The evidence shows no meaningful benefit for healthy people with normal B12
Mental health chronic stress, anxiety, depression also drives fatigue that no vitamin will fix on its own
(the New York Times) - behind the Headlines - NLM. NCBI, www.ncbi.nlm.nih.gov/search/research-news/8501/
Here are just a few key functions of B12: Supports red blood cell formation and oxygen transport Helps maintain nerve function and brain health Plays a role in mood regulation and focus Supports energy metabolism and fat/protein breakdown When your body doesnt get enough, symptoms like fatigue, brain fog, irritability, and weakened immunity often show up
Most people then feel either neutral or noticeably better as the deficiency corrects
A case study involving a 1-year-old girl treated for Vitamin B12 deficiency reported the onset of involuntary myoclonic movements after starting intramuscular Vitamin B12 therapy