quality:corruption, structural:scholar_edition
Medical

Although the reason for kashrut is that it is a decree from the Torah, there have been attempts to provide scientific support for the view that Jewish food laws have an incidental health benefit. One of the earliest is that of Maimonides in The Guide for the Perplexed.

In 1953, David Macht, an Orthodox Jew and proponent of the theory of biblical scientific foresight, conducted toxicity experiments on many kinds of animals and fish. His experiment involved lupin seedlings being supplied with extracts from the meat of various animals; Macht reported that in 100% of cases, extracts from ritually 'unclean' meat inhibited the seedling's growth more than that from ritually 'clean' meats.

At the same time, these explanations are controversial. Scholar Lester L. Grabbe, writing in the Oxford Bible Commentary on Leviticus, says "n explanation now almost universally rejected is that the laws in this section have hygiene as their basis. Although some of the laws of ritual purity roughly correspond to modern ideas of physical cleanliness, many of them have little to do with hygiene. For example, there is no evidence that the 'unclean' animals are intrinsically bad to eat or to be avoided in a Mediterranean climate, as is sometimes asserted."