ProVen Probiotic Fit For School Sticks (28 x 1.5g). Friendly bacteria and vitamins C and D developed specifically for children. ProVen Probiotics Fit for School stick packs have been specially formulated for children aged 1-16 years old.. Each stick pack contains 12.5 billion of the unique Lab4 acidophilus and bifidus friendly bacteria combined with vitamins C and D to provide support for your child‚Äôs immune function.. ProVen Probiotics Fit for School was used in the ProChild study, which took place over a six-month period throughout autumn and winter. The product is also available in chewable tablet format, with each chewable tablet containing 12.5 billion friendly bacteria and vitamin C.. Easy to use individual one-a-day stick packs. ProVen Probiotics Fit for School stick packs are provided as single one-a-day powder sachets that can be taken straight from the pack or are easy to add to food or drink. They are sweet to taste and are sweetened only with prebiotic FOS (fructooligosaccharides) fibre, which helps to feed the friendly bacteria.. Key features. 12.5 billion Lab4 friendly bacteria per stick pack. With vitamins C and D to support immunity. Also contains prebiotic FOS fibre. Does not require refrigeration