Composition comprising a diindolylmethane and a retinoid to treat a skin condition

A composition for use in treating a skin condition, the composition comprising:

• (a) a first component comprising a diindolylmethane compound having the following structure:
• wherein the R groups may be the same or different and are selected from hydrogen atoms and C1-C6 hydrocarbon substituents;
• and wherein the indolyl groups are the same or different and may be indole-3-yl and/or indole-2-yl groups;
• and wherein the indolyl groups may be unsubstituted such that all substituents are hydrogen atoms, or may be substituted such that one or more substituents are selected from C1-C6 hydrocarbon substituents;
• and
• (b) a second component different from the first component, wherein the second component has a beneficial effect supplementary to and/or complementary to the effect of the first component, wherein the second component comprises at least one compound selected from an antibiotic compound, a substituted or unsubstituted azelaic acid compound, an oral contraceptive compound, sulphur, a substituted or unsubstituted salicylic acid compound, a substituted or unsubstituted resorcinol compound, a plant product, a mineral, a vitamin, and a nutraceutical product.