Dr. Grossman’s Blog

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Healthy fats are essential to eye health, and are especially important to the prevention and treatment of macular degeneration.

A study published in the Journal of Lipids Research looked into the roles played by both long chain and very long chain polyunsaturated fatty acids (LC-PUFAs and VLC-PUFAs), both of which are naturally present in the eyes.  There are not a lot of VLC-PUFAs in the eyes, and they have not received a lot of scientific attention, but this study focused on the important role they play in eye health.

Researchers concluded that a lack of either LC-PUFAs and VLC-PUFAs can lead to macular degeneration.  Source: http://www.lef.org/news/LefDailyNews.htm?NewsID=10473&Section=Aging

Fish oil is the key source of these compounds.

Learn more about how to prevent macular degeneration naturally.

Researchers with the Hordaland Health Study reviewed the relationship between consumption of different amounts of fish (and fish products) and cognitive performance.

In this study, 2031 subjects in Norway aged 70 to 74 underwent a battery of six cognitive tests and completed food-frequency questionnaires that identified both the quantity and the type of fish consumed in their diet. Researchers then studied the associations between cognitive performance and the main types of consumed seafood, i.e., fatty fish, lean fish, processed fish, fish sandwich, and fish or cod liver oil.

They found that fish eaters had significantly better results on all cognitive tests than did the non-consumers, even after adjustment for several non-nutritional factors with a proven association with cognition (e.g., education levels).

The protective effect of eating fish and fish products extended to almost all of the tested cognitive abilities. In addition, the associations between fish and fish product intake and cognition were dose-dependent: those who ate greater amounts of fish showed better test results.

The researchers also observed that the results depend on the type of fish consumed: the effect was more pronounced for non-processed lean fish and fatty fish.

Read other studies that link fish consumption to improved eye health

Learn more about natural fish oil products

SOURCE: “Cognitive performance among the elderly and dietary fish intake: the Hordaland Health Study”, Nurk, et. al., Am J Clin Nutr; 86:1470-1478 (November 2007).

Another great reason to eat fish: a French study has shown that eating fatty fish more than once a month is associated with a 60% reduction in risk for age-related macular degeneration (AMD).

AMD is a medical condition associated with aging in which people gradually lose their sharp central vision. Central vision is needed for reading, recognizing faces, and seeing objects clearly.

A key finding in this study was the positive effect of fatty fish consumption (white fish intake was not significantly associated with AMD). Fatty fish included in this study were both fatty “blue” fish (fresh tuna, canned tuna without oil, mackerel, sardine, salmon) and fatty fish canned in oil (tuna, sardine, anchovy).

This population-based study from southern France reviewed nutritional data from a dietician-administered food-frequency questionnaire to assess the associations of dietary fat with the risk of AMD. AMD was classified from retinal photographs using the international classification and included neovascular age-related macular degeneration, geographic atrophy, soft indistinct drusen, and soft distinct drusen associated with pigmentary abnormalities.

Results of dietary fat analysis showed that high total, saturated, and monounsaturated fat intake were linked to increased risk for AMD, while total polyunsaturated fatty acid was not significantly associated with AMD. Review of fish intake showed that total and white fish intake was not significantly associated with AMD, but intake of fatty fish more than once a month was associated with a 60% reduction in AMD.

Read more about AMD

Learn about other food sources for nutrients important to help fight macular degeneration, including Omega-3 Fish Oil

Source: Dietary fat and the risk of age-related maculopathy: the POLANUT Study.

Eur J Clin Nutr. 2007 Feb 14; Inserm, Research Unit U593 for Epidemiology, Public Health and Development, Bordeaux, France, Universite Victor Segalen Bordeaux 2, Bordeaux, France.

Cataracts can not only be prevented, but can even be reversed through nutrition, supplementation and lifestyle changes. Read what folks who’ve tried these methods say about products that help cataracts.

Cataracts – once considered an inevitability for the elderly and sometimes not-so-elderly, redeemable only by surgery. There’s been quite a bit of interesting new research in the last several years pointing to the alternatives and effects of different modes of living that have an impact.

1. 2008 – An observational 10-year study of more than 35,000 middle-aged U.S. women observed the women’s use of dietary supplements and occurrence of cataracts – further verifying that lutein, zeaxanthin and vitamin E were significantly helpful. more …

2. 2006 – Two studies show significant reductions in cataracts for those in the highest percentage of vitamin C & bioflavanoids intake. more …

3. 2007 – Dietary linolenic acid (think flaxseed oil, fish oil) intake is positively associated with five-year change in eye lens nuclear density (think cataracts!). more …

Causes?

• Free radicals are responsible for most cataracts. They are natural byproducts of metabolism. These highly reactive chemicals cause oxidation, which in turn causes aging. As the lens of the eye ages, it hardens and loses its ability to focus. This process is similar to hardening of the arteries, and is often associated with changes in the joints.
• Chronic physical stress such as dental problems, physical injury to the vertebrae or neck, or any stress that reduces eye movement and increases muscle tension.
• Food Allergies or sensitivities, particularly involving dairy products, wheat and/or soy can congest the sinuses, impairing lymphatic and veinous drainage, resulting in decreased nutrition to the eyes.
• Toxins, pharmaceutical drug side effects, such as steroid drugs, or photosensitizing drugs such as gout medications, cholesterol lowering drugs, antibiotics and diuretics.
• Smoking – the risk in ex-smokers is 50 percent higher compared to non smokers. Each cigarette also robs the body of 25 mg of vitamin C. Smokers have an increase in lipids (both fat and cholesterol) which increase the risk of severe cardiovascular disease. These factors produce narrowing of the retina blood vessels that carry valuable nutrients to the eye.
• Diabetes and other diseases that affect multiple areas of the body such as hypertension, arthritis, heart disease, and diabetes. Diabetics develop cataracts at an earlier age than non- diabetics. An accumulation of sorbitol and fructose in the lens can induce osmotic swelling of the lens, which will lead to the development of a cataract.
• Poor nutrition and digestion. Nutritional deficiencies, such as in poor areas of Third World countries, can cause cataracts to develop early and progress faster. In every part of the world, people with poor digestion and chronic bowel problems have a fourfold higher incidence of cataracts.
• Heredity
• Aging of the Eyes – hardening of the lens occurs as we age.
• Sunlight – invisible ultraviolet light (UV light) which is one of the light frequencies of sunlight promotes free-radical damage to the lens. The effects of UV light are cumulative over time.
• Alcoholic Consumption - High intake of alcohol more than doubles the risk of developing cataracts. More than 7 drinks per week will increase the risk, while moderate use does not seem to increase the risk.
• Too much Vitamin B2 aggrevates – Those with Cataracts should not use supplemental Vitamin B2. Vitamin B2 is a photosensitizing substance – experimental studies have shown that when Vitamin B2 is exposed to Visible Light, Cataracts can occur (or be exacerbated) as a result of the generation of Free Radicals from the interaction of Visible Light, Oxygen and Vitamin B2. This indicates that in persons afflicted with Cataracts, excessive Vitamin B2 is more harmful than beneficial.

See our comprehesive discussion of cataracts solutions.

Solutions
These are the four most important supplements for cataracts.