What foods should we eat to protect or even improve our good eyesight?
Which foods can improve eyesight?
Foods rich in these nutrients can preserve your good vision and reduce the risk of certain eye diseases.
What is beta-carotene?
Beta carotene is a red pigment. Most noteworthy, it’s found only in plants. Many fruits and vegetables are good sources.
Beta-Carotene is a member of the carotenes. They are powerful antioxidants. Moreover, it’s the most common form of carotene.
Beta-carotene, vitamin C, and vitamin E are antioxidant vitamins.
The human body converts beta carotene into vitamin A. Vitamin A is also called retinol. As beta-carotene, is converted into vitamin A in the body, it’s also called provitamin A. There are other carotenoids, but beta-carotene is the most popular and well-studied.
Can food cause vitamin A toxicity?
We can consume two types of vitamin A from food:
- preformed vitamin A, only in animal products and
- provitamin A carotenoids. The most popular is the beta-carotene. Only in plants.
Vitamin A from animal products is metabolized easily in the body, to active forms of vitamin A. On the contrary, the conversion of beta-carotene to vitamin A isn’t effective.
Vitamin A is a fat-soluble vitamin. It is stored in the liver. If you consume regularly animal products high in vitamin A, you may accumulate vitamin A in your body.
According to the National Institutes of Health, we shouldn’t consume more than 3 mg of vitamin A from animal sources.
Moreover, you should be careful, if you take vitamin supplements. Supplements can cause vitamin A toxicity.
Vitamin A toxicity may be dangerous. For instance, it can cause headaches or liver damage. Most noteworthy, vitamin A supplements may cause toxicity. Animal products can be harmful in some cases, as well.
On the other hand, eating plants high in beta-carotene can’t cause vitamin A toxicity.
What is lutein and zeaxanthin?
Lutein and zeaxanthin are important carotenoids. They are present only in plants. Fruits and vegetables are the best sources.
Moreover, lutein and zeaxanthin are powerful antioxidants which protect our eyesight. Studies have shown that they can reduce the risk of chronic eye diseases, such as age-related macular degeneration and cataracts.
What are essential fatty acids?
Healthy fats are important for the proper function of the body. The modern Western diet is high in fats, such as vegetable oils. For instance, olive oil, canola oil, and sunflower oil are the main sources of fat.
We shouldn’t consume too much fat, though. Especially, vegetable oils high in omega-6s can be bad for your health. Excess omega-6s may cause chronic inflammation. More here.
On the contrary, we should consume high amounts of omega-3 fatty acids, as they’re beneficial for good vision, as they’re essential for proper visual development and retinal function!
Recommended daily intake of
According to the American Academy of Ophthalmology, we can slow the progression of eye diseases, such as age-related macular degeneration, if we consume daily:
- vitamin C, 500 mg
- vitamin E, 400 IU
- lutein, 10 mg
- zeaxanthin, 2 mg
- zinc, 80 mg
- copper, 2 mg
There isn’t a daily beta-carotene recommendation, as it’s difficult to be established. Beta-carotene from supplements, beta-carotene from food, and vitamin A from animal products are all absorbed differently from the body.
Most noteworthy, we should take all these nutrients from food, not supplements. Hence, better prefer to drink a glass of fresh-squeezed orange juice than taking a vitamin C tablet.
Foods with beta-carotene
Above all, carrots, spinach, and beet greens are especially rich in beta-carotene. Analytically, the whole list of foods high in beta-carotene:
(mg per 100g)
(mg per 100g)
|turnip greens||7||coriander leaf, dried||3.4|
|dandelion greens||5.9||thyme, dried||2.3|
|red sweet pepper||1.6|
|onion young leaves||0.6|
Foods rich in lutein and zeaxanthin
Moreover, eating foods high in lutein and zeaxanthin is also good for your eyesight.
|Vegetables||Lutein & zeaxanthin |
(mcg per 100g)
|Spices||Lutein & zeaxanthin|
(mcg per 100g)
|dandelion greens||13610||parsley dried||2428|
|turnip greens||12825||coriander leaf, dried||2428|
|onion young leaves||1137|
Moringa powder is the best source of beta-carotene, lutein and zeaxanthin.
Additionally, many fruits, vegetables, and whole cereal are high in lutein and zeaxanthin. For instance, whole wheat pasta has 130 mcg per serving!