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The Protein Problem: How the Source Affects Cardiovascular Risks

By Dr. Joel Fuhrman, May 27

$0Thanks to popular wisdom, we tend to consider animal protein our dietary MVP – it’s associated with building muscle, and high-animal protein weight loss diets are still popular. In contrast, plant protein from vegetables, legumes, nuts and seeds is considered a “second string” source. But as usual, popular wisdom only gets part of the story right. When it comes to protecting your cardiovascular health, it is the source of your protein that matters most.$0$0 $0$0Many studies have demonstrated that plant protein is beneficial – and animal protein is harmful – regarding outcomes such as cardiovascular disease, cancer, and death from all causes. But new data, gathered by the Adventist Health Study 2, takes a more nuanced look at exactly which types of plant and animal proteins have the greatest impact on your risk of heart disease.$0$0 $0$0Researchers decided to ask which protein-containing foods in particular contribute to increasing or decreasing cardiovascular risk. It will come as no surprise to Nutritarians that nuts and seeds emerged as the most beneficial source of this vital nutrient.$0$0 $0$0All protein is not equal$0$0 $0$0In this new study, researchers focused on the specific sources of the subjects’ protein intake. A total of 81,337 participants were asked about their usual intake of these foods during the previous year, and then they were followed for 6-12 years. Data was analyzed to determine the percentage of total protein that came from these animal and plant sources.$0$0Of all the plant and animal protein sources analyzed, risk of cardiovascular deaths steadily climbed with higher consumption of meat protein, and steadily fell with greater consumption of protein from nuts and seeds.$0$0In the groups with the highest meat intake, risk was about 60 percent higher than in the group with the lowest intake. In the group with the highest intake of nuts and seeds, the cardiovascular risk was about 40 percent lower compared to the group with the lowest intake of nuts and seeds.$0$0 $0$0These results are consistent with previous research that has compared nuts to meat as a major calorie source.  Plus, there have now been numerous studies linking higher nut intake to longevity.$0$0 $0$0Why is meat so harmful to the cardiovascular system?$0$0 $0$0·       Meat is high in Advanced Glycation End Products (AGEs), which contribute to vascular damage, especially in people with diabetes.$0$0·       Meat is high in heme iron, which has pro-oxidant effects that promote cardiovascular disease.$0$0·       Meat contains pro-inflammatory components such as arachidonic acid, saturated fat, and carnitine$0$0·       Meat consumption (and animal protein consumption in general) is associated with weight gain$0$0·       Meat promotes the growth of unfavorable bacteria that lead to the production of TMAO, which inflames the endothelium and promotes atherosclerosis$0$0$0$0In addition to cardiovascular disease, diets high in animal protein also promote cancer. Animal protein, which has a higher biological value (compared to plant protein) because of its greater essential amino acid content, is absorbed and utilized quickly by the body. This raises IGF-1 to dangerous levels, which promotes the growth of tumors and enhances fat storage.$0$0 $0$0Why are nut and seeds so protective?$0$0 $0$0·       Nuts and seeds are the optimal protein choice for a cardio-protective diet.$0$0·       They are rich in a variety of heart-healthy nutrients: potassium, magnesium, fiber, plant sterols, tocopherols (vitamin E), flavonoids and other polyphenols.$0$0 $0$0·       They have been shown to reduce total and LDL cholesterol.$0$0 $0$0·       The fat-binding fibers are not absorbed, carrying fat into the stool and toilet.$0$0·       They are highly satiating, promoting a healthy weight.$0$0 $0$0·       Nuts are rich in arginine and glutamic acid, which aid in the production of nitric oxide and are important for maintaining a favorable blood pressure. $0$0 $0$0·       They promote favorable blood glucose levels in studies on patients with type 2 diabetes.$0$0 $0$0·       Nut consumption is associated with better vascular (blood vessel) function and reduced oxidative stress.$0$0 $0$0·        $0$0In addition to their cardiovascular benefits, nuts also facilitate the absorption of vegetable-derived phytochemicals, which increases the anti-oxidant potential and the protective function of immune system cells. Calories from nuts and seeds are absorbed very slowly, which means that the body is more likely to use them for energy rather than storage. IGF-1 levels that are too high or too low are detrimental to health, and the major determinant of IGF-1 levels is essential amino acid intake.  A diet rich in plant protein sources (such as seeds, nuts, and beans) provide adequate but not excessive amounts of all of the essential amino acids, enabling the body to modulate (lower) IGF-1 to the most protective levels, without getting too low.$0$0 $0$0As protein and fat sources, nuts and seeds are the clear winner over animal products. Nuts and seeds are crucial for cardiovascular health and longevity. Now that’s the kind of wisdom that deserves to be popular.$0$0Now that you know why your protein should come from the dirt rather than off the hoof, here are a few easy ways to improve the quality of your diet. And if you have any great tips that work for you, please share them in the comments section!$0$0·       Limit animal protein to no more than 2 ounces in a day.$0$0·       If you have animal protein, skip a day (at least) between servings.$0$0·       Use mushrooms, beans and even crumbled tofu to add a meaty texture to a dish.$0$0·       Eat nuts and seeds with leafy greens to aid in the absorption of fat-soluble nutrients from the greens.$0$0·       Eat some omega-3-rich chia seeds, ground flaxseeds, and/or walnuts every day.$0$0·       Add hemp seeds to a smoothie for a protein (and omega-3) boost.$0$0 $0$0This blog was originally posted on Dr. Joel Fuhrman’s website. Click here to read the original article.$0$0 $0$0Joel Fuhrman, M.D. is a board-certified family physician, nutritional researcher and six-time New York Times best-selling author. He serves as the President of the Nutritional Research Foundation. Dr. Fuhrman has authored numerous research articles published in medical journals and is on the faculty of Northern Arizona University, Health Science Division. His two most recent books are “Eat to Live Quick” and “Easy Cookbook and Fast Food Genocide.”$0$0 $0

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