Clinically effective - optimum levels of vitamin B12 as methylcobalamin and adenosylcobalamin (500mg) for mental health and wellbeing, energy and reduction of tiredness and fatigue. Optimum support - optimally absorbed, high potency nutrients using the best and easiest nutrient forms for the body to absorb and use. Pure - in a simple, purified water base with no unnecessary additives. Contains only what you need. Flexible - only use what you need, easily mixed into liquids or taken under the tongue, and convenient to use on the go. Especially suited to individuals who have difficulty swallowing tablets or capsules, those with digestive and absorption. Difficulties. All-vegan ingredients. 43 days' supply at 6 drops per day.