California Naturals Re:GRO Anti-Thinning Scalp Serum - 3 fl oz: Unscented, All Hair Types

Common questions

Is California Naturals Re:GRO Anti-Thinning Scalp Serum - 3 fl oz: Unscented, All Hair Types healthy?

California Naturals Re:GRO Anti-Thinning Scalp Serum - 3 fl oz: Unscented, All Hair Types scores 85/100 on Scout's independent analysis of ingredients, additives, and lab results — one of the stronger scores in Scout's catalog. This scalp serum contains a variety of beneficial ingredients such as Capixyl™, aloe vera, panthenol, biotin, and rosemary oil, which are known for promoting hair health and reducing thinning.

Which ingredients drive California Naturals Re:GRO Anti-Thinning Scalp Serum - 3 fl oz: Unscented, All Hair Types' score?

In Scout's ingredient-by-ingredient analysis, Capixyl™, Aloe Barbadensis Leaf Juice, Panthenol (Vitamin B5) count in its favor; Sodium Benzoate is flagged as an ingredient of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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California Naturals Re:GRO Anti-Thinning Scalp Serum - 3 fl oz: Unscented, All Hair Types

California Naturals
85 Excellent

Analysis updated August 2026 · How Scout scores

$28.99 · 20 fl oz · $1.45 / fluid ounce
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At a glance

Beneficial ingredients 12
Harmful ingredients 1
Category Shampoo
Summary

This scalp serum contains a variety of beneficial ingredients such as Capixyl™, aloe vera, panthenol, biotin, and rosemary oil, which are known for promoting hair health and reducing thinning. The formulation is free from harsh chemicals like sulfates, parabens, and synthetic fragrances, making it a gentle option for scalp care. However, the presence of some processed ingredients and the overall processing level slightly limit its maximum potential score.

Key ingredients 20

Capixyl™
Good

Capixyl™ is a blend of peptides and red clover extract known for its potential to reduce hair thinning. It is believed to improve hair density and scalp health. It is generally well-tolerated and considered beneficial for hair care.

Risks

There are minimal risks associated with Capixyl™, though some individuals may experience mild irritation.

Benefits

Capixyl™ can help improve hair density and reduce hair thinning.

Aloe Barbadensis Leaf Juice
Good

Aloe vera is known for its soothing and moisturizing properties. It helps to hydrate the scalp and reduce irritation. It is a natural ingredient that is well-regarded in hair care.

Risks

Aloe vera is generally safe, but some people may experience allergic reactions.

Benefits

Aloe vera provides hydration and soothing benefits to the scalp.

See more about Aloe Barbadensis Leaf Juice →
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 shine. It is a beneficial ingredient in hair care products.

Risks

Panthenol is generally safe, but excessive use may lead to buildup.

Benefits

Panthenol enhances hair moisture, elasticity, and shine.

See more about Panthenol (Vitamin B5) →
Biotin
Good

Biotin is a B-vitamin that is often associated with hair health. It is believed to strengthen hair and promote growth. It is a popular ingredient in hair care products for its potential benefits.

Risks

Biotin is generally safe, but excessive intake can lead to skin rashes.

Benefits

Biotin supports hair strength and growth.

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Rosmarinus Officinalis (Rosemary) Leaf Oil
Good

Rosemary oil is known for its antimicrobial and anti-inflammatory properties. It can help to improve scalp health and promote hair growth. It is a natural ingredient that is well-regarded in hair care.

Risks

Rosemary oil can cause irritation in sensitive individuals.

Benefits

Rosemary oil supports scalp health and hair growth.

See more about Rosmarinus Officinalis (Rosemary) Leaf Oil →
Adenosine
Good

Adenosine is used in hair care for its potential to promote hair growth and improve hair density. It is believed to enhance the anagen phase of hair growth. It is considered a beneficial ingredient for hair health.

Risks

Adenosine is generally safe, but some may experience mild irritation.

Benefits

Adenosine promotes hair growth and improves hair density.

PhytoCellTec™ Solar Vitis
Good

This ingredient is derived from grape stem cells and is used for its antioxidant properties. It helps to protect hair and scalp from environmental damage. It is a beneficial addition to hair care formulations.

Risks

There are minimal risks associated with this ingredient.

Benefits

It provides antioxidant protection for hair and scalp.

Cucurbita Pepo (Pumpkin) Seed Oil
Good

Pumpkin seed oil is rich in nutrients and is used for its potential to promote hair growth. It is believed to improve scalp health and reduce hair loss. It is a natural and beneficial ingredient in hair care.

