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Description
It was designed as a modified version of the C-terminal portion of human growth hormone (hGH)

For potential skin irritation management, see copper peptides and skin reactions
Ashcroft, T., Simpson, J

On the other hand, those with methylation issues (MTHFR gene mutations carriers, for instance) do best on methylated B12, that is, methylcobalamin

Recent studies indicate a link between blood-brain barrier dysfunction and cognitive decline and might accelerate Alzheimer's disease progression
