Nitric oxide and danger of L-arginine for heart patients. More detailed explanation of pH and voltage than on other Tennant videos. Lots of detail of specifics of what he does for macular degeneration and glaucoma. He has an original idea about auto-immune disease. He thinks it's cell-wall-deficient foreign organisms, the body is unable to recognize as invaders. They keep digesting our bodies for their food and create what we see as auto-immune symptoms. He compares homeopathic silver water with MMS (sodium chlorite).