Relating to or designed for a special diet, especially one meant to treat a medical condition or manage weight.
From Greek 'diaita' (way of living, diet) through Latin 'dieta', with the suffix '-ic' meaning 'relating to'. The word has been used since ancient medical writings.
The ancient Greeks used 'dieta' not just for food but for your entire lifestyle—sleep, exercise, emotions—so they understood that health wasn't just about what you ate but how you lived, something modern medicine is only recently rediscovering.
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