Warnings Patients with early Leber's disease (hereditary optic nerve atrophy) who were treated with cyanocobalamin suffered severe and swift optic atrophy
Then, she repeated this evaluation after 1 month, and again after 6 months
JAMA, 302(19), 21192126
Vitamin B12 Injection Side Effects Vitamin B12, an essential nutrient, plays a pivotal role in maintaining nerve function, red blood cell formation, and DNA synthesis
Here's the TL;DR on vitamin timing: while there is no official medical advice dictating that you should take vitamin supplements at a specific time of day to improve their efficiency, there is quite a lot of research showing that avoiding some vitamin supplements at particular times (or more accurately, with particular meals) can improve absorption, or that taking some vitamins alongside food can reduce the risk of adverse side effects
Low NAD+ makes it harder to respond to infections and clear damaged cells