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These findings clearly show that GPX1 is irreplaceable by other selenoproteins in protecting against systemic oxidative stress, and GPX1 has a significant antioxidant function in the body ( FIGURE 1 On the surface, the mice after GPX1 KO performed normally, but these mice were susceptible to the production of oxidative substances, and when stimulated, they were easy to cause harm to mice and increase oxidative stress in vivo

However, human evidence is still limited

Epithalon and Melatonin Research suggests a connection between Epithalon and melatonin, a hormone associated with sleep regulation

So the expiry dates is after the same period which had been used for the original test

10.3389/fendo.2022.851941 68 WangR