They can't get one for themselves. A psychic once told me they have a heyday with people who have Alzheimers and alcoholics, etc. There is a reason for it. They show you what happens to your blood when you eat junk food and sugary food. You can also order the Innerlight books.
Sugar blues is one cause of depression.
And so are artificial sweeteners like aspartame which wreak havoc with your brain function. That's my input, for starters. But you'll just have to wait for it, because right now I'm setting up an office and a business and don't have a split second of time. But I'm determined to get to it.