A nutritional composition comprising at least an effective amount of geranylgeranylacetone or derivative of geranygeranylacetone and/or paeoniflorin or derivative of paeoniflorin and an effective amount of Schisandrin B, wherein the ingredients act substantially simultaneously, via differing mechanism, to enhance the expression of heat shock protein in cells, particularly heat shock protein 72 in skeletal muscle. A method of same is also provided.