FAQs
It keeps vitamin B12 topped up in people who get too little from food, such as vegetarians, adults over 50 and people on metformin or acid-reducing medicines.
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.
Only about 1% to 2% of a dose this size is absorbed, so 500 mcg gives you roughly 5 to 10 mcg.
No official upper limit has been set for B12, because its potential for harm is low. Take one tablet a day, and check with your doctor if you take other medicines.





