But feeling better after taking a treatment or remedy doesn't necessarily mean that it works for everyone. There are many other factors which could be at play. If the claims sound too good to be true, they probably are. Many theories used to promote nutrition products, diets and dietary recommendations are purely science fiction. These theories are promoted in order to gain profit from the sale of products of questionable value.
Science is the basis for sound nutrition information.
Be wary of such advice. Food combination diets are one example. The claim that the body cannot digest protein and starch at the same time has no scientific basis. Many nutritious foods such as a salmon sandwich would not be allowed on this diet. Although you may lose weight on these diets, it's because you will be eating fewer calories, not because of the odd food combinations.