“We believe that the case is closed — supplementing the diet of well-nourished adults with (most) mineral or vitamin supplements has no clear benefit and might even be harmful,”
Key word there is “well-nourished”.
Eat good meals and you do not need vitamen supplements, in fact they can be harmful. People who eat them like candy are in danger of over-dosing.
Eat a decent diet, you will be fine. I’m far from vegan, I eat lots of meat along with plenty of veggies, I’m fond of brussel sprouts and lima beans, but whatever suits your taste.
red wine, dark chocolate laced with chili and sometimes almonds are my choice of supplements...