If you experience fatigue, weakness, memory problems, or have a diet low in B12 (e.g., vegetarian or vegan diets), you might need a supplement
USDA National Nutrient Database for Standard Reference Release 28
B12 can also lead to improved mental functions like memory and concentration, better sleep, less stress, and even healthy skin, hair, and nails
Taking regular B12 shots can reduce your risk of complications from osteoporosis
What observational cohorts actually show Unexplained high B12 has been linked to a later cancer diagnosis, concentrated in the months after the test
Mild nausea and digestive discomfort Some users report mild nausea, particularly when injecting on an empty stomach first thing in the morning