Many online peptides are mislabeled, underdosed, or contaminated
Brothers SP, Wahlestedt C
Quercetin does more than help with gout
Additionally, a randomized, double-blind, placebo-controlled trial in 2,588 healthy older adults with mild hyperhomocysteinemia found that daily supplementation with 500 g of vitamin B 12 and 400 g of folic acid for two years reduced blood homocysteine concentrations but had no benefit on depressive symptoms in those with or without depressive symptoms at baseline (110)
The consistently reported poor diagnosis and treatment experience encountered in UK Primary Care by people with a diagnosis, or symptomatic of, Pernicious Anaemia in the UK is well documented and reported on in research carried out and published by the Pernicious Anaemia Society
Splitting into twice-daily injections is reasonable at higher daily totals (e.g., 250 mcg AM + 250 mcg PM at a 500 mcg/day total)