One of the biggest concerns is the amount of added sugars in our diets, which are often hidden in foods. Although ice cream cake is an obvious source of sugar, other foods that may not even taste sweet -- such as salad dressings, tomato sauces and breads -- can be loaded with the white stuff. Many alternative medicine practitioners promote various types of detoxification such as detoxification diets. Scientists have described these as a "waste of time and money". Sense About Science, a UK-based charitable trust, determined that most such dietary Slender Quick AR claims lack any supporting evidence. In cases of kidney failure, the action of the kidneys is mimicked by dialysis; kidney and liver transplants are also used.