fda bpc-157 not approved human use aka Wolverine. This peptide is FDA-approved, but it is very popular among the biohacking population. Ashley explains the science behind it, but remember, it doesn't have data yet, so BPC-157: The Real Reason Why
Description
clinical evidence in humans is insufficient to draw conclusions about efficacy or safety in therapeutic contexts

There are no biosimilar alternatives, which are often less expensive

In animals, it has been demonstrated to reduce AGE formation and content in the kidneys at doses ranging from a human equivalent of about 795 mg to about 1.1 g daily (Karachalias 2010

Then one of the ones I switched to stopped carrying the formulation I needed

Yes, B12 injections are often used to combat fatigue and brain fog, especially in individuals with a deficiency

In other words, generic medications have the same pharmacological effects as their brand-name counterparts