High saturated fat intake - Macular Degeneration
High-fat diets might be a marker for diets that are poor in many micronutrients that could protect against age-related macular degeneration. Age-related macular degeneration (AMD) is the leading cause of vision loss in Americans over 60 years of age. This disease involves cell death in the macula of the eye, which has a high density of cone cells and is responsible for central vision. A recent study published in the Archives of Ophthalmology investigated the relationship between fat intake and the presence of intermediate AMD 4-7 years later in over 1700 women, and found that some fats may benefit eye health while others may be damaging. Saturated fats are detrimental when it comes to heart disease and cancer, so these results are no surprise - saturated fats showed the greatest association with AMD – 60% increased odds of AMD in women who consumed the greatest amounts. Conclusions: High intake of saturated fat is associated with increased risk for early age-related maculopathy. Deana Ferreri, Ph.D. |
So what else were these folks eating? It couldn't have all been saturated fat. Maybe it was the most saturated fat in those who ate the most carbohydrate? I'd like to see the percentages of macronutrients these people ate. Also, I need to know what type of fat these people ate as well. Did they lump saturated with trans-fat?
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eggs are the best thing for your eyes!!!
As we LCers know, eggs are a great food, for many many reasons. One of the best reasons to eat eggs is to protect your eyes. The lutein in eggs is much better absorbed by the body than the lutein in spinach. But, seeing as spinach is also quite good for you, why not make your next eye-saving meal a spinach quiche?
I found these articles recently for my Dad and just put them all in one big word document. I hope the references come out OK. Quote:
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I'll see that study and raise you...
Study: High-Carb Diet Leads To Advanced Age-Related Macular Degeneration, Possible Blindness Fast-Acting Carbs May Hasten Vision Loss Over Time |
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don't you mean you'll "see" that study and raise him? sorry couldn't resist... |
OOOH! I knew it didn't sound quite right. I'll fix it. I obviously need to play a little poker!
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Nancy, I agree with everything in your above links. Science has know for a long time that quickly digested and absorbed carbohydrates result in rapidly rising blood sugar levels that result in higher risks for developing macular degeneration. Science has also known for a long time that eating red meat increases an individual’s chances of contracting Age Related Macular Degeneration by 50%. It’s also known that eating chicken would decrease that same likelihood by 50%. They suspect that the saturated fats in red meats decrease the blood flow to the macula resulting in AMD. Personally, I no longer consume red meat, however, it does introduce protein into our systems and can have positive effects on us if consumed in moderation. I only question why protein sources such as eggs, fish and chicken, which are healthier and have been shown to prevent certain ocular conditions, are not chosen over red meat? Dump the simple carbs and the red meat!!! Bo |
You better stay away from that vegetable fat!
http://archopht.ama-assn.org/cgi/co...ourcetype=HWCIT Quote:
Vegetable fat almost doubles the risk of saturated fat. From the objectives of this study, it seems the researchers went in with a pre-determined agenda. Quote:
And the results are based on food-frequency surveys. Gold standard of nutritional research??? Sorry, I'm not changing how I eat based on this study. ETA: That wasn't the "recent" study on the link. This is & I can only access the abstract. http://archopht.ama-assn.org/cgi/co...ourcetype=HWCIT Quote:
Food frequency studies and notice diet was evaluated in 1994-98 but eyes were examined 7 years later! Quote:
Omega 3's really?? What does "lower prevalance" mean here? approximately 1.9 fold??? In younger women, the risk of AMD goes up with increased fat, but it goes down in older women? Why? Since there's no data available to me, I'm not worried about this study based on the abstract. |
Boboguy, You titled your post
"High saturated fat intake - Macular Degeneration" Quote:
