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Abnormal essential fatty acid levels in plasma of women with premenstrual syndrome
After a B12 shot, blood levels rise well above the desired range (150-700 pmol/L in most places), and stay high for a while

[DOI] [PubMed] [Google Scholar] 17.Furukawa T., Meydani S.N., Blumberg J.B

Die Pharmazie-An International Journal of Pharmaceutical Sciences , 67 (2), pp.124-130

Topical GHK-Cu is regulated as a cosmetic ingredient (no FDA premarket approval required for cosmetics)

doi: 10.1124/jpet.115.230201
