Natures Aid¨ Vitamin B12 provides 1000mcg per tablet. Vitamin B12 contributes to: the reduction of tiredness and fatigue normal red blood cell formation. Normal energy yielding metabolism Normal function of the nervous system Normal psychological function Natures Aid Vitamin B12 tablets are a sublingual supplement, which means they are designed to be dissolved and absorbed under the tongue, bypassing the digestive system, for maximum absorption.