Here are the 5 foods he recommends:
1. Vitamin A
A Vitamin A deficiency has been linked to some autoimmune diseases, including rheumatoid arthritis and type 1 diabetes. Researchers believe that Vitamin A helps regulate a “calm down” message to the immune system, which can tone down excessive immune responses that can damage the body. True Vitamin A can only be found in animal products such as fish, shellfish and liver, but plant carotenes – a precursor to Vitamin A – are found in sweet potatoes and carrots.