Can I use it on a sensitive scalp or colour-treated hair?

Red pepper extract can cause a warming sensation that feels intense on sensitive skin. Before first use, do a small patch test: apply a little product behind the ear or on a small area of the scalp, wait a few hours, and check for redness or irritation. If the scalp is irritated, sunburnt, scratched or otherwise damaged, do not use this shampoo. If you have a very sensitive scalp or a skin condition, ask a specialist before starting.

For colour-treated hair, this shampoo is not designed to strip colour, but its main effect is on the scalp. If your colour is fragile, you can use this shampoo only on the scalp and a gentler shampoo on the rest of the hair. Massage it thoroughly and rinse well. If you notice stinging or redness that does not settle, stop using it and consult a specialist. If you are pregnant, breastfeeding, on medication or have a chronic skin condition, ask a specialist before use.