Dr. Joel Wallach addressed the human body's ability to achieve natural healing, along with the benefits of remedies and supplements that aid in the body's recovery from chronic conditions. He pinned the cause of Alzheimer's on a simple nutritional deficiency-- that of cholesterol. Wallach contends that cholesterol does not block arteries to the heart; rather, the culprit is consuming things like cooking oils and fried foods. He also related the disease of MS to this issue, as well as other nutritional deficiencies.

In his show appearances, he has frequently suggested that people avoid eating gluten products, which he believes damage the body's ability to absorb nutrients. He characterized a substance in buckwheat, fagopyrin, as being worse than gluten, associating it with lupus. For the skin problem of psoriasis, Wallach again pointed toward nutritional deficiencies and recommended such supplements as MSM and collagen peptides.