Eggs are a rich source of

Concept

Foods are nutritionally classified by their dominant macronutrient — carbohydrates (the body's main energy source), proteins (amino-acid chains that build and repair tissue), fats (a concentrated energy store), and fibre (indigestible plant bulk that aids digestion). A food is called a rich source of whichever nutrient it supplies in the largest, most nutritionally significant amount.

Application

The edible portion of an egg, white and yolk together, is dominated by protein carrying a complete essential-amino-acid profile; one whole egg supplies roughly 6 grams of high-quality protein. This is why nutrition references such as the ICMR-NIN dietary guidelines and NCERT science textbooks group eggs with pulses, meat, fish, and milk as protein-rich foods. Eggs supply almost no dietary fibre, since fibre comes specifically from plant cell walls and eggs are animal-derived, and only a trace of carbohydrate. The yolk does carry some fat, but fat is not the nutrient eggs are classified or recognised for.

Cross-check

Standard nutrition classifications separate protein-rich foods, such as pulses, meat, fish, milk and eggs, from carbohydrate-rich foods, such as cereals and grains, and fibre-rich foods, such as vegetables, fruits and whole grains. This grouping confirms protein as the correct classification for eggs.

Why the other nutrient categories do not fit:

• Fibres come from the cell walls of plant foods, such as vegetables, fruits, whole grains and legume skins; eggs are animal-derived and carry no significant fibre.

• Carbohydrate is the dominant nutrient in cereals, grains, and starchy foods; the carbohydrate content of an egg is negligible.

• Fat is present in the egg yolk in a moderate amount, but nutrition guidelines classify eggs primarily by their protein content, not their fat content.