Ergothioneine can regulate the REDOX reaction in cells and participate in the regulation of intracellular energy. It is a physiological protective agent of cells, with extremely safe and stable biological and pharmacological characteristics. Therefore, adding ergothioneine to the product can not only maintain the stability of other ingredients, but also promote the absorption of active ingredients by cells, which has a good synergistic effect and effectively enhances the efficacy of other ingredients to achieve the effect of 1+1>2. For example, the use of ergothioneine in antioxidant products, not only can itself play a strong antioxidant effect, but also can cooperate with other antioxidants to take effect, strengthen its vitality. High purity ergothioneine is extremely safe and can be used in pregnant women and sensitive muscles. Safety assessment based on clinical data, in accordance with EU and US regulations, has been approved for use in formula foods for pregnant women and infants to protect the health of mothers and babies.