In this 1953 speech, Dr. Ralph Bircher—son of the famous Maximilian Bircher-Benner who created the raw Swiss health food muesli—explains the science behind raw foods and why a diet of processed foods leads to “mesotrophy,” a state in which a person eating such foods continues to function almost free of symptoms as degenerative disease silently develops within. Seventy years later, this talk is still years ahead of its time!