Euryphagy is the practice of eating a wide variety of foods — the opposite of specialised or restricted feeding. In biology it describes omnivores and generalist feeders that range across many food types; in human nutrition it names the varied, diverse diet that dietary guidelines recommend. The nutritional logic is straightforward: no single food supplies everything, so variety covers the gaps — different foods bring different vitamins, minerals, amino acids, and phytochemicals, and a broad diet is insurance against deficiency. Euryphagy is also the evolutionary story of humans: the adaptable omnivore outlasted the specialists. Modern food systems make euryphagy easier than ever — global supply chains put variety on every shelf — while modern eating habits, paradoxically, often narrow it to a handful of ultra-processed staples.