Risks

Pumpkin seed oil is generally safe, but may cause irritation in sensitive individuals.

Benefits

It promotes hair growth and improves scalp health.

See more about Cucurbita Pepo (Pumpkin) Seed Oil →
Serenoa Serrulata Fruit Extract
Good

Also known as saw palmetto, this extract is used for its potential to reduce hair loss. It is believed to inhibit DHT, a hormone linked to hair thinning. It is a beneficial ingredient for those experiencing hair loss.

Risks

Saw palmetto is generally safe, but may cause mild digestive issues.

Benefits

It helps to reduce hair loss by inhibiting DHT.

Malus Domestica Fruit Cell Culture Extract
Good

Derived from apple stem cells, this extract is used for its regenerative properties. It helps to protect and rejuvenate hair follicles. It is a beneficial ingredient for promoting hair vitality.

Risks

There are minimal risks associated with this ingredient.

Benefits

It rejuvenates hair follicles and promotes hair vitality.

Ricinus Communis (Castor) Seed Oil
Good

Castor oil is known for its moisturizing and conditioning properties. It helps to nourish the scalp and promote hair growth. It is a natural and beneficial ingredient in hair care.

Risks

Castor oil is generally safe, but may cause irritation in sensitive individuals.

Benefits

It nourishes the scalp and promotes hair growth.

See more about Ricinus Communis (Castor) Seed Oil →
Caprylyl/Capryl Glucoside
Good

This is a mild, non-ionic surfactant derived from coconut oil and glucose. It is used for its gentle cleansing properties. It is a beneficial ingredient for sensitive scalps.

Risks

There are minimal risks associated with this ingredient.

Benefits

It provides gentle cleansing suitable for sensitive scalps.

See more about Caprylyl/Capryl Glucoside →
Aqua/Water/Eau
Neutral

Water is a common solvent used in cosmetic formulations. It acts as a base for the product, helping to dissolve other ingredients. It does not provide direct benefits or risks.

Risks

There are no inherent risks associated with water in cosmetic formulations.

Benefits

Water helps to hydrate and dissolve other beneficial ingredients in the formula.

See more about Aqua/Water/Eau →
1,2-Hexanediol (and) Caprylyl Glycol
Neutral

These are used as humectants and preservatives in cosmetic formulations. They help to maintain moisture and extend product shelf life. They are generally considered safe and non-irritating.

Risks

There are minimal risks, though some individuals may experience mild irritation.

Benefits

These ingredients help to retain moisture and preserve the product.

Caffeine
Neutral

Standard formulation ingredient — neither beneficial nor harmful at typical use.

Risks

Caffeine is generally safe, but excessive use may cause irritation.

Benefits

Caffeine stimulates circulation and may reduce hair loss.

See more about Caffeine →
Xanthan Gum
Neutral

Xanthan gum is used as a thickening agent in cosmetic formulations. It helps to stabilize and improve the texture of the product. It is generally considered safe and non-irritating.

Risks

There are minimal risks, though some individuals may experience mild irritation.

Benefits

It stabilizes and thickens the product formulation.

See more about Xanthan Gum →
Silica
Neutral

Silica is used in cosmetic formulations for its texturizing properties. It helps to improve the feel and application of the product. It is generally considered safe and non-irritating.

Risks

There are minimal risks, though inhalation of silica dust can be harmful.

Benefits

It improves the texture and application of the product.

See more about Silica →
Ethylhexylglycerin
Neutral

Ethylhexylglycerin is used as a preservative and skin conditioning agent. It helps to enhance the efficacy of other preservatives and improve skin feel. It is generally considered safe and non-irritating.

Risks

There are minimal risks, though some individuals may experience mild irritation.

Benefits

It enhances preservation and improves skin feel.

See more about Ethylhexylglycerin →
Carbomer
Neutral

Carbomer is used as a thickening agent in cosmetic formulations. It helps to stabilize and improve the texture of the product. It is generally considered safe and non-irritating.

Risks

There are minimal risks, though some individuals may experience mild irritation.

Benefits

It stabilizes and thickens the product formulation.

See more about Carbomer →
Sodium Benzoate
Bad

Synthetic preservative that can form benzene in the presence of vitamin C.

Risks

High concentrations may cause irritation or allergic reactions.

Benefits

It preserves the product by preventing microbial growth.

See more about Sodium Benzoate →

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