AREDS2 supplements are one of the few eye supplements with strong clinical evidence behind them, but they’re designed for a specific group of people: those with intermediate age-related macular degeneration (AMD) or those who’ve already lost vision in one eye from advanced AMD. If you fall into one of those categories, the formula can meaningfully slow your risk of progressing to vision-threatening disease. If your eyes are healthy, the evidence doesn’t support taking it as a preventive measure.
Who Benefits From AREDS2
The AREDS2 formula is most likely to help people who have a significant number of drusen, which are yellow deposits under the retina that your eye doctor can spot during a dilated exam. The American Academy of Ophthalmology recommends the supplements for people with early to intermediate AMD who are at risk of developing the advanced form of the disease. They may also lower the risk of developing wet AMD and vision loss in a second eye for people who’ve already lost vision in one eye.
The original AREDS trial, run by the National Eye Institute, found that a specific combination of vitamins and minerals reduced the risk of progressing to advanced AMD by about 25%. The AREDS2 study then refined the formula, swapping out one ingredient and confirming that the updated version was both safer and at least as effective.
If you have no signs of AMD, there’s no clinical evidence that taking these supplements will prevent the disease from developing in the first place. They slow progression in people who already have it.
What’s in the Formula
The AREDS2 daily formula contains six ingredients at specific doses:
- Vitamin C: 500 mg
- Vitamin E: 400 IU (180 mg)
- Zinc: 80 mg
- Copper: 2 mg
- Lutein: 10 mg
- Zeaxanthin: 2 mg
The copper is included specifically to prevent copper deficiency anemia, a known risk of taking high-dose zinc over time. Most commercial AREDS2 products split this daily dose across two softgels.
Why It Replaced the Original Formula
The original AREDS formula contained 15 mg of beta-carotene instead of lutein and zeaxanthin. During and after the original trial, separate clinical trials found that beta-carotene increased lung cancer risk in smokers. The AREDS2 study confirmed this directly: participants who were former smokers and took beta-carotene experienced roughly double the risk of lung cancer compared to those who didn’t.
Lutein and zeaxanthin showed no such risk. A 10-year follow-up published in JAMA Ophthalmology found that beta-carotene maintained its near-doubling of lung cancer risk over the long term, while lutein and zeaxanthin carried no statistically significant increase. This is why the AREDS2 formula is now the standard recommendation for everyone, not just smokers. If you see an eye supplement that still contains beta-carotene, it’s using the outdated formula.
What It Won’t Do
AREDS2 was designed and tested for AMD. It has not been shown to prevent or treat cataracts, glaucoma, or diabetic retinopathy. Some preliminary research has explored whether lutein and zeaxanthin might benefit people with diabetic retinopathy, since higher blood levels of these nutrients are associated with lower odds of the condition. But this hasn’t translated into clinical recommendations, and the AREDS2 formula hasn’t been tested for that purpose.
The supplements also won’t reverse AMD or restore vision you’ve already lost. Their role is to slow the transition from intermediate disease to the advanced stages that cause significant vision loss.
Side Effects to Know About
The most notable concern is the high dose of zinc. At 80 mg per day, it’s well above the recommended daily allowance of 8 to 11 mg. Over time, high zinc intake can interfere with copper absorption, which is why the formula includes copper as a safeguard. Some people experience stomach upset or nausea from the zinc. If that’s an issue, taking the softgels with food typically helps.
The high doses of vitamins C and E are also well above standard dietary recommendations, though both were generally well tolerated in the clinical trials. If you’re taking other supplements or multivitamins, check for overlap so you’re not doubling up on these nutrients.
Food Sources of the Same Nutrients
Lutein and zeaxanthin are found naturally in dark leafy greens like kale, spinach, and collard greens, as well as in egg yolks and corn. Higher dietary intake of these nutrients is associated with better outcomes in several health measures. In the AREDS2 study population, participants with the lowest baseline dietary intake of lutein and zeaxanthin benefited the most from supplementation, suggesting that if your diet is already rich in these nutrients, the added benefit of a pill may be smaller.
That said, it’s difficult to match the specific doses in the AREDS2 formula through food alone, particularly for zinc and vitamin E. For people with intermediate AMD, the supplements provide a standardized, tested dose that dietary changes can complement but probably can’t fully replicate.
How to Know If You Should Take It
The decision depends entirely on whether you have AMD and how far it’s progressed. Your eye doctor can determine this during a comprehensive dilated eye exam. If you have large drusen or pigment changes in your retina consistent with intermediate AMD, AREDS2 is one of the few interventions with solid evidence of slowing things down. If your eyes are healthy or you have only very early changes, the supplements aren’t likely to provide a measurable benefit based on current evidence.
Many brands sell AREDS2 formula supplements over the counter. Look for products that match the exact doses from the clinical trial. Some eye vitamin products use the AREDS2 name loosely while containing lower amounts of key ingredients or adding unproven extras. The six ingredients at the doses listed above are what the research actually tested.