Eye Supplementation: What Is It? And Why More Specialists Are Recommending It

Key Points:

• The Age-Related Eye Disease Studies (AREDS and AREDS2) developed a high-dose nutrient formula that slows progression of age-related macular degeneration (AMD) by about 25%, but the formula must be tailored based on smoking history due to cancer risks.
• Beta-carotene, originally included in the formula, was removed after studies linked it to increased lung cancer risk in smokers and former smokers; it was replaced by lutein and zeaxanthin, which concentrate in the retina and are safer.
• The current AREDS2 formula includes lutein, zeaxanthin, vitamins C and E, zinc, and copper, and is proven effective only for patients with intermediate or advanced AMD, not for early AMD or those without the disease.
• Supplementation should be personalized and supervised by an ophthalmologist, as the formula is not a general eye vitamin and high doses of certain nutrients can interact with medications or cause side effects.
• Genetic testing cannot reliably predict AMD risk or supplement effectiveness, so regular eye exams remain essential for monitoring disease progression regardless of genetic profile.