J Mol Cell Cardiol (2009) 47:44555
Both of these agents deserve respect, and the safety data is there to support their use under proper medical guidance
Hydroxocobalamin, the form most commonly used in the UK, may cause: Injection site reactions (pain, redness, or swelling) Temporary reddish discolouration of urine Rarely, hypersensitivity reactions Very rarely, hypokalaemia in severely deficient patients when treatment is initiated (potassium levels should be monitored in severe deficiency) B12 injections are considered very safe, with no upper tolerable limit established, as excess B12 is excreted in urine
But what are its effects in the body
The stimulatory effect of hCG on amino acid uptake by amphibian follicles [PMID: 24566] Laboratory literature summary: The stimulatory effect of hCG on amino acid uptake by amphibian follicles
Most cosmetic actives have a 10-fold to 100-fold therapeutic window