A resveratrol-containing composition capable of providing a therapeutic benefit to a subject such as modulation of a biological activity, improving cell transplantation therapy, or improving macular degeneration or dystrophy treatments. The compositions comprise trans-resveratrol, a metal chelator, one or more additional antioxidants such as quercetin, gamma-tocotrienol, or apple polyphenols, allicin, and nucleotides.