Beauty ingredients explained in plain English

A common synthetic dye in permanent hair color that can cause allergic reactions in sensitive individuals; generally considered safe at regulated levels but requires patch testing.

A synthetic hair dye that provides blue-violet tones but may cause skin irritation in sensitive individuals.

A common synthetic dye in permanent hair color that can cause allergic reactions in sensitive individuals; patch testing is strongly recommended.

A synthetic blue dye used in hair color; generally safe for most people but may cause irritation in sensitive individuals.

A synthetic dye used in permanent hair color; effective for color but may cause skin irritation in sensitive individuals.

A synthetic red hair dye that can stain skin and may cause irritation in sensitive individuals.

Basic Brown 17 is a synthetic dye that adds brown tones to hair color, but it may cause skin irritation in sensitive individuals.

Basic Orange 69 is a synthetic hair dye that delivers vibrant orange tones but may cause irritation in sensitive individuals.

A synthetic dye ingredient used in permanent hair color; it can be effective but may cause skin irritation in sensitive individuals.

A synthetic dye ingredient used in hair color; can cause skin irritation in sensitive individuals and is not used in leave-on skincare.

HC Blue No. 12 is a synthetic blue dye for hair color that is generally considered safe in small amounts but may cause irritation for sensitive scalps.

HC Blue No. 13 is a synthetic blue dye for hair color, generally considered safe in rinse-off products but may cause irritation in sensitive individuals.

HC Blue No. 14 is a synthetic hair dye that adds blue tones but may cause skin irritation in sensitive individuals.

A synthetic blue dye for hair color that is generally safe for most people but may cause allergic reactions in sensitive individuals.

HC Blue No. 17 is a synthetic hair dye that delivers blue tones but may cause irritation for sensitive scalps.

HC Orange No. 1 is a synthetic dye for orange hair color, but it may cause skin irritation in sensitive individuals and has limited safety data for long-term use.

HC Orange No. 5 is a synthetic dye that adds orange tones to hair color, but it may cause irritation in sensitive individuals and has limited safety data for long-term use.

HC Orange No. 6 is a synthetic dye that adds orange tones to hair color, but it may cause skin irritation in sensitive individuals.

HC Red 18 is a synthetic dye that adds red shades to hair color, but it may cause skin irritation in sensitive individuals.

HC Red No. 1 is a synthetic hair dye that adds red tones but may cause irritation in sensitive individuals.

HC Red No. 10 is a synthetic dye used in hair color products; it is generally considered safe for external use but may cause irritation in sensitive individuals.

A synthetic red hair dye that can deliver vibrant color but may cause irritation in sensitive individuals.

HC Red No. 14 is a synthetic dye used in hair color products; it is generally considered safe for use on hair but may cause irritation for sensitive scalps.

HC Violet No. 2 is a synthetic hair dye that adds violet tones but may cause irritation in sensitive individuals.

HC Yellow No. 17 is a synthetic yellow dye for hair color that is generally considered safe in rinse-off products but may cause irritation for sensitive scalps.

HC Yellow No. 2 is a synthetic dye that adds yellow tones to hair color, but it may cause skin irritation in sensitive individuals.

HC Yellow No. 4 is a synthetic hair dye that adds yellow shades to hair color products, but it may cause skin irritation in sensitive individuals.

HC Yellow No. 7 is a synthetic hair dye that can provide vibrant yellow shades, but it may cause irritation in sensitive individuals and is not intended for skin or eyelash use.

A synthetic blue-violet dye for hair color, generally safe for most people but can cause irritation in sensitive scalps.

A synthetic yellow dye used in hair color; generally considered safe in small amounts but may cause irritation for sensitive scalps.

A synthetic yellow dye for hair color, generally considered safe in regulated concentrations but can cause irritation in sensitive individuals.

A synthetic dye used in hair color that can cause irritation in sensitive individuals but is generally considered safe in regulated concentrations.

A synthetic violet dye for hair color, generally safe in rinse-off formulas but may cause irritation for sensitive scalps.

A common but potent hair dye ingredient that can cause allergic reactions and skin irritation; use with caution and always patch test.

Picramic acid is a synthetic dye used in hair color, but it has limited safety data and potential for skin irritation, making it a less common choice in modern formulations.