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Serine alleviates oxidative stress via supporting glutathione synthesis and methionine cycle in mice

Mczka K, Stasiak O, Przybysz P, Grymowicz M, Smolarczyk R

Additionally, in a 30-day placebo-controlled trial in 300 adults (aged 18-65 years), supplementation with the B vitamins (at doses of about 3 to 13 times the RDA, excluding folic acid), vitamin C (1,000 mg/day), calcium (100 mg/day), and magnesium (100 mg/day) was associated with significant improvements in various scores of psychological stress compared to a placebo (139)

It can lead to a condition called kernicterus, a rare type of brain damage that can be fatal