Ben Greenfield joins us to talk about some favorite holiday food recipes, and answer your questions on recent research saying that vitamins and supplements are a waste and potentially bad, homemade deodorants, low-carb fat-adapted fueling for crit bike racing, analyzing the Kenyan diet in relation to athletic performance and Type II diabetes, should we eat like Kenyans, genetic testing, how to ensure your delicate oils/supplements are shipped safely and avoid high heat exposure, and more.