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one study looked at 300mg twice daily

Reference standards typically appear as a fine lyophilized powder with a characteristic blue tint when adequate copper is bound visual confirmation, though not a substitute for HPLC and mass spectrometry

Cell 174 (4), 780784 (2018)

Natl Sci Rev 9:nwab200 Zhang Y, Ye P, Zhu H, Gu L, Li Y, Feng S, Zeng Z, Chen Q, Zhou B, Xiong X (2024) Neutral polysaccharide from Gastrodia elata alleviates cerebral ischemia-reperfusion injury by inhibiting ferroptosis-mediated neuroinflammation via the nrf2/ho-1 signaling pathway

Furthermore, inflammatory cytokines induce the activation of indoleamine 2,3-dioxygenase (IDO), an enzyme that catalyzes the production of kynurenine from tryptophan, thereby reducing the alternative metabolic pathway that yields 5-HT (Raison et al., 2010