l-carnitine and afib Role of in Cardiovascular Health: Literature Review Enhanced Mitochondrial Calcium Uptake Suppresses
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2021;51:e13541

While injections are less expensive, they are not directly comparable

[DOI] [PMC free article] [PubMed] [Google Scholar] 131.Mkinen PL, Mkinen KK

Attempting to 'catch up' with higher doses risks gastrointestinal side effects (nausea, cramping) from rapid peptide absorption without improving skeletal outcomes

M., Grasset, E

doi:10.1001/archpedi.160.9.933