Optimum Salon Haircare No-Lye Relaxer

Silent Spring Institute documented that this product matches the chemical profile of Dark & Lovely's No-Lye Relaxer, which contains methylparaben, ethylparaben, and butylparaben. The paraben family is classified by the EU SCCS as suspected endocrine disruptors with estrogen-mimicking activity; butylparaben in particular is restricted in the EU.

Silent Spring Institute documented that this product carries the same phthalate profile as Dark & Lovely's relaxer — DEP and DEHP hidden under the generic 'Fragrance' label. These phthalates are endocrine disruptors linked to reproductive toxicity; DEHP is on California Prop 65's list as a known reproductive toxicant.

DMDM Hydantoin is a preservative that slowly releases formaldehyde — a Group 1 known human carcinogen (IARC) — to prevent microbial growth. The formaldehyde release exposes scalp and respiratory tract during application. Banned or restricted in cosmetics in the EU and several US states.

Generic 'Parfum' is an undisclosed mixture documented by Silent Spring Institute to carry phthalates as fragrance fixatives in this product class.

The multi-mineral caustic chemistry permanently breaks hair disulfide bonds. The high pH formulation frequently causes scalp burns, lesions, and chemical injury. Epidemiological research (Boston University Black Women's Health Study, NIEHS Sister Study) has linked frequent chemical relaxer use to elevated risks of uterine and breast cancer.

Petroleum-derived occlusives that serve as carrier base. Cosmetic-grade versions are generally low-risk but provide no nutritional benefit and may contain trace polycyclic aromatic hydrocarbons depending on refining grade.