The other benefit to using NMN is that it doesn't cause the flushing effect commonly associated with niacin, making it more comfortable for those who are sensitive to skin reactions
Bottom line on safety: If someone considers peptide therapy, it should be under medical supervision with pre-treatment screening (baseline GH/IGF-I, metabolic panel, glucose), ongoing monitoring, and sourcing from reputable, traceable suppliers under a lawful framework
Spine 13 , 173178 (1988)
Determination of L-carnitine in biological fluids and tissues
If the hemoglobinuria has already subsided and the history is uncertain, one is faced instead with the much wider differential diagnosis of AHA
Lillig CH, Lonn ME, Enoksson M, Fernandes AP, Holmgren A