Phytohydroxy Acid — Allergy Risk & Safety Profile
INCI: GLUCONOLACTONE
Key Facts
- CAS Number
- 90-80-2
- Category
- active
- Risk Level
- low
- Common Allergen
- No
- Found In
- toner, serum
Is Phytohydroxy Acid safe in cosmetics?
Phytohydroxy Acid is rated low risk in cosmetic products. It is not classified as a common allergen and is generally well-tolerated by most skin types. Commonly found in toner, serum.
What is Phytohydroxy Acid?
Phytohydroxy Acid is a active commonly used in cosmetic and personal care products. It is generally considered safe for use in cosmetics at recommended concentrations.
Allergy & Safety Information
Phytohydroxy Acid is considered safe for cosmetic use at typical concentrations.
This ingredient is considered low risk from an allergenicity perspective. Reactions are uncommon at typical cosmetic use concentrations. However, no ingredient is universally safe — if you notice redness, itching, or irritation after using a product containing this ingredient, discontinue use and monitor whether symptoms resolve.
About Active Ingredient Ingredients
Active ingredients are formulated to produce a specific skin benefit — exfoliation, brightening, anti-ageing, or acne treatment. They work by interacting directly with skin biology, which also means they carry higher irritation potential than passive ingredients like emollients or thickeners.
Relevance for Phytohydroxy Acid: Actives often require an adjustment period during which temporary redness, dryness, or sensitivity is normal. However, persistent reactions after 4–6 weeks of use, or reactions that worsen rather than improve, suggest true intolerance. Introduce only one active at a time to identify the cause of any reaction.
How to Identify Phytohydroxy Acid in Products
Cosmetic ingredients are listed by their INCI (International Nomenclature of Cosmetic Ingredients) name in descending order of concentration. To check whether a product contains Phytohydroxy Acid, scan the ingredient list for its INCI name exactly as it appears above. Ingredients present at 1% or less may appear in any order after the 1% threshold.
Product types to prioritise checking: Toner, Serum. These product categories are the most common sources of Phytohydroxy Acid exposure based on formulation data.
Not sure if your products contain Phytohydroxy Acid? Paste the ingredient list into the free ingredient checker to scan for Phytohydroxy Acid and other allergens automatically.
Frequently Asked Questions
Is Phytohydroxy Acid safe for sensitive skin?
Phytohydroxy Acid is generally well-tolerated, even by sensitive skin.
What products contain Phytohydroxy Acid?
Phytohydroxy Acid is commonly found in toner, serum.
What does Phytohydroxy Acid do in cosmetics?
Phytohydroxy Acid functions as a active in formulations.
Related Guides
Anti-Aging for Sensitive Skin
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How to Read Ingredient Labels
Decode INCI names and find hidden allergens in your products.
Find Your Skin Allergy Trigger
Step-by-step elimination method to identify your trigger.
Contact Dermatitis Guide
Symptoms, causes, patch testing, and treatment options.
Is Phytohydroxy Acid causing YOUR skin reactions?
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