A qualified health professional who specializes in nutrition and dietary planning; someone trained in dietetics.
From 'dietetics' + '-ist' (suffix meaning a person who practices or specializes). The profession emerged as a formal credential in the early-to-mid 20th century.
The first registered dietetists in the 1920s were revolutionaries—they insisted that food could scientifically treat diseases, shocking a medical establishment that relied almost entirely on drugs and surgery.
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