A vendor with strong overall scores can rank low on a specific peptide if their COA for that compound is weaker, their per-mg pricing is uncompetitive, or they only carry the peptide as part of a blend rather than standalone
The study of pernicious anemia patients with relapse of anemia (Figure 10) (53) has shown that the depletion of serum vitamin B-12 after folic acid administration is accompanied by a proportional increase in reticulocyte counts, suggesting that serum vitamin B-12 is diverted into the hematopoietic system to provide the necessary vitamin B-12 coenzyme for methionine production
Researchers looking to buy Melanotan II for research should first review RUO labeling, batch-specific COA availability, peptide identity records, HPLC purity data, LC-MS or mass spectrometry confirmation, lot traceability, and supplier documentation consistency
Ricard, C
Amsterdam, Oxford, New York, Elsevier Science Publishers, pp 67-115