A system, software and a method for estimating the Glycemic Load of foods are provided. A multivariate statistical analysis is performed on a known data set of Glycemic Load values for foods to yield a mathematical relationship that best fits the data. The mathematical relationship is then used to calculate an estimation of the Glycemic Load when a food's Glycemic Index (and, hence, Glycemic Load) is unknown based on the food's levels of known nutrients. The estimated Glycemic Load can then be applied to dieting.