Disclosed herein is a method of producing a muscadine pomace extract. The method can include combining a bronze muscadine pomace extract with a purple muscadine pomace extract to produce a muscadine pomace extract, wherein the ratio of bronze muscadine pomace extract to purple muscadine pomace extract ranges from 0.1 to 10 (weight to weight), such as from 0.3 to 3 (weight to weight), and the muscadine pomace extract has a polyphenol content of at least 2%. Also disclosed herein is a muscadine pomace extract for use as an antioxidant, such as for use as an anti-aging supplement. The composition can include a muscadine (Vitis rotundifolia) pomace extract having a polyphenol content of at least 2% and other active ingredients.本文揭示一種製備麝香葡萄果漿萃取物之方法。該方法可包括將青銅色麝香葡萄果漿萃取物與紫色麝香葡萄果漿萃取物組合以產生麝香葡萄果漿萃取物,其中青銅色麝香葡萄果漿萃取物與紫色麝香葡萄果漿萃取物之比率在0.1至10(重量/重量),諸如0.3至3(重量/重量)之範圍內,且該麝香葡萄果漿萃取物具有至少2%之多酚含量。本文亦揭示一種用作抗氧化劑,諸如用作抗衰老補充劑之麝香葡萄果漿萃取物。該組成物可包括具有至少2%之多酚含量的麝香葡萄(圓葉葡萄(Vitis rotundifolia))果漿萃取物及其他活性成份。