A natural mineral commonly used as a fine powder, popularly known as talcum powder. Talc is an effective dry lubricant, and it is sometimes used for personal hygiene; it is an especially popular ingredient in baby powder, foot powder, and cosmetics.

When commercially produced, talc is generally considered safe. Some studies suggest that the mineral could cause certain cancers, especially ovarian cancer. While those studies are not widely accepted, some people avoid talc for this reason.

People with sensitive skin may choose to avoid products with talc, as the substance can cause mild irritation in some circumstances.