Body Slim Down Garcinia Australia For most of human existence, foods such as processed sugar, as well as wheat, rice and other grains could not be consumed by humans.The main problem with eating these foods is that the human body never evolved to digest these foods very well. And because we can not digest food very well, it can cause many problems in our body, especially if we eat these foods for a long time. Prolonged ingestion of these foods can often cause long-term illnesses, such as heart disease, Alzheimer's and diabetes. Highly processed grains and sugars (such as cakes, cookies, breads and soft drinks) are particularly bad and experts advise against them.