B12 is essential for various bodily functions, including energy production, red blood cell formation, and nerve health
Taking both together makes sense for most people, though folate status should be adequate before starting high-dose b12 to avoid masking folate deficiency
Reduced Risk of Health Problems A vitamin B12 deficiency is associated with serious health complications such as heart disease, vision loss, infertility, and neuropathy
Other counterions should not be assumed equivalent without evidence
doi:10.3109/14767058.2015.1049149 [69] Paesano R, Berlutti F, Pietropaoli M, et al
If you are concerned about fatigue, low testosterone, or nutrient deficiencies, the most reliable approach is to undergo appropriate lab testing and medical evaluation