Relumins Skin Science is the brand’s dedicated soap collection — bringing together every glutathione-based cleansing bar under one roof, organized by the specific skin concern each formula is built to address. Rather than a single all-purpose bar, this line takes a “formulated for a reason” approach: each soap pairs glutathione with a targeted secondary ingredient, whether that’s kojic acid for stubborn dark spots, papaya enzymes for gentle exfoliation, collagen for conditioning, or niacinamide for barrier support.