Define & Refresh Styling Duo vs Pettenon RR Line Real Keratin Lotion: which is safer?

Dyson Define & Refresh Styling Duo is our pick: better on PFAS and on the overall hazard picture.

Our pick

Dyson

Define & Refresh Styling Duo

PFAS grade

C 75/100

Overall grade

F 63/100

Verdict

Buy with care

Hazard flags

⚑ 3

Material

plastic housing, likely nylon/polymer barrel; ceramic or tourmaline-coated heating elements

Confidence

72%

PossibleVolatile organic compounds (VOC) off-gassing from plastic housing

PossibleCeramic/tourmaline coating degradation and thermal stability

PossibleFlame retardants or antimicrobial additives in polymer components

Why this gradeBuy

Spray Lotion

Pettenon RR Line Real Keratin Lotion

PFAS grade

C 75/100

Overall grade

F 59/100

Verdict

Buy with care

Hazard flags

⚑ 4

Material

Keratin protein, water, cosmetic emollients

Confidence

72%

PossibleFormaldehyde-releasing preservatives

PossibleFragrance allergens and undisclosed fragrance compounds

PossibleSpray inhalation of fine particles and volatile solvents

Why this gradeBuy

Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →

More hair spray: see the full ranking