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The #1 Best Diet to Protect Your Kidneys, New Study Says

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The food and beverages you put into your body could be impacting your kidneys’ ability to keep you safe and healthy. Drinking excessive amounts of soda and alcohol could do some real damage, while eating foods high in potassium and protein can help protect these vital organs. Now, new evidence suggests that following a Mediterranean diet—one with plenty of extra virgin olive oil—could help preserve kidney function, especially for those who have dealt with heart troubles in the past.

The study, published earlier this month in the journal Clinical Nutrition, aka the official journal of ESPEN (The European Society for Clinical Nutrition and Metabolism), examined a group of more than 1,000 coronary heart disease patients (specifically those who have suffered a coronary event six months ago or more). Researchers assigned half of these participants to stick to a Mediterranean diet rich in extra virgin olive oil and half to follow a low-fat diet rich in complex carbohydrates.

“Our main findings are that the long-term consumption of a Mediterranean diet—one [that is] rich in monounsaturated fat from olive oil—when compared to a low-fat diet, slows and preserves kidney function in those persons with coronary heart disease,” study co-author Elena Yubero Serrano, PhD, tells Eat This, Not That!.

In fact, the study actually found that both diets were linked with improved kidney function, though the positive effect was significantly more pronounced with the high-EVOO Mediterranean diet.

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Related: The 15 Best Mediterranean Diet Recipes

Maintaining kidney health is key for people with coronary heart disease because your kidneys don’t just remove waste and extra fluid. According to the National Institute of Diabetes and Digestive and Kidney Diseases, part of the U.S. Department of Health & Human Services’ National Institutes of Health, they also play a key role in your heart health—kidney damage can contribute to high blood pressure. So, it might be worth it to look out for your kidneys, if you’re worried about your heart.

“If you’re new to the Mediterranean diet and lifestyle, start small,” Julie Andrews, MS, RDN, CD, FAND, owner of The Healthy Epicurean, suggests. “Set goals like aiming to eat more fruits and vegetables and reduce processed meat consumption. Then, aim to eat more omega 3-rich seafood.”

“Then, swap your grains to 100% whole grains and shoot to eat more beans,” adds Andrews. “Setting small goals, one or two at a time, can help you implement and maintain a healthier lifestyle over time.”

On the flip side, for foods you should probably cut back on, check out these Popular Foods That May Cause Lasting Damage to Your Kidneys, Says Science.

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5 Eating Habits to Avoid to Live Like the World's Oldest People

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Did you know that your longevity is only about 25% attributable to genetics? As it turns out, your lifestyle choices, including your diet, can play a massive role in how long you live. Residents of the “Blue Zones”—which include Okinawa, Sardinia, Nicoya, Icaria, and Loma Linda—are well aware of this. Because of their healthy eating habits, they have a larger population of centenarians (people over 100) than anywhere else in the world.

“Following the Blue Zones’ eating habits is a centuries-old proven method to promote longevity, connection, and energy,” says Lexi Endicott, RD and culinary nutrition specialist at To Taste Culinary Nutrition. “You can start adopting these eating principles at 2 or 92; it’s never too early or too late to make food choices that promote your long-term health. Not only do the Blue Zones eating principles help you live a longer, healthier life, but they also naturally promote a longer, healthier life for our planet, too—a double win!”

Just as you can take a cue from Blue Zone residents on what to eat, you can also take a cue from them on what not to eat. Below, registered dietitians share a few eating habits you’ll want to skip if you want to live a longer life.

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It’s all too easy to go overboard on the snacks when you’re bored or distracted. For instance, if you’re watching Netflix or working at your desk and eating straight out of the bag or box, you may find that you frequently eat way more than one portion size.

“When you eat mindlessly, you are more likely to overeat, and you likely will not enjoy your food as much as you could have,” says Endicott. “In one of the Blue Zones—Okinawa, Japan—they have a practice called Hara Hachi Bu, which translates to ‘eat until you are 80% full.’ Saying this phrase before each meal reminds them to not eat too much, which allows Okinawans to tap into their body’s hunger and fullness signals. This strategy can help you, too: eating enough but not too much can keep you nourished while staving off excess pounds.”

If it helps, you may want to pre-portion out snacks to avoid mindless munching.

“Overeating can lead to obesity and further aggravate chronic conditions,” adds Blanca Garcia, RDN, a nutrition specialist for Health Canal.

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Processed foods are unhealthy in not one, but two ways: they tend to be loaded with excess sugar, salt, fat, calories, and other additives, and also lacking in essential vitamins, minerals, protein, fiber, water, and phytonutrients.

“High ultra-processed food intake is consistently correlated with increased risk of overweight, obesity, metabolic disorder, cancer, type-2 diabetes, cardiovascular diseases, irritable bowel syndrome, depression, and all-cause mortality,” explains Endicott. “Blue Zones residents focus on whole, natural foods that promote satiety and are packed with disease-fighting vitamins, minerals, fiber, and phytonutrients.”

