Tetrahydrocurcuminoids (THC)*, a colorless hydrogenated product derived from the yellow curcuminoids, (the biologically active principles from the rhizomes of Curcuma longa), function as efficient antioxidant compounds. The superior antioxidant property of THC, combined with the lack of yellow color, render this product useful in achromatic food and cosmetic applications that currently employ conventional synthetic antioxidants. Curcuminoids are reported to be potent antioxidant compounds by virtue of their molecular structure. THC have also shown significant antioxidant action in a number of in vitro and preclinical studies.