Vitamin B12 plus other B Vitamins, Vitamin C, and metabolism-increasing amino acids help boost energy, immune system and metabolic rate PLUS aid with regulating sleep, mood and appetite.
There are certain factors may mean your body needs more B vitamins. These include age, pregnancy, dietary choices, medical conditions, genetics, medications, and alcohol use.
B vitamins are water-salable, which means your body does not store them. For this reason, your diet must supply them each day. To maintain B Vitamin levels high doses of oral supplements need to be taken daily vs weekly or even monthly intramuscular injections.