A systematic review of studies into the reconstitution of formula feeds and an examination of the formula on sale in the UK has concluded that there is an urgent need to minimise the risk of incorrect preparation.
Only 5 studies since 1977 were identified for the review, but none was found to be of adequate quality. All found that feeds were inaccurately reconstituted. Thirty one different formulas were found on sale in one supermarket - scoop sizes varies and some preparations had never been tested.
Renfrew MJ, Ansell P, Macleod KL (2003). Formula feed preparation: helping reduce the risks; a systematic review. Arch Dis Child 88:855-8 [Abstract]