Willow bark

What it is

The bark of the willow tree, from white willow (Salix alba) or black willow (Salix nigra), a plant source of salicylates, used as an extract or water.

What it does

Used in toners, pads, cleansers and wash-off packs to calm skin and keep pores looking clear; the extract is far milder than salicylic acid itself.

How often

Daily in many cleansers and leave-on formulas, often morning and evening. Start exfoliating treatments gradually; peeling pads, masks and blackhead treatments are usually a few times a week.

This is willow bark, a salicylate source, which is commonly avoided during pregnancy, so ask your doctor or midwife before using it. This isn't medical advice.