Disclosed herein is a composition comprising a liposome, a cardiolipin, and at least one antioxidant, wherein the composition is useful for improving, maintaining, or restoring a mitochondrial membrane and/or mitochondrial function. In one example, the liposome is primarily composed of phosphatidylcholine, the cardiolipin is tetraoleoyl-cardiolipin, and the at least one antioxidant is methylgentisate, l-carnosine, or both. The composition may be topically administered, orally administered, or parenterally administered, for example administered by injection. If topically administered, the composition may be administered for example, as a cream, lotion, gel, paste, spray, tonic, or other suitable form and may contain various additives, for example, one or more of an emollient, a humectant, a penetration enhancer, a vitamin, a fragrance, a pigment, and a moisturizer.