Eye Health

Updated 01 February 2016

Eat eggs with your veggies for good eyesight

You can protect your eyes from age-related macular degeneration by regularly combining foods high in carotenoids, such as carrots and oranges, with eggs in your meals. Here's why.

0

Two decades of follow-up of more than 100,000 participants in the Nurses’ Health Study and the Health Professionals Follow-up Study finds that higher intake of bio-available carotenoids, particularly lutein and zeaxanthin and alpha-carotene, is associated with a reduced risk of advanced age-related macular degeneration (AMD).

“Because other carotenoids may also have a protective role, a public health strategy of increasing the consumption of a wide variety of fruits and vegetables rich in carotenoids could be most beneficial and is compatible with current dietary guidelines,” writes Dr Juan Wu, of the Harvard TH Chan School of Public Health, Boston in a recent article in the Journal of the American Medical Association.

These findings add to the existing body of evidence that carotenoids play an important role in preventing AMD.

Broadly speaking, carotenoids are plant pigments responsible for bright red, yellow and orange hues in many fruits and vegetables. Foods that are high in carotenoids include carrots, squash, oranges, grapefruit and apricots.

Read: Carotenoids cut lymphoma risk

Research has also shown that consuming cooked whole eggs with raw vegetables greatly increases absorption of a variety of carotenoids, including lutein, zeaxanthin and alpha-carotene.

A study assessing the effects of egg consumption on the absorption of carotenoids from a raw mixed vegetable salad found that when the salad was consumed with 3 whole cooked eggs, the absorption increased 3-9 fold.

A study involving 33 men and women consuming 1 egg per day for 5 weeks reported increased serum lutein (26%), and zeaxanthin (38%), but serum concentrations of total cholesterol, LDL (bad) cholesterol, HDL (good) cholesterol and triglycerides were not affected.

In another study it was reported that daily intake of 3 eggs for 12 weeks increased the lutein and zeaxanthin by 21% and 48%, respectively in 20 adults.

Thus, egg yolk could be an important dietary source to improve lutein and zeaxanthin status for the prevention of AMD in adults.

Read: The many health benefits of eggs

Increasing age is the dominating factor for the onset of AMD because of physiological and biochemical changes due to old age.

Eggs are an affordable source of these essential nutrients for the elderly and together with fruit and vegetables, may be an important strategy to help prevent and manage AMD.

Read more:

The 10 health benefits of eggs

Carotenoids boost iron absorption

Your complete guide to vitamin A

Sources:

1. Eye nutrition in context: mechanisms, implementation and future directions, Demmig-Adams, B & Adams, R B. Nutrients 2013; 5:2483 – 2501, www.mdpi.com/2072-6643/5/7/2483/pdf

2. Dietary sources of lutein and zeaxanthin carotenoids and their role in eye health, El-Sayed M. Abdel-Aal et al. Nutrients 2013; 5: 1169 – 1185, http://www.mdpi.com/2072-6643/5/4/1169/htm

3. Gordan S L et al. Effects of egg consumption on carotenoid absorption from consumed raw vegetables. Kim J E,  Am Jnl Clin Nutr. 2015; 102(1):75 – 83.

4. Harvard Medical School, Intakes of lutein, zeaxanthin, and other carotenoids and age-related macular degeneration during 2 decades of prospective follow-up  JAMA Opthalmology Oct , 2015 (abstract)  Willett W & Wu J, http://eye.hms.harvard.edu/publications/intakes-lutein-zeaxanthin-and-other-carotenoids-and-age-related-macula

5. Nurse's health study, http://www.channing.harvard.edu/nhs/

6. Harvard School of Public health, Health professionals follow up study, https://www.hsph.harvard.edu/hpfs/

 

Ask the Expert

Optometrist

Megan Goodman qualified as an optometrist from the University of Johannesburg and is currently practising at Tygerberg Academic Hospital in Cape Town. She has recently completed a Masters degree in Clinical Epidemiology at Stellenbosch University. She has a keen interest in ocular pathology and evidence based medicine as well as contact lenses.

Still have a question?

Get free advice from our panel of experts

The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.

* You must accept our condition

Forum Rules