A large number of studies have shown that almost all synthetic pigments cannot provide nutrients to the human body, and some synthetic pigments can even endanger human health, leading to reduced fertility, teratogens, etc. , and some may even be converted into carcinogens in the human body. Therefore, it should be Use natural pigments instead of synthetic pigments. If the following are true, the above conclusions can be weakened most:. ["The body's detoxification and excretion functions can dissolve some toxins in synthetic pigments.", 'The natural pigment composition is complex, and harmful substances may be generated due to structural changes during processing.', 'The tinting power of natural pigments is generally not as strong as synthetic pigments, and it is relatively easy to fade or discolor.', 'The extraction of natural pigments is not easy, the cost is high, and it is technically difficult to operate.']