The B complex are a group of essencial vitamins which are needed to maintain a healthy nervous system. This high strength preparation is particularly suitable for those who do a lot of exercise, thise who feel fatique or people who eat a poor diet. Quantity Price: £6.79 You may also be interested in... Think Natural Hawthorn Berry 500mg 60s   £4.00 Think Natural High Potency B Complex 30s   £3.89