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When the body lacks sufficient B12, it can disrupt normal hair growth cycles and cause rampant shedding
[3] Cyanocobalamin, more common in oral supplements, contains a cyanide molecule that is released during metabolism
The diagnosis of vitamin B12 deficiency typically relies on low total B12 levels and elevated concentrations of homocysteine (Hcy), as well as levels of transcobalamin-bound B12 (holoTC) and methylmalonic acid (MMA), which serve as functional indicators of cobalamin insufficiency (Carmel and Sarrai, 2006)
[3] Prolonged therapy can unmask or exacerbate benign prostatic hyperplasia, raise prostate-specific antigen, worsen untreated obstructive sleep apnoea and is associated in some observational studies with a small but controversial increase in cardiovascular events, underlining the necessity for baseline and periodic monitoring of PSA, lipids and cardiovascular risk factors
