Experts have settled the long-standing question of whether white and brown eggs differ in any meaningful way: the only difference is the breed of hen that lays them. Taste, nutrition, and cooking performance are identical.
Why Sainsbury's Is Switching to White Eggs
Sainsbury's announced in June that it will exclusively stock white eggs, citing environmental reasons. The supermarket says white eggs have a 12.7% lower carbon footprint than brown eggs because hens that lay white eggs consume less feed while producing the same number of eggs.
UK consumers eat about 14.5 billion eggs annually, generating an estimated 4.35 million tonnes of CO2. If the whole industry matched Sainsbury's reduction, emissions could fall by over 550,000 tonnes per year—equivalent to removing nearly 300,000 cars from the road.
What Determines Eggshell Color?
Richard Mew of Bird Brothers, a Bedfordshire egg producer, said: "The difference between white eggs and brown eggs is simple: white eggs come from white hens, while brown eggs come from brown hens. But when it comes to taste and cooking instructions there is no difference."
Henry O'Connor of Better Eggs added: "White eggs are mostly laid by hens with lighter feathers and earlobes, while brown eggs usually come from darker-feathered hens with red earlobes. That's it. The difference is purely cosmetic - it has zero impact on what's inside the egg."
Charlotte Thomas of RSPCA Assured echoed: "It sounds strange but it's true - the colour of a hen's earlobes will often match the colour of her eggs." The British Egg Information Service confirmed: "In general, white hens produce white eggs and brown hens brown eggs."
No Difference in Quality or Nutrition
Henry O'Connor said: "Despite what many shoppers believe, shell colour has nothing to do with quality." Kathy Beget of Beyond the Chicken Coop, with over 20 years of raising chickens, added: "The quality and taste of the eggs do not vary by colour. Instead, the quality varies by how the chickens are raised and what they are fed."
Destini Moody, a sports dietitian, said: "White and brown eggs are essentially the same. You're getting high-quality protein, strong amino acid profile and nutrients like choline, vitamin B12, iodine and selenium."
The British Egg Information Service stated: "There are no nutritional differences between brown or white eggs. Eggs are a natural, nutritionally dense food containing vitamins, minerals and high-quality protein in less than 80 calories, whatever the colour."
Taste and Cooking: Identical
Katie Vine of Dinners Done Quick said: "Any differences in flavour come from the chicken's diet, the freshness of the egg, or how it's prepared, not from the egg shell colour." Edmund McCormick of Cape Crystal Brands noted: "Blind taste testing has shown that people are unable to distinguish between white eggs and brown eggs."
Paul Mason of Prep Kitchen said: "From a cooking point of view, there's no difference. They behave exactly the same whether you're scrambling, poaching or baking."
Why White Eggs Are More Sustainable
Richard Mew explained: "White hens have a more docile nature, meaning they are easier to manage, more feed-efficient, and are capable of producing eggs over a longer laying cycle than brown hens. These behavioural traits bring improved efficiency and ultimately make white eggs a more sustainable option."
Eggs remain a nutritious choice. Science firm Zoe said: "The humble chicken egg is a nutritional powerhouse... It contains a wide range of micronutrients, including all essential trace elements."
