Codex Beauty launches four new Codex Beauty Bia Cold-Process Bar Soaps (£17 each) this month: Cleansing, Balancing, Uplifting, and Invigorating. Unlike traditional bar soaps for the body, these bars don't contain any surfactants or added chemical ingredients; and because they're created using a cold-press process, a high level of glycerin — the ingredient that hydrates your skin — is left in the formula.