A composition useful for increasing the absorption of glutathione and for synergizing its effects. This composition may take the form of a dietary supplement, dietetic support or of an actual medicine and comprises: (a) propionyl L-carnitine or a pharmacologically acceptable salt thereof； (b) glutathione or a glutathione-containing yeast； (c) a glutathione-free yeast if the component (b) consists of glutathione. The invention is also directed to methods of making this composition as well as to methods of prevention or treatment using it.
