75Excellent

Does Function of Beauty shampoo have PFAS?

The verdict
Function of Beauty shampoo averages 75 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Function of Beauty shampoo products graded as of October 2026, level with the 75 out of 100 median for the 34 other shampoo brands graded alongside it.
Free to quote with attribution to PFAS Authority and a link to pfasauthority.com/brands/function-of-beauty/shampoo.

Function of Beauty shampoo averages Excellent on our four-band scale. 8 of the 8 we graded are worth buying. That is above 50% of the shampoo brands we grade.

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.

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  • polypropylene filter housing, carbon/sediment cartridge
  • We found no PFAS statement from the brand
  • Bacterial growth in spent cartridges

3 hazards checked on this product, all on its full breakdown.

  • RO membrane, carbon filters, stainless steel housing
  • We found no PFAS statement from the brand
  • Bacterial and microbial growth in housing and filters

4 hazards checked on this product, all on its full breakdown.

Avocado Vegan Mattress

Avocado

Vegan Mattress

100ExcellentPFAS grade
✓ MADE SAFE Certified✓ Global Organic Textile Standard (GOTS)
  • organic cotton, natural latex, coconut coir, recycled steel coils
  • The brand calls it PFAS-free, which we have not verified
  • Heavy metals

2 hazards checked on this product, all on its full breakdown.

Function of Beauty shampoo worth buying Good or better, best-graded first

Function of Beauty Custom Wavy Hair Shampoo Base

Function of Beauty

Custom Wavy Hair Shampoo Base

75ExcellentPFAS grade
  • aqueous surfactant shampoo base; no treated coating or water-repellent coating applied
  • We found no PFAS statement from the brand
  • 1,4-dioxane (surfactant contaminant). Liquid shampoo bases often contain 1,4-dioxane as a byproduct of…

3 hazards checked on this product, all on its full breakdown.

Function of Beauty Curly Hair Shampoo Base with Chia Extract

Function of Beauty

Curly Hair Shampoo Base with Chia Extract

75ExcellentPFAS grade
  • Aqueous shampoo base with botanical extract (chia)
  • We found no PFAS statement from the brand
  • Fragrance allergens and sensitizers. Shampoos often contain fragrance blends (synthetic or essential oils)…

2 hazards checked on this product, all on its full breakdown.

Function of Beauty Clean Slate Clarifying Shampoo

Function of Beauty

Clean Slate Clarifying Shampoo

75ExcellentPFAS grade
  • aqueous shampoo formula (surfactants, water, polymers)
  • We found no PFAS statement from the brand
  • Fragrance allergens and sensitizers. Shampoo contains 'fragrance' listed as ingredient; this is a complex…

3 hazards checked on this product, all on its full breakdown.

Function of Beauty Custom Curly Hair Shampoo Base with Chia Extract

Function of Beauty

Custom Curly Hair Shampoo Base with Chia Extract

75ExcellentPFAS grade
  • Water-based liquid shampoo with chia seed extract
  • We found no PFAS statement from the brand
  • Fragrance allergens and undisclosed fragrance components. Shampoos marketed for curly hair often include…

2 hazards checked on this product, all on its full breakdown.

Function of Beauty Custom Shampoo

Function of Beauty

Custom Shampoo

75ExcellentPFAS grade
  • water-based liquid shampoo, proprietary formulation
  • We found no PFAS statement from the brand
  • Fragrance allergens and undisclosed fragrance chemicals. Shampoos commonly contain fragrance mixes; Function…

3 hazards checked on this product, all on its full breakdown.

  • aqueous solution (shampoo/conditioner); typical cosmetic surfactants, humectants, conditioning agents
  • We found no PFAS statement from the brand
  • Formaldehyde / VOCs. Rinse-off haircare frequently contains preservatives such as DMDM hydantoin…

3 hazards checked on this product, all on its full breakdown.

Function of Beauty Straight Hair Shampoo

Function of Beauty

Straight Hair Shampoo

75ExcellentPFAS grade
  • aqueous shampoo formulation; no protective coating or water-repellent coating treatment typical
  • We found no PFAS statement from the brand
  • Fragrance allergens and sensitizers. Function of Beauty Straight Hair Shampoo contains fragrance components…

3 hazards checked on this product, all on its full breakdown.

Function of Beauty Wavy Hair Shampoo

Function of Beauty

Wavy Hair Shampoo

75ExcellentPFAS grade
  • Water-based shampoo (typical surfactants, conditioning agents, preservatives)
  • We found no PFAS statement from the brand
  • Formaldehyde / VOCs. Water-based shampoos require antimicrobial preservatives; common options include sodium…

3 hazards checked on this product, all on its full breakdown.

The same question, asked of the other shampoo brands

Best average grade first. Function of Beauty averages 75.

See every Function of Beauty product we grade on the Function of Beauty brand page, or the full shampoo ranking.