Function of Beauty · Shampoo
Function of Beauty Customizable Haircare for Coily Hair - Repair, Hydrate & Define Curls with Vegan, Gluten-Free Shampoo & Conditioner
Lower concern for PFAS; typical rinse-off haircare with no water-repellent coating or waterproofing triggers.
Function of Beauty's customizable shampoo and conditioner are liquid cosmetics with no known Teflon-family coating coatings, water-repellent treatments, or nonstick surfaces, the main vectors for PFAS in consumer products. The brand makes no PFAS claims and provides no third-party testing data.
Shop Function of Beauty on Amazon →Material
aqueous solution (shampoo/conditioner); typical cosmetic surfactants, humectants, conditioning agents
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Function of Beauty's shampoo and conditioner are aqueous solutions containing surfactants (detergents), humectants (glycerin, panthenol), and conditioning polymers typical of mainstream haircare. The product is formulated as rinse-off cosmetics, meaning exposure duration is brief and most ingredients wash away without absorption or retention on skin. Vegan formulation signals exclusion of animal-derived proteins and lanolin, replacing them with plant-based or synthetic alternatives; gluten-free labeling appeals to scalp-sensitive consumers but carries no direct safety implication for non-celiac users.
The brand's record and disclosure
Function of Beauty markets customizable haircare with emphasis on ingredient transparency but has not published detailed PFAS or heavy-metal testing data publicly. The brand holds no third-party certifications (e.g., EWG Verified, Leaping Bunny) on record. No significant recalls or regulatory actions against this product line have been documented. Ingredient lists are available online, enabling independent review, but the brand's silence on PFAS testing is typical of mid-market haircare and does not indicate contamination, only lack of voluntary disclosure.
How it compares in its category
Rinse-off shampoos and conditioners carry inherently lower risk than leave-on products because contact time is measured in minutes and residue is minimal. Function of Beauty's vegan positioning aligns with consumer demand but does not confer safety advantages over conventional formulas; both may contain identical surfactants and polymers. Customization (ingredient selection) is a marketing feature that does not alter the fundamental safety profile of individual components. Compared to drugstore brands, Function of Beauty's transparency on ingredient sourcing is competitive but unremarkable.
If you buy it
Use as directed: wet hair, apply small amount, massage scalp briefly, rinse thoroughly with water. No heat or prolonged contact is required; standard shampooing poses no elevated risk. Discontinue if scalp rash, itching, or irritation develops within one week, as allergic response to fragrance, botanical extracts, or preservatives can occur in sensitive individuals. Store in cool, dry conditions and replace when product separates, discolors, or odor changes, indicating microbial growth or ingredient degradation (typical shelf life 12-24 months unopened).
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Formaldehyde releasers in preservatives
Rinse-off haircare frequently contains preservatives such as DMDM hydantoin, imidazolidinyl urea, or diazolidinyl urea, which slowly release trace formaldehyde to prevent bacterial and fungal growth. Exposure during brief shampooing is minimal and well below dermal irritation thresholds; no public data on this product's specific preservative system.
Fragrance allergen sensitization
Shampoos marketed for coily hair often contain fragrance blends (parfum) with essential oils or synthetic musks that can trigger contact dermatitis or scalp sensitization in susceptible individuals, particularly with repeated exposure. Function of Beauty's ingredient transparency should allow pre-purchase review; patch testing on inner arm is recommended for users with sensitive scalp.
Heavy metals in colorants or mica (if present)
Shampoos are not typically pigmented or pearlescent and thus do not require colorants or mica likely to harbor cadmium or lead. No evidence that Function of Beauty formulations contain these additives; rinse-off nature limits any exposure window.
Microbial contamination from improper storage or preservation breakdown
Any aqueous personal-care product is vulnerable to bacterial or mold growth if stored in warm, humid conditions or if preservative system degrades over time. This risk is product-agnostic and managed by the user through cool storage and timely replacement; no specific formulation failure is on record for this brand.
1,4-dioxane contamination from surfactant or emulsifier synthesis
1,4-dioxane is a byproduct of ethoxylation (production of common surfactants like sodium laureth sulfate); the FDA allows trace residues in cosmetics. Function of Beauty has not published 1,4-dioxane testing results, and no regulatory action documents the presence of elevated levels; contamination is not established for this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
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More shampoo grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.