Since God told Noah, "Every moving thing which liveth shall be meat for you; even as the green herb have I given you all things" (Gen. 9:3), isn't it permissible to eat whatever we want?

We might ask "was God giving Noah permission to eat snakes, rats, alligators, lizards, Worms, and cockroaches?" Certainly not! Noah already knew the difference between clean and unclean foods (Gen. 7:2). God was simply making a statement, "Noah, you may now eat flesh foods." The evidence for this is that God clearly forbade unclean animals later in both Lev. 11 and Deuteronomy 14.

Since God does not change His moral standards (Ps. 89:34) and since God's character does not change (Mal. 3:6) He did not give permission to Noah to do something He forbade Moses to do. All God's laws including those relating to health were given in love to reduce disease and increase happiness (Ex. 15:26). Many in the scientific community recognize that the health principles of the Bible can significantly assist in reducing both heart disease and cancer. God's ways are best.