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Inhibiting glutamine pathway, including downregulating glutamine transporter ASCT2 [84] or inhibit glutaminase by CB-839 [85] can deplete intracellular GSH, but such effect of CB-839 was only observed in cancer cell lines expressing xCT supplied with high cystine in the culture [86]

Taking too much selenium leads to selenosis with symptoms like: Hair and nail loss Garlic breath and metallic taste Nausea and digestive disturbances Skin rashes and fatigue Nervous system problems [5] Research shows cancer risk follows this U-shaped pattern too

When it does this, it helps raise your metabolism

Cochrane Database Syst Rev 2021;4:CD004407.51