THE 200 POINT SYSTEM With so many different diets available, how are we to know what works and what is safe? The only way to be sure is to discover the author's background and the research behind the diet's methodology. Every good diet should give a background about the author and his/her credentials and experience in the fields of nutrition and biochemistry. However, even a vast resume does not mean a credible and safe diet. But it does suggest, at least, that the author has some knowledge of.