Lutein, zeaxanthin and vitamin A dominate this area, and some of it rests on large, long-running trials — unusually solid ground for nutrition.
Macular pigment, age-related eye conditions and visual function.
14 foods, grouped by the strongest rating any of its claims in this area reaches. Ratings describe the research, not the food. How ratings are decided.
Several human studies point the same way, with real caveats.
Spinacia oleracea
A fast-growing leafy annual in the amaranth family, eaten raw as young leaves or cooked as mature ones. It wilts to a fraction of…
Macular health: Research suggests diets higher in lutein and zeaxanthin from leafy greens are associated with denser macular pigment and lower rates of age-related macular degeneration. Most of the direct trial evidence used supplements rather than spinach, which limits how far it can be read across.
Ipomoea batatas
A starchy storage root in the morning glory family, unrelated to the potato. Flesh colour ranges from white through orange to…
Visual function: Research suggests orange-fleshed sweet potato meaningfully improves vitamin A status in populations where deficiency is common, and several field trials in sub-Saharan Africa point the same way. This says nothing about people whose vitamin A status is already adequate.
Early human work, or mostly lab and animal research.
Cucurbita moschata
A winter squash with dense orange flesh and a hard tan skin, stored for months after harvest. Its carotenoid content rises during…
Visual function: Butternut squash is a substantial source of provitamin A carotenoids, which matter for vision where vitamin A intake is inadequate. Trials of squash specifically, and evidence for people whose status is already adequate, are lacking.
Daucus carota subsp. sativus
The taproot of a cultivated umbellifer, orange in most modern varieties because of selective breeding for carotene. Purple,…
Macular health: Carrots contribute carotenoids relevant to eye tissue, though far less lutein and zeaxanthin than leafy greens. Trials of carrots and macular outcomes are essentially absent.
Persea americana
A large single-seeded berry with dense, oily flesh, unusual among fruits for being mostly fat rather than carbohydrate. It ripens…
Macular health: Avocado supplies lutein in a fat matrix that favours absorption, and a small number of trials report increases in macular pigment optical density. The trials are few and the clinical meaning of that measure over a short period is uncertain.
Persea americana
Oil pressed from the flesh rather than the seed of the avocado, dominated by monounsaturated fat and stable at high cooking…
Macular health: Has been studied as a fat source improving absorption of carotenoids from a salad eaten alongside it, an effect demonstrated with avocado and with other added fats. Direct evidence for the oil and eye outcomes is minimal.
Capsicum annuum
Non-pungent cultivars of Capsicum annuum, harvested green or left to ripen to red, yellow or orange. Ripening changes their…
Macular health: Orange peppers are one of the better food sources of zeaxanthin specifically, and higher intake of that carotenoid is associated with macular pigment density. Trials feeding peppers and measuring eye outcomes have not been done.
Gallus gallus domesticus
The fat-soluble half of the egg, carrying essentially all of its fat, cholesterol, fat-soluble vitamins, choline and carotenoid…
Macular health: Some trials report increases in macular pigment optical density when egg yolks are added to the diet. Studies are small and short, and whether that translates to eye outcomes over years has not been shown for eggs specifically.
Brassica oleracea var. sabellica
A loose-leaved cabbage that does not form a head, eaten raw in salads or cooked. Like other Brassica oleracea vegetables it…
Macular health: Kale is among the densest food sources of lutein and zeaxanthin, and higher intake of those carotenoids is associated with denser macular pigment. Trials feeding kale specifically and measuring eye outcomes are scarce.
Pistacia vera
The green seed of a small desert tree, usually sold roasted in a split shell. The USDA reference entry is for the raw kernel…
Macular health: Contains compounds associated with macular pigment, namely lutein and zeaxanthin. Evidence is limited to a small number of trials measuring macular pigment density rather than eye disease outcomes.
Crocus sativus
The dried stigmas of the Crocus sativus flower, harvested by hand and the most expensive spice by weight. The USDA entry is per…
Visual function: Small trials of saffron supplements in age-related macular degeneration report modest changes in retinal electrical function and visual acuity measures. The trials are few, small and short, and the same research groups produced most of them.
Not enough human research to say anything useful yet.
Capsicum annuum
Ground dried Capsicum annuum peppers, ranging from sweet to hot and sometimes smoked over oak. The USDA entry is per 100 g of the…
Macular health: Paprika supplies carotenoids including zeaxanthin, which is concentrated in the macula. No human study has tested paprika as a food for eye outcomes, and culinary portions are small compared with the intakes used in eye research.
Petroselinum crispum
A biennial Apiaceae herb eaten fresh in quantity in dishes such as tabbouleh and used as a garnish elsewhere. It is unusually…
Macular health: Parsley supplies lutein, which concentrates in the macula. No human study has tested parsley itself for eye outcomes, and garnish-sized portions are small relative to intakes studied in eye research.
Beta vulgaris subsp. vulgaris
A leafy form of the same species as beetroot, grown for its leaves and thick stalks rather than its root. The coloured stems owe…
Macular health: Chard contributes lutein and zeaxanthin, and higher intake of these carotenoids from greens is associated with macular pigment density. Evidence specific to chard has not been generated.