Left porridge is a diet porridge made of jujube, medlar, yam, Poria and other raw materials. It is a diet regimen to improve physical fitness in traditional Chinese medicine. There are records about detoxification of red dates and yam in Huangdi Neijing. Left porridge is a famous dietotherapy prescription to improve obesity and shape the body. It can also invigorate qi, enrich blood, remove acne, whiten skin and regulate endocrine.