B-12 - contraindicated in Lebers disease (optic atrophy)
Light exposure: Minimize exposure to direct light during handling
For severe cases, a bigger dose might be given first, followed by smaller doses later
For most people, expect about one to two weeks of noticeable effects, with the exact timing shaped by your levels, metabolism, diet, absorption, and age
Instead, experts recommend that you take specific B12 pills which contain around 1,000 micrograms of B12 each day, as opposed to the approximate 250mg in regular supplements
In contrast, fat-soluble vitamins can build up in bodily tissue and cause overdose symptoms