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PMID: 34072318

It is not scheduled under the Controlled Substances Act, but products marketed as "MK-677" capsules or powders are unapproved drugs under FDA rules, and in practice it is sold almost exclusively online as an unregulated "research chemical" labeled not for human consumption

By MATTHEW PERRONE, AP Health Writer WASHINGTON (AP) More Americans are injecting themselves with unapproved chemicals that are pitched as ways to build muscle, rejuvenate skin and extend life, the latest example of the nations fascination with alternative therapies and wellness hacks

B vitamins, including B1 (thiamine), B2 (riboflavin), and B12, also lose potency relatively quickly, especially if exposed to unfavorable storage conditions