This Liquid Hand Soap: Vitamin C has a number of benefits for your skin. Vitamin C promotes collagen production. That is beneficial because it can thicken the dermis, diminish fine lines, and helps create youthful, firm skin. It also produces an anti-inflammatory response in the skin that reduces inflammation and redness. It protects your skin cells from damaging free radicals and improves the appearance of sun-damaged skin. It also reduces hyperpigmentation of skin.