B12 is known to play a key role in numerous functions in the body, including (but not limited to): DNA and red blood cell formation Maintaining a healthy metabolism and digestion Synthesis of neurotransmitters and hormones Energy production Nerve cell health Gene and enzyme regulation Athletic prep or recovery Vitamin B12 shots may also help reduce the risk of the following conditions: heart disease, neurological function, stroke, cognitive functions such as thinking and memory, problems with fertility, and neural tube defects in children born to parents with a vitamin B12 deficiency
Concomitant deficiencies (iron, folate), chronic illness, or drug interactions may blunt clinical response and warrant further evaluation
B1 Thiamine : May support the immune system and energy conversion
This distinction matters because it affects how the compound is absorbed, distributed, and utilized by the body
These associations were independent of demographic, socioeconomic, lifestyle factors, use of medications that could have an effect on serum vitamin B12 levels, dietary supplement use and fasting time