true nutrient retention factor 2021-05-20T23:00:12Z "Thus, the direct measure of true retentions requires data on the weights of the food both before and after cooking, as well as the contents of the nutrient per gram (or other unit of weight) of raw and cooked food." - Comparisons of Methods for Calculationg Retentions of Nutrients in Cooked Foods.(https://pubmed.ncbi.nlm.nih.gov/1238446/) A food datum which is the proportion of a nutrient remaining in a cooked food in relation to the amount of that nutrient present in a given weight of the food before cooking. food datum ready for release