William Jiang, MLS is the author of more than 60 books and has been featured in The New York Times and on CBS News, among other media outlets. Mens sana in corpore sano is a Latin phrase, usually translated as "a sound mind in a sound body" or "a healthy mind in a healthy body", is attributed to the Roman poet, Juvenal who lived during the first century AD. The link between body and mind has been known for over two thousand years, and yet we think we can eat that Big Mac and not suffer consequences. There is a strong link between that fast food and obesity, diabetes, clinical depression, and other serious problems of body and mind.. Indeed, even clinical depression and schizophrenia can possibly be prevented by a healthy diet. For an interesting book about natural mental health I invite you to check out my The Medical Librarian's Guide to Natural Mental Health: Anxiety, Bipolar, Depression, Schizophrenia, and Digital Addiction: Nutrition, and Complementary Therapies, 4rd Edition. Also, I should add that because of my efforts over some time, using the knowledge in this book, my A1C had gone from over 10 to under 6. I went from having really out of control diabetes despite using maximum doses of the Metformin, Invokana, and Januvia diabetes medicines with 235 fasting numbers at almost 300 pounds, to no longer having diabetes or GERD stomach acid anymore- and now I am totally without medicine and about 210 pounds. Indeed, it seems that I have much to teach the world, especially the younger, fast-food eating and video game addicted generation, about physical and mental health. I write to help others, but it really helps me I invite you to use something that really works