The US Food and Drug Administration last month invited Dr. Kalyanam Nagabhushanam, president R&D, Sabinsa Corporation, to make a presentation as part of the CDER Botanical Drug Seminar Series.    Nagabhushanam's presentation covered curcuminoids and other nutritional ingredients. He reviewed efficacy data, mechanistic considerations of pharmacological activity, metabolism, effects of nutrients on gut microbiome and vice versa, as well as methods employed to detect and deter intention...