The strongest evidence for eye vitamins is narrow. In people who already have intermediate age-related macular degeneration (AMD), or late AMD in one eye, AREDS-type supplements probably slow progression to late AMD, according to a 2023 Cochrane review rated moderate certainty. Supplements have not been shown to prevent AMD in people who do not have it, and they had no overall effect on cataracts. For everyone, the National Eye Institute (NEI) lists not smoking, staying active, and eating leafy greens and fish among choices that may lower AMD risk.
Many products are labeled for eye health, but the research behind them is more specific than the packaging suggests. This guide pulls together what large trials, independent reviews and government health agencies have found, and links to our deeper articles on each topic.
Why researchers study nutrition and the eye
AMD is common. A study in JAMA Ophthalmology estimated that in 2019, about 18.34 million US adults age 40 and older had early AMD and about 1.49 million had late AMD. NEI lists older age, family history, being Caucasian, and smoking as risk factors, and notes that early AMD has no symptoms. Our guides to AMD symptoms and dry vs. wet AMD explain the condition itself.
Nutrition is a natural question to ask. The NIH Office of Dietary Supplements (ODS) says lutein and zeaxanthin "accumulate in the retina, the tissue in the eye that is damaged by AMD." Observational studies have also linked higher zinc intake with lower AMD risk. Links like these cannot prove cause and effect, which is what clinical trials are for.
The evidence, claim by claim
The trials behind "AREDS2"
The first Age-Related Eye Disease Study (AREDS) followed 3,640 people aged 55 to 80 for an average of 6.3 years. Compared with placebo, a combination of antioxidants, zinc and copper lowered the odds of progressing to advanced AMD, with an odds ratio of 0.72. An odds ratio compares how likely an outcome is in two groups: 1 means no difference, and below 1 means the outcome was less common in the supplement group. NEI describes this as about a 25 percent lower risk of moving from intermediate to advanced AMD.
AREDS2 enrolled 4,203 people aged 50 to 85 and followed them for a median of 5 years. Adding lutein and zeaxanthin did not further lower risk in the main analysis (hazard ratio 0.90). A hazard ratio is similar, but it compares how quickly an outcome happens over time. AREDS2 found more lung cancers in former smokers taking the original formula's carotenoid, which is one reason it was replaced with lutein and zeaxanthin. After 10 years, lutein and zeaxanthin were linked to a lower risk of late AMD than no lutein and zeaxanthin (hazard ratio 0.91).
For design details and a plain-English guide to the statistics, see AREDS and AREDS2 explained. For who the formula is meant for, read What Is AREDS2 and Who Needs It?
Who the evidence applies to
In its AREDS FAQ, NEI says the formulas benefited people with intermediate or late AMD, and there was no benefit for people with early AMD or without AMD. NEI's patient page adds that with late AMD in one eye, the formula may slow AMD in the other eye, but with late AMD in both eyes it probably won't help.
How much difference it makes depends on starting risk. The 2023 Cochrane review of 26 trials and 11,952 people estimated about 78 fewer cases of late AMD per 1,000 people with intermediate AMD, but only about 4 fewer per 1,000 with early AMD. More on this in Can AREDS2 Prevent Macular Degeneration?
What supplements have not been shown to do
- Prevent AMD. NEI states that "nutritional supplements cannot prevent AMD." A 2017 Cochrane review of prevention trials in 76,756 people found that vitamin E does not prevent AMD (risk ratio 0.97, high certainty) and vitamin C probably does not (risk ratio 0.96). A risk ratio of 1 means no difference. There was no trial evidence on lutein and zeaxanthin for prevention.
- Add benefit with omega-3s. Fish oil added to the formula gave no extra benefit in AREDS2 (hazard ratio 0.97).
- Prevent cataracts. Neither AREDS nor AREDS2 found an overall effect on cataract surgery. ODS also reports that high-dose vitamin C supplements (about 1,000 mg a day) were linked to a 25% higher risk of cataract extraction in a cohort of Swedish women.
- Gain more from added extras. The American Academy of Ophthalmology (AAO) says there is no clear evidence that adding other vitamins or micronutrients provides extra benefit for AMD.
Our article on vitamin C and vitamin E covers the prevention trials in more depth.
The nutrients, one by one
| Nutrient | AREDS2 daily dose | RDA, adults 51+ | Upper limit, adults | Worth knowing |
|---|---|---|---|---|
| Vitamin C | 500 mg | 75 mg women, 90 mg men | 2,000 mg | Smokers need 35 mg more a day (ODS) |
| Vitamin E | 400 IU (180 mg synthetic form) | 15 mg | 1,000 mg | Large doses may raise bleeding risk with blood thinners (ODS) |
| Zinc | 80 mg | 8 mg women, 11 mg men | 40 mg | 50 mg or more for weeks can lower copper absorption (ODS) |
| Copper | 2 mg | 900 mcg | 10,000 mcg | Added to prevent zinc-related copper deficiency anemia (NEI) |
| Lutein and zeaxanthin | 10 mg and 2 mg | None set | None set | Collect in the retina (ODS) |
The RDA is the daily amount that meets the needs of most healthy adults. The AREDS2 doses are far higher, and the zinc dose is twice the adult upper limit. Read more in 5 vitamins and nutrients that matter for your eyes, zinc and copper for eye health, and lutein and zeaxanthin.