However, among other things, this is what the linked paper actually says, "Findings are generally consistent with the results of our previous case-control study in which we compared the dietary habits of individuals with advanced, exudative disease with control subjects.15 In that study, specific types of fat, including vegetable, monounsaturated, and polyunsaturated, were associated with a higher risk for AMD diagnosis." Let's have a little quiz, Which type of fat was NOT mentioned in the second quote above? I'll give you a clue. It was the only fat you named in the title of your post. Another quote from the Paper: "Additionally, obesity, independent of fat intake, remained significantly related to the progression of AMD (data not shown). Furthermore, increased fat intake and obesity are known to be associated with inflammation, and inflammatory factors are known to be associated with cardiovascular disease and may possibly be associated with AMD.10 Other mechanisms, such as genetic and dietary interactions, might also play a role." A "may" be associated with B, and B "may possibly" be associated with C. Other mechanisms might also be associated with C. This implies A is the cause of C. (as stated in Deana Ferreri's conclusion above) Pretty convincing logic?, NOT. Also "..although the trend for increasing risk with higher animal fat intake was not significant (P= .09). Higher vegetable fat intake had a stronger relationship with increased risk of AMD progression with an RR of 3.82 (95% confidence interval, 1.58-9.28) for the highest quartile compared with the lowest quartile (P trend = .003)." Deana Ferreri posts on Joel Fuhrman's blog in support of PCRM and CSPI dogma. Wonder why she left out the info on Omega 6 fats and their significant association with AMD? What I'd also like to know is why you only mention Saturated fat in the title of your post? Until you give a satisfactory answer to that I will not waste any more time chasing up any future red herrings you throw in here. |
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Over a period of twelve years, medical researchers at Tufts University followed nearly 90,000 people 50 years of age or older. They kept track of their detailed fat intake as well as measuring their macular degeneration and published their results in 2001. In general, they found that people who got 42% or more of their calories from fat were more likely to develop macular degeneration. The study also found that unprocessed meat, like steak, lamb, or pork, need only be eaten once a week before the subjects' risk of macular degeneration increased by 35%. Some researchers caution that the associations found at times can not be pinpointed to the saturated fat itself but may be related to other compounds in the foods in which they are commonly found. High-fat diets might simply be a marker for diets that are poor in many micronutrients that could protect against age-related macular degeneration. I’m aware that there is no definitive answer as to what specifically causes MD. There is however an emerging theory that healthy macula functioning depends on a high blood flow through its blood vessels and that anything that interferes with this blood flow can cause the macula to malfunction. Many believe that high saturated-fat diets can cause plaque buildup along blood vessel walls, including the macular vessels, which impedes blood flow. Amergin, I'm here seeking advice and opinions and have no desire to throw red herrings or stroke controversy. I did mention saturated fat in the title after reading about a study of older (age 45-84) Americans indicating signs of early MD were 80% more common in the group who ate the most saturated fat compared to those who ate the least. Amanda, thank you for the great articles. I have scrambled eggs with spinach almost every morning. Btw, I have MD in my right eye and am trying everything I can do to halt its progression. Bo |
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It's not science that knows this, it's statistics. In other words, it's not scientists, it's accountants. There is no truth to be had from accounting. On the other hand, what science knows about red meat, it found by testing it on humans. Do I really need to post it again? www.jbc.org/content/87/3/651.full.pdf Quote:
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How about this here there them that there huh?
http://forum.lowcarber.org/showthread.php?t=404148 So, I live to be a hundred but I go blind at 60?!? |
eye health
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I remember you mentioning that about you having MD. Sorry to hear it. I'll edit this post and put in a link to a website that sells a whole bunch of supplements to help with eye health. I'm not a huge fan of the guy who promotes this stuff, although he basically recommends a paleo diet, but it might be of interest to you to look into some of the things he recommends. Here's the link: http://www.eyesight.nu/ amanda |
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Then it would be that much more important for you to cut through the bullshit and go right at the truth, don't you think? I used to have 15/20 vision before I cut out all sugar and adopted an all meat diet. Now after a couple of years, my vision is better than 20/20. I don't know why that is, but I'm certain it's not due to any sort of degeneration. |
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Then take a high dose vitamin A supplement. All those antioxidants that we hear about protecting the eyes (lutein, zeaxanthin, lycopene, B-carotene etc) are just vitamin A analogues anyway. Why not go for the source? |
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