Bare Pure Clean Shampoo

The active anti-dandruff ingredient in medicated shampoos, used at 1% or 2% to reduce Malassezia yeast and flaking. It is well studied and considered safe in rinse-off use; EU rules cap leave-on hair products because it is more irritating with prolonged skin contact, which is why it is formulated into shampoos meant to be rinsed out.

An undisclosed scent blend that can contain dozens of components. The single most common cause of cosmetic contact allergy, and the blend is not itemized, so you cannot see what is in it.

A polymer of quaternary ammonium compounds widely used as a conditioning and antistatic agent in hair products. It is well established in cosmetic formulations with a strong safety record in rinse-off applications.

The base most products are built on. It carries the other ingredients and has no safety concern.

A coconut-derived mild surfactant best known as the main cleansing agent in syndet ("soap-free") bars and gentle body washes. It has a good tolerability record and is often chosen specifically for sensitive or eczema-prone skin.

A synthetic polymer used to thicken and stabilize cosmetic formulas. The polymer chains are too large to penetrate skin; graded safe by the Cosmetic Ingredient Review and widely used in rinse-off and leave-on products.

The sodium salt of benzoic acid, used as a preservative in both foods and cosmetics. Decades of safety review support its use at typical cosmetic concentrations, with mild irritation the main reported issue in sensitive skin.

Used in tiny amounts to set a product to skin-friendly pH. No concern at those levels.