There have been a number of false claims about the biological activity of pangamic acid, a derivative of the amino acid glycine (pangamic acid is dimethyl glycine). This substance has been reported to be an oxygenator of body tissues, and also as an excellent scavenger of free radicals. Unfortunately, none of these claims has held up under scientific scrutiny. Therefore, we suggest that visitors avoid using this chemical as a vitamin suppliment until further work has been conducted on the biological properties.