FAQs
To raise or keep up B12 in adults with low or borderline levels. That includes vegetarians who eat little dairy, adults over 50 and people on long-term metformin or acid-reducing medicines. A 2019 review of 31 studies found metformin users had about twice the risk of low B12.
Not clearly. A 2024 review of 13 studies with 4,275 patients found no significant difference between oral, sublingual and injected B12 in raising B12 levels. Choose the format you will take every day.
Because only a small share of a large dose is absorbed. Your gut's main B12 route fills up at about 1.5 to 2 mcg per meal. Above that, roughly 1% to 2% of the dose gets in by passive diffusion.
Forte suits low or borderline B12. The 500 mcg tablet suits everyday upkeep. A B12 blood test and your doctor's advice are the best guide.






