Fda Allergen Updates: Why Eggs and Dairy Stand on Separate Regulatory Ground

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Clear lines emerge when examining comparative anatomy. Dairy encompasses foods derived exclusively from the mammary glands of mammals. Cattle produce the vast majority of commercial dairy in North America, supplemented by smaller markets for goat, sheep, and water buffalo milk. These fluids represent nutrient-dense secretions evolved specifically to nourish newborn mammalian offspring before weaning.

Eggs represent an entirely separate category of animal byproduct. Laid by avian species, principally chickens, ducks, and quails, eggs are self-contained reproductive vessels containing a yolk and an albumen (egg white). Chickens possess no mammary tissue. They belong to the class Aves, whereas dairy-producing animals belong to the class Mammalia.

This evolutionary separation dictates every fundamental biochemical component of each food. Milk consists primarily of water, fat emulsions, milk sugar (lactose), and bovine milk proteins such as casein and whey. Eggs contain zero milk sugars and zero mammalian proteins. Instead, an egg's interior houses structural proteins including ovalbumin, ovotransferrin, and ovomucoid, wrapped inside a protective calcium carbonate shell. Consuming an unfertilized chicken egg introduces no mammalian biological compounds into human digestion.