Greenish Colour in Egg White

Correct Answer: Riboflavin

Riboflavin (Vitamin B₂) is responsible for the characteristic greenish-yellow tint of egg albumin (egg white). Riboflavin is a yellow-green fluorescent pigment naturally present in egg white.

Egg Colour Chart

• Yolk yellow/orange: Carotene and xanthophylls
• Albumin greenish tint: Riboflavin (Vitamin B₂)
• Darkening of hard-boiled yolk: Iron sulfide (FeS) — from H₂S reacting with iron
• Skin/shank yellow: Xanthophyll deposited from feed

The riboflavin content of egg white also makes eggs a good dietary source of Vitamin B₂, contributing to energy metabolism and maintenance of mucous membranes.