Free-range eggs put in the sun in sunny-side-up.
Eggs from chickens that are allowed to roam rather than being kept in dark sheds or cages pack more vitamin D, says a study from the University of Reading’s “Food Chemistry” journal in the United Kingdom.
Scientists analyzed the contents of 270 eggs sold at U.K. supermarkets and found that free-range eggs had 30% more vitamin D than eggs from birds kept locked up.
Vitamin D, known as the sunshine vitamin, is primarily absorbed through exposure to sunlight. And the free-range chickens had more time in the sun.
Only a few foods, including eggs (specifically the yolk), are a good source of vitamin D. Other natural sources include red meat, liver, tuna, herring, salmon, and shrimp. Vitamin D is often added to milk, cereal, and yogurt.
The study in the U.K. was focused on determining the importance of correct food labelling when purchases are made via the “production system.”
Vitamin D helps prevent rickets, regulates calcium intake and the immune system, and can help fight depression.