My latest column for the San Francisco Chronicle tackles today’s vexing questions about vitamin D. How much do we need? How much is safe? How much of the fuss about it is due to marketing hype? No easy answers on this one, alas.
I’m doing a short keynote on January 20 from 4:30-6:15 PST (7:30-9:15 EST). The conference website is here. The schedule for the conference is here. Information about my session is here.