I used to take only a baby aspirin a day and nothing else. Recently, while recovering from surgeries and not having my usual diet, I took a multivitamin pill to make sure I had enough and that was it. Not a vegan, but I normally eat huge amounts of vegetable. My salad plate often looks like what you would feed a family of four. It is not for health reasons as much as I need it as a non-caloric filler to satisfy my voracious appetite and not gain weight (BMI of 23 as I speak).
My mother-in-law is a vegan and my wife gets her some B-12 to make sure she is not deficient. Recently, out of curiosity I looked at the label, and holy mackerel, each pill supplies something like 1000X the recommended daily requirement! I asked my wife if she knew if this was really needed. So, we switched to something that was a mere 100X the requirement.
One of my relatives had vitamin D deficiency that caused her a lot of health problems, until her doctor figured this out. She had been avoiding the sun, and did not spend enough time outdoors. How could one expect vitamin D deficiency in a young person in a place where the sun shines 99% of the time? Obviously, if she had taken a multivitamin pill a day, it would save her from much misery and expenses too.
