Ambrotose complex powder can only be purchased through the company or through a distributor. I ordered mine online from Mannatech. Make sure if you order it, you order the complex powder. I'm sure he could take it. It's a nutritional supplement, not an herb or a medicine. It doesn't have anything in it that will harm the body. It's like eating a bunch of vine-ripened fruits and vegetables. If you read the article on the main page of the cancercompass website about nutrition, it mentions the effects of eating the right foods such as broccoli and cabbage. Ambrotose gives you the nutrition that most of us don't get from our everyday diets. I can't tell you how glad I am that I started taking it. I truly believe it will help your father. Most doctors are skeptical of it because most have never heard of it, but if you do some research on it you'll find that the way the product works makes sense. I found it helpful to take my treatment into my own hands. Cancer responds differently in every body and doctors are not always aware of every treatment option available, depending on the type of cancer it is and what part of the world we live in. Let me know if you need more information. I've also heard from a doctor that works for the company that it reduces the side effects of chemo.