As a vegan, plant-based triathlete, I have to supplement it. So, I recently bought a jar of low dose (48 mcg per day of B12) Cranberry Gummies to try. I found them a bit too sweet compared to the tablets I usually take. The hassle of remembering to take them daily proved to be a pain. Instead, I'll continue taking 5000 mcg Cherry tablets of Vitamin B12 once every two weeks. They are more convenient, tastes less sweet and take up less space.
I haven't experienced any side-effects of higher Vitamin B12 doses yet even after taking it over the last three years. I did find feeling more fatigued and low energy when I forget to take them.
Has anyone else found a more definitive answer to this Vitamin B12 question?