We know how hard it is to suffer from a B12 deficiency
You might notice improvements like feeling happier, having more energy, being less tired, and just generally feeling better
You have a strict vegan diet that doesnt fulfil your B12 needs
Supplier and product pages should be evaluated for third-party testing, batch-specific certificates of analysis, named laboratory verification, transparent pricing, realistic delivery expectations, payment security, refund policies, support quality, and consistent research-use-only labeling
The problem is what happened when it was actually tested in people
No significant difference in the prevalence of symptoms was found between participants with MMA levels 400 nmol/l (n = 60) and those whose levels were 600 nmol/l showed some improvement in neurological symptoms (Hvas, 2001b)