Vitamin B-12 dosage
How do I know what dosage of B-12 I need? I am 75, in relatively good health, but obese with a big belly. My wife is 72, has sugar diabetes type 2 ( on Metformin), congestive heart failure ( under control) . Her weight is normal. She feels dizzy a lot.
We both feel tired, with no energy all the time. Someone suggested we get on B-12, but at our age, I was wondering about the dosage per day and a brand you could suggest.