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the methyl group at the 1-position and the amino group at the 5-position appear important for inhibitory activity
In limited data it's generally reported as well-tolerated, but human safety data is still limited and long-term effects aren't fully characterized
The Financial Case for Injection Therapy For people with a confirmed deficiency, especially those with an absorption problem, injections can be a sensible choice compared to pills
PubMed , StatPearls , StatPearls Publishing, 2025
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