Dietary Choices Substantially Impact geographic Atrophy Progression,Experts Warn
A growing body of evidence suggests that dietary choices play a critical role in the progression of geographic atrophy (GA),an advanced form of age-related macular degeneration (AMD) and a leading cause of vision loss for those over 40. What we eat can either accelerate or mitigate the damage caused by this debilitating condition.
“Foods that may cause more oxidative stress or stress on the immune system may also be worse for your eyes,” explains a leading retina specialist at Massachusetts Eye and Ear and Harvard Medical School in Boston.Oxidative stress occurs when there’s an imbalance between harmful molecules called free radicals – generated by pollution and metabolism – and the antioxidants that neutralize them. Foods high in saturated and trans fats, as well as refined carbohydrates, are notably concerning.
Three Food Groups to Limit for Optimal Eye Health
Individuals diagnosed with geographic atrophy should be particularly mindful of their intake of refined carbohydrates, red and processed meats, and foods containing trans fats.
1. Refined Carbohydrates: A Spike in Blood Glucose
Refined carbohydrates, such as white bread, pasta, and sugary drinks, cause rapid spikes in blood glucose. These spikes trigger inflammation and oxidative stress throughout the body, including the retina.
“When blood sugar is consistently high, it creates a cascade of inflammatory processes that can damage the delicate tissues of the eye,” the retina specialist explains. A study published in the American Journal of Clinical Nutrition found a correlation between high glycemic index diets and an increased risk of AMD.
2. Red and Processed Meats: Fueling Inflammation
processed meats – including burgers and deli meats – are often high in saturated fat, nitrates, and other compounds that promote inflammation and oxidative stress, two major contributors to geographic atrophy progression.
“Over time, that combination weakens the retina’s defenses and encourages GA to move forward,” says a registered dietitian nutritionist and founder of Nutrition by Bess. While current research doesn’t definitively link high meat consumption to late AMD or geographic atrophy specifically,a systematic review of 26 studies revealed that individuals who consumed the highest amounts of meat had an increased risk of early age-related macular degeneration. Conversely, those who ate fish reduced their risk of both early and late AMD by 18 percent.
For those looking to incorporate more fish into their diet, exploring easy recipes or utilizing convenient options like canned tuna can be a good starting point.When selecting fish, prioritizing sustainable choices by consulting resources like Seafood Watch is crucial.
3. Trans Fats: A “Perfect Storm” for GA
French fries, onion rings, and chicken nuggets, while tempting, often contain trans fats – created when liquid oils are solidified.
“Trans fats create a perfect storm for GA progression,” the registered dietitian nutritionist explains. “They drive oxidative stress and inflammation while also harming blood vessel health.”
An observational study involving individuals with AMD found that higher trans fat intake was associated with more than double the likelihood of having AMD, though it did not specifically focus on geographic atrophy.While U.S. food manufacturers are prohibited from selling foods with partially hydrogenated oils, they can still legally sell products containing up to half a gram of trans fat per serving, meaning consumption can quickly add up. Given the known negative effects of trans fats on heart health, avoiding them altogether is prudent.
Foods that may still contain trans fats include:
- Stick margarine
- Vegetable shortening
- Frozen dinners
- Processed snacks
- Baked goods
The Path to Better Eye Health Through Diet
The foods we consume have a demonstrable effect on eye health and can influence the progression of geographic atrophy.Limiting intake of refined carbohydrates, trans fats, and red meat is linked to a lower risk of age-related eye damage.
To maintain optimal eye health as you age, prioritize brightly colored fruits, dark leafy vegetables like kale, broccoli, and spinach, and omega-3-packed nuts and fish. Crucially,it’s also essential to follow any treatment recommendations provided by your healthcare provider.
