One Nutrition - B12 Max Spray (30ml). Be more you: this highly absorbable vitamin B12 spray supports your immune system, energy levels and red blood cell formation.. Contributes to the normal function of the immune system. Contributes to the reduction of tiredness. Recommended for vegetarians & vegans. Did you know that vitamin B12 is only found naturally in animal sources such as: fish, eat, eggs and dairy products? Plant foods contain no vitamin B12, unless they have been fortified. Those following a meat free or plant based diet can have trouble reaching the daily recommended intake.. One Nutrition B12-Max is a simple and convenient way to top up vitamin B12 levels.. How to take: Adults take 1 to 6 (max) sprays daily. For enhanced absorption spray under the tongue and hold for 30 seconds before swallowing.