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Lyophilized powder Unreconstituted GHK-CU powder remains stable for years when frozen at -20C or below
127 Another clinical trial in 50 patients with tinnitus, half of whom also had hearing loss, found treatment with intramuscular injections providing 100 mg vitamin B1, 100 mg vitamin B6, and 1,000 mcg vitamin B12 twice weekly led to tinnitus improvement mainly in those without hearing loss
The recovery period for B-12 injections is typically very short, with most patients experiencing minimal to no downtime
Ferritin above 100 mcg/L suggests chronic disease anemia
The synthesis constitutes a formal total synthesis, since the research groups only prepared the known intermediate cobyric acid, whose chemical conversion to vitamin B 12 was previously reported
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