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Most people are deficient in the vitamin, which varies by age
However, taken orally, it easily crosses the blood-brain barrier, unlike serotonin
Roux-en-Y gastric bypass contributes to weight loss-independent improvement in hypothalamic inflammation and leptin sensitivity through gut-microglia-neuron-crosstalk
Three years in, Im still taking less than 1 mg. For comparison, people with type 2 diabetes typically take 0.25 mg for the first month, 0.5 mg for the second month, 1 mg for the third, and 2 mg for the fourth month and beyond
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