The hay diet involves avoiding foods that so called 'fight' with
each other, it is a food combining type of diet, which means
that you avoid eating certain foods together because it is
supposedly bad for your digestion. Protein is not eaten with
starch, they can both be eaten but at separate meal occasions.
Scientifically this is impossible to achieve since most starchy
foods such as bread and potatoes contain some protein anyway.
The body is well adapted to digest both proteins and starch, and
the enzymes necessary to digest them are secreted in response to
the food being in the stomach. The diet first gained credence as
a method of weight loss since most dietary restrictions usually
mean consuming less calories than the body needs. It is not
better than any other diet that is low in calories, any weight
loss should only be achieved through a sensible diet. This diet
should always be avoided by anyone who has diabetes since
carbohydrate should be spread evenly throughout the day and not
kept to one meal only