In recent years, many businesses have been instilling an idea in consumers that acidic body fluids are the root of all diseases, and they believe that acidic body fluids will lead to decreased immunity and are prone to colds and other infectious diseases. As a result, some health foods promote the effect of acid excretion, and some beauty salons even launched the "seaweed acid excretion" project. However, experts of Chinese and western medicine have refuted this, because the medical profession has never said that there is no acidic constitution. In the process of life activities, acid-containing metabolites (carbonic acid, lactic acid, etc. ) and the inevitable production of alkaline products in the body. However, the human body has three regulating systems, which can balance acid and alkali. The kidney can excrete excess organic acids through urine, and many acidic components will be excreted quickly through breathing. Body fluids also neutralize the acid-base balance. Therefore, the PH value of body fluids of normal organisms is always stable within a certain range, so the human body's constitution will not be acidic.

Yin Zhichao, a researcher at China Academy of Traditional Chinese Medicine, also said that Chinese medicine has no so-called "acid-base constitution". It can only be said that the human body may have symptoms of "yin deficiency" after ingesting too many acidic substances, such as deficiency heat, night sweats, drowsiness and so on. However, not all these symptoms are caused by acidity.