Reviews B12 information for accuracy
These include the bell-shaped dose-response curve, central effects after peripheral administration, a delayed and prolonged time course, and some penetration of the blood-brain barrier in essentially intact form
Deficiency is more common than many people realise particularly in those following plant-based diets, individuals with gastrointestinal conditions affecting absorption, and older adults
If a doctor prescribes B12 injections, symptoms like fatigue, weakness, depression, and more may resolve within generally resolve in six to 12 weeks
Some early work reported favorable effects on fat metabolism, while larger later trials did not produce the weight loss outcomes needed for approval
Vitamin B12 comes in three different forms: Some doctors may use cyanocobalamin , which is a much cheaper form of Vitamin B12 that needs to be converted by the body to be used