James DiNicolantonio, Ph.D. joins me to discuss Your immune system as the first and last line of defense against outside infection. Certain actions will weaken your immune system, and other actions will strengthen it. Ask your questions in the comments…

01:00 Why We Wrote a Book About Immunity 04:40 Vitamin D and the Immune System 11:11 Cytokine Storm and Overactive Immune Response 13:58 Magnesium Deficiency Causing Immunodeficiency 15:54 How Much Vitamin D and How to Get It 19:20 How to…