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Vitamin B12 and brain fog
Second: the short plasma half-life (~30 min) was insufficient, by the time the fragment circulating in the blood was supposed to act, it had already been metabolized
DSIP Research Delta sleep-inducing peptide (DSIP) is a neuropeptide consisting of nine amino acids (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) that was first isolated from the cerebral venous blood of rabbits during sleep in the 1970s
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