Safety in brief
AREDS found no statistically significant serious side effect, and the 2023 Cochrane review lists stomach and gut symptoms as the main side effect. Specific cautions still apply. ODS advises taking quinolone or tetracycline antibiotics at least 2 hours before or 4 to 6 hours after zinc, and notes that large doses of vitamin E can raise bleeding risk in people on blood thinners such as warfarin. See Are AREDS2 vitamins safe?
Keep in mind: If you smoke or used to smoke, take blood thinners, antibiotics or other medicines, or have kidney or liver disease, talk with your eye doctor before starting a high-dose formula.
Food and eating patterns
NEI says the AREDS2 doses are hard to reach through diet alone. Lutein is the exception: one cup of boiled spinach has about 20,300 mcg (about 20 mg) of lutein plus zeaxanthin, according to USDA FoodData Central.
Eating patterns matter too. In an analysis of 7,756 AREDS and AREDS2 participants followed for a median of 10.2 years, people whose diets most closely matched a Mediterranean pattern had a lower risk of late AMD than those whose diets matched it least (hazard ratio 0.78). Fish intake contributed. This is observational, so it shows a link, not proof. Details are in Can you get AREDS2 nutrients from food?
Reading a supplement label
Products that mention AREDS2 do not all contain the trial amounts. Some use 25 mg of zinc, some list 4 mg of copper, and many split the daily amount across 2 softgels. PreserVision AREDS3 is a brand name, not an NEI trial. Our label-by-label comparison walks through six products. If you are comparing formulas, our science page lists the doses used in the trials.
Eye exams come first
Because early AMD has no symptoms, an eye exam is how you find out whether you have it and what stage it is. AAO advises that people 65 or older have their eyes checked every year or two. Our guide to eye health after 50 covers other age-related conditions and when to get checked.
Related reading
- AREDS and AREDS2 Explained
- 5 Vitamins and Nutrients That Matter for Your Eyes
- Zinc and Copper for Eye Health
- Vitamin C and Vitamin E for Eye Health
- AREDS2 Supplements Compared by Label
- Eye Health After 50
- Can AREDS2 Prevent Macular Degeneration?
- Are AREDS2 Vitamins Safe?
- Can You Get AREDS2 Nutrients From Food?
- What Is AREDS2 and Who Needs It?
- Dry vs. Wet Macular Degeneration
- The Symptoms of Macular Degeneration
- Lutein and Zeaxanthin: The Yellow Pigment That Shields Your Macula
More in the library
- How Long Does AREDS2 Take to Work?
- Omega-3s, Fish Oil and Your Eyes
- Leafy Greens Ranked by Lutein and Zeaxanthin
- Smoking and Eye Health
- Can You Take AREDS2 With a Multivitamin?
- AREDS2 and Blood Thinners
- What "AREDS3" on a Label Means
- How to Use an Amsler Grid
- Cataracts vs Macular Degeneration
- Glaucoma After 60
References
- Evans JR, Lawrenson JG. Antioxidant vitamin and mineral supplements for slowing the progression of age-related macular degeneration. Cochrane Database Syst Rev. 2023;9:CD000254. doi:10.1002/14651858.CD000254.pub5
- Evans JR, Lawrenson JG. Antioxidant vitamin and mineral supplements for preventing age-related macular degeneration. Cochrane Database Syst Rev. 2017;7:CD000253. doi:10.1002/14651858.CD000253.pub4
- Age-Related Eye Disease Study Research Group. AREDS Report No. 8. Arch Ophthalmol. 2001;119:1417. doi:10.1001/archopht.119.10.1417
- AREDS2 Research Group. JAMA. 2013;309:2005. doi:10.1001/jama.2013.4997
- Chew EY, et al. AREDS2 Report No. 28. JAMA Ophthalmol. 2022;140:692. doi:10.1001/jamaophthalmol.2022.1640
- Rein DB, et al. JAMA Ophthalmol. 2022;140:1202. doi:10.1001/jamaophthalmol.2022.4401
- Keenan TD, et al. Ophthalmology. 2020;127:1515. doi:10.1016/j.ophtha.2020.04.030
- National Eye Institute. AREDS/AREDS2 Frequently Asked Questions; Age-Related Macular Degeneration. nei.nih.gov
- NIH Office of Dietary Supplements. Fact sheets for vitamin C, vitamin E, zinc, copper, and vitamin A and carotenoids. ods.od.nih.gov
- American Academy of Ophthalmology. Vitamins for AMD (Aug 2026); Eye Exams 101. aao.org
- USDA FoodData Central. Spinach, cooked, boiled, drained, without salt (FDC 168463). fdc.nal.usda.gov
This article is for general education and is not medical advice. Talk with your eye doctor before starting any supplement, especially if you smoke, take other medicines, or have a health condition. These statements have not been evaluated by the Food and Drug Administration. TruVista products are not intended to diagnose, treat, cure, or prevent any disease.
