (Nettle) ExtractGood
Nettle extract is rich in vitamins and minerals that nourish the hair and scalp. It helps to strengthen hair and reduce hair loss. It is a natural ingredient with beneficial properties for hair care.
Risks
Potential for allergic reactions in sensitive users.
Benefits
Nourishes and strengthens hair, promoting healthy growth.
Panthenol (Vitamin B5)Good
Panthenol is a form of vitamin B5 that is used for its moisturizing and conditioning properties. It helps to improve hair elasticity and reduce breakage. It is a beneficial ingredient for maintaining healthy hair.
Risks
Rarely, it may cause irritation in sensitive individuals.
Benefits
Moisturizes and conditions hair, improving its elasticity.
Aqua/Water/EauNeutral
Water is a universal solvent and is used as a base in most cosmetic formulations. It helps dissolve other ingredients and provides a medium for them to function. It is generally considered safe and non-reactive.
Risks
There are no known risks associated with water in cosmetic formulations.
Benefits
Water helps in the application and spreadability of the product.
Cocamidopropyl HydroxysultaineNeutral
This is a mild surfactant derived from coconut oil, used to create foam and cleanse the hair. It is considered gentle and less irritating compared to harsher surfactants. It helps in removing dirt and oil from the hair.
Risks
In rare cases, it may cause mild irritation or allergic reactions.
Benefits
It provides gentle cleansing without stripping natural oils.
Sodium Methyl 2-SulfolaurateNeutral
This is a mild surfactant used for its cleansing properties. It is derived from natural sources and is considered less irritating than traditional sulfates. It helps in creating a lather and removing impurities.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Provides effective cleansing while being gentle on the scalp.
Disodium 2-SulfolaurateNeutral
This ingredient is used as a surfactant and foaming agent. It is derived from natural sources and is considered mild. It helps in cleansing the hair and scalp effectively.
Risks
Potential for mild irritation in sensitive users.
Benefits
Offers gentle cleansing and foaming properties.
Sodium Lauroyl Methyl IsethionateNeutral
A mild surfactant that is sulfate-free and derived from coconut oil. It is used for its cleansing and foaming properties. It is less likely to cause irritation compared to traditional sulfates.
Risks
May cause mild irritation in some individuals.
Benefits
Provides gentle cleansing and is suitable for sensitive scalps.
Zinc GluconateNeutral
Zinc gluconate is used for its potential to support scalp health and reduce dandruff. It helps to balance oil production and maintain a healthy scalp environment. It is generally considered safe for use in hair care products.
Risks
Excessive use may lead to scalp irritation.
Benefits
Supports scalp health and reduces dandruff.
CaffeineNeutral
Caffeine is used in hair care products for its potential to stimulate hair growth. It helps to improve blood circulation to the scalp, promoting healthy hair growth. It is a commonly used ingredient in anti-thinning shampoos.
Risks
May cause irritation if used in high concentrations.
Benefits
Stimulates hair growth and improves scalp circulation.
Saccharomyces/Xylinum/Black Tea FermentNeutral
This ingredient is used for its antioxidant properties and potential to improve hair health. It helps to protect the hair from damage and enhance its appearance. It is derived from the fermentation of black tea.
Risks
May cause irritation in sensitive individuals.
Benefits
Protects hair from damage and enhances its appearance.
Serenoa Serrulata Fruit ExtractNeutral
Saw palmetto extract is used for its potential to reduce hair loss and promote hair growth. It helps to balance hormone levels and support scalp health. It is a natural ingredient commonly used in hair care products.
Risks
May cause allergic reactions in sensitive users.
Benefits
Reduces hair loss and supports healthy hair growth.
Lactobacillus FermentNeutral
Lactobacillus ferment is used for its potential probiotic benefits in maintaining a healthy scalp microbiome. It helps to balance the scalp environment and reduce irritation. It is a natural ingredient derived from fermentation.
Risks
May cause irritation in sensitive individuals.
Benefits
Balances scalp microbiome and reduces irritation.
AdenosineNeutral
Adenosine is used for its potential to promote hair growth and improve hair density. It helps to stimulate hair follicles and support healthy hair growth. It is a commonly used ingredient in hair care products.
Risks
May cause irritation in sensitive individuals.
Benefits
Promotes hair growth and improves hair density.
EthylhexylglycerinNeutral
Ethylhexylglycerin is used as a preservative and skin conditioning agent. It helps to enhance the efficacy of other preservatives and improve the texture of the product. It is generally considered safe for use in cosmetics.
Risks
May cause irritation in sensitive individuals.
Benefits
Enhances preservative efficacy and conditions the skin.
Lactic AcidNeutral
Lactic acid is used for its exfoliating and pH-balancing properties. It helps to remove dead skin cells and improve scalp health. It is a naturally occurring acid that is well-tolerated by most skin types.
Risks
May cause irritation in sensitive individuals.
Benefits
Exfoliates and balances scalp pH, improving health.
Guar Hydroxypropyltrimonium ChlorideNeutral
This ingredient is used as a conditioning agent to improve the texture and manageability of hair. It helps to reduce static and enhance the feel of the hair. It is derived from guar gum and is considered safe for use.
Risks
May cause buildup if not rinsed thoroughly.
Benefits
Conditions hair and improves manageability.
Triethyl CitrateNeutral
Triethyl citrate is used as a fragrance ingredient and stabilizer in cosmetic formulations. It helps to enhance the scent of the product and improve its stability. It is generally considered safe for use in cosmetics.
Risks
May cause irritation in sensitive individuals.
Benefits
Enhances fragrance and stabilizes the product.
Potassium SorbateBad
Synthetic preservative — flagged in daily-use products.
Risks
May cause irritation in sensitive individuals.
Benefits
Prevents microbial growth and extends product shelf life.
Sodium BenzoateBad
Synthetic preservative that can form benzene in the presence of vitamin C.
Risks
May cause irritation in sensitive individuals.
Benefits
Prevents microbial growth and maintains product safety.
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