Function of Beauty Review, Is Function of Beauty Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 8 graded products, Function of Beauty averages Excellent (75/100). On disclosure, the brand says nothing publicly about PFAS. 8 of its products grade Good or better. Grades are model-based estimates, not lab results.
Does Function of Beauty have PFAS, by category
Worth buying from Function of Beauty Good or better, safest first
Function of Beauty
Custom Shampoo
water-based liquid shampoo, proprietary formulation
Fragrance allergens and undisclosed fragrance chemicals
Shampoos commonly contain fragrance mixes; Function of Beauty does not publicly itemize…
1,4-dioxane contamination in surfactants
Shampoos using ethoxylated surfactants (common in rinse-off formulas) may contain trace…
Preservative-induced contact dermatitis
Commonly used preservatives in shampoos (methylchloroisothiazolinone, phenoxyethanol)…
Lower PFAS concern. Rinse-off liquid shampoo with no warning signs detected.
⚠Risky category by default
Function of Beauty
Curly Hair Shampoo Base with Chia Extract
Aqueous shampoo base with botanical extract (chia)
Fragrance allergens and sensitizers
Shampoos often contain fragrance blends (synthetic or essential oils) that can trigger…
1,4-dioxane (processing contaminant)
Liquid shampoo bases may contain trace 1,4-dioxane as a byproduct of ethoxylation in some…
Lower PFAS concern. Liquid shampoo with no waterproofing, nonstick, or stain-resist claims.
⚠Risky category by default
Function of Beauty
Straight Hair Shampoo
aqueous shampoo formulation; no protective coating or water-repellent coating treatment typical
Fragrance allergens and sensitizers
Function of Beauty Straight Hair Shampoo contains fragrance components; undisclosed…
1,4-dioxane (preservative byproduct)
Some shampoo preservative systems or emulsifiers can generate trace 1,4-dioxane as a…
Eye and mucous membrane irritation from surfactants
Anionic surfactants (primary cleansing agents) can cause stinging if contact with eyes…
Lower concern. Typical shampoo with no known PFAS drivers, but brand silent on sourcing.
⚠Risky category by default
Function of Beauty
Custom Wavy Hair Shampoo Base
aqueous surfactant shampoo base; no treated coating or water-repellent coating applied
1,4-dioxane (surfactant contaminant)
Liquid shampoo bases often contain 1,4-dioxane as a byproduct of ethoxylation in…
Formaldehyde / VOCs
Aqueous shampoo bases require preservatives to prevent bacterial and fungal growth.…
Fragrance allergens
If the custom shampoo includes fragrance (either included in the base or added during…
Lower PFAS concern. Standard liquid shampoo without specialty coatings or red flags.
⚠Risky category by default
Function of Beauty
Wavy Hair Shampoo
Water-based shampoo (typical surfactants, conditioning agents, preservatives)
Formaldehyde / VOCs
Water-based shampoos require antimicrobial preservatives; common options include sodium…
Fragrance allergens and undisclosed fragrance chemicals
Shampoo formulations typically contain fragrance blends, which are protected as trade…
Coating/container leachables (if packaged in plastic)
If the product bottle is polycarbonate or polyvinyl chloride (PVC), long-term storage may…
Lower concern for PFAS. Liquid shampoos rarely require fluorinated additives, but no public disclosure.
⚠Risky category by default
Function of Beauty
Custom Curly Hair Shampoo Base with Chia Extract
Water-based liquid shampoo with chia seed extract
Fragrance allergens and undisclosed fragrance components
Shampoos marketed for curly hair often include fragrance blends; Function of Beauty does…
1,4-dioxane as manufacturing byproduct
Liquid shampoos using certain surfactants (particularly ethoxylated compounds like sodium…
Lower PFAS concern. Typical liquid shampoo with no known high-risk treatments.
⚠Risky category by default
Function of Beauty
Customizable Haircare for Coily Hair - Repair, Hydrate & Define Curls with Vegan, Gluten-Free Shampoo & Conditioner
aqueous solution (shampoo/conditioner); typical cosmetic surfactants, humectants, conditioning agents
Formaldehyde / VOCs
Rinse-off haircare frequently contains preservatives such as DMDM hydantoin…
Fragrance allergen sensitization
Shampoos marketed for coily hair often contain fragrance blends (parfum) with essential…
Microbial contamination from improper storage or preservation breakdown
Any aqueous personal-care product is vulnerable to bacterial or mold growth if stored in…
Lower concern for PFAS. Typical rinse-off haircare with no water-resistant or waterproofing triggers.
⚠Risky category by default
Function of Beauty
Clean Slate Clarifying Shampoo
aqueous shampoo formula (surfactants, water, polymers)
Fragrance allergens and sensitizers
Shampoo contains 'fragrance' listed as ingredient; this is a complex mixture often…
Polymers and conditioning agent buildup
Clarifying shampoos often contain silicones or synthetic polymers that can accumulate on…
Sulfate sensitivity in sensitive scalps
This is a clarifying shampoo likely formulated with anionic surfactants (sulfates) for…
Lower concern for PFAS in this rinse-off cosmetic, but brand discloses nothing about intentional fluorochemicals.
⚠Risky category by default
Every grade uses the same public rubric. How grades work →