Double Wood Supplements is a dietary supplement company that offers rarely sold nootropics, an exclusive niche with very few sellers. We explanations have not been assessed by the Food and Drug Administration. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. Cissus Quadrangularis is a perennial plant in the grape family which has a long history of use in traditional medicinal practices, and was often used to promote the healing of broken bones and injured ligaments and tendons.