Trista Best, RD at Balance One Supplements adds that some of the worst options you can have are processed meats (bacon, pepperoni, hot dogs, etc.), salty processed snacks, sugar-sweetened beverages, and packaged sweets.

“Packaged sweets should be avoided because they contain refined carbohydrates which are inflammatory, this can dull the immune system and is detrimental to gut health,” she explains. “Salty snacks contain preservatives and salt which increase the risk of other metabolic conditions like hypertension and cholesterol. And processed meats are off-limits due to their link to cancer and heart disease risks.”

According to Dana Ellis Hunnes, RD—a senior dietitian at UCLA medical center and author of Recipe For Survival—avoiding these foods can support longevity by lowering inflammation, a well-known predictor of chronic disease and early death.

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It’s not that Blue Zoners don’t drink—it’s that they do so in moderation, and they stick with polyphenol-rich wine. For example, Sardinians often enjoy a glass of Cannonau red wine with a meal. Dry reds are an excellent choice because they’re low in sugar and high in antioxidants.

In fact, a 2006 study in Nature found that reds from Sardinia and southwestern France are naturally higher in procyanidins, a type of antioxidant that’s been linked to promoting heart health. Chardonnay, Riesling, and sauvignon blanc are a few white wines with the highest antioxidant levels.

“If Blue Zone residents drink at all, it’s typically just one drink a day, and socially—not to be drunk,” explains Hunnes. “Alcohol is associated with increased risk of certain cancers, like breast and liver cancer, and early death.”

Remember: the 2020–2025 Dietary Guidelines for Americans recommends limiting alcohol intake to two drinks or less in a day for men and one drink or less in a day for women in order to prevent the health risks associated with alcohol.

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You don’t necessarily have to go vegetarian to live a long life—in fact, many Blue Zone residents still occasionally enjoy meat, fish, eggs, and dairy in their diets. That said, according to Endicott, the vast majority of their nutrients come from plant-based foods. Blue Zone residents typically only eat about two ounces of meat five times per month, about three ounces three times per week, and about two to four eggs per week.

“They do not consume animal foods in the same way that most Americans do,” she explains. “They consume them in smaller quantities alongside lots of other plant foods. By limiting their animal protein intake, they naturally avoid excess calories, saturated fat, and other potentially carcinogenic compounds.”

Rather than getting all of your protein from animal-based products, Garcia advises leaning into protein-rich beans, lentils, whole grains, vegetables, nuts, and seeds.

“By increasing plant-based protein you include healthy unsaturated fats, vitamins, minerals, and cholesterol-free protein,” she adds.

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Like meat, Blue Zone residents usually reserve sweets for special occasions and celebrations. They don’t eat many foods with added sweeteners and overall only consume around seven teaspoons of sugar per day. The average American consumes more than double that—about 17 teaspoons per day.

Regularly consuming excess sugar can shorten your lifespan by increasing your risk of type 2 diabetes, heart disease, and obesity. such as weight gain and obesity And added sugar isn’t just in the obvious foods like cookies and candy—it’s also hiding in many other unexpected foods like yogurts, cereals, smoothies, condiments, and even salad dressings. Make it a point to always check the nutrition label on processed foods to confirm the sugar content, and try not to exceed a max of 12 teaspoons per day. When you’re craving dessert, do like the Blue Zoners do and enjoy some fresh fiber-rich fruit, which will fill you up while satisfying that sweet tooth.

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The #1 Best Vegetable to Lower Cholesterol, Says Dietitian

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We get it, sometimes eating enough vegetables can be difficult. But if you skip out on veggies, you’re potentially missing out on tons of nutrients, vitamins, and health benefits.

For example, there are certain vegetables that contain heart-healthy and cholesterol-lowering nutrients. In fact, according to Lisa Young, PhD, RDN, author of Finally Full, Finally Slim and member of our medical expert board, carrots are some of the best veggies you can eat to help lower and manage your cholesterol levels.

“Carrots are a good source of soluble fiber, which can help reduce cholesterol levels. They are also rich in beta carotene, the vitamin A antioxidant that can protect you from chronic disease like heart disease,” says Young, “and the best part is, carrots are super versatile. You can munch on them with hummus, add them to a salad, or toast them with olive oil and garlic and enjoy them as a side dish.”

Continue reading to learn how carrots can help your heart, and for more healthy heart tips, check out Side Effects of High Cholesterol After 50.

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Carrots are almost always first associated with your eye health—and for good reason. They are rich in vitamin A, which has been known to help reduce your risk of certain eye diseases. They also contain lutein, which can help lower your risk of macular degeneration. But while carrots are great for your sight, their benefits don’t stop there.

According to Harvard Health, carrots make a great snack for helping your heart and reducing cholesterol because they’re easy to eat and are loaded with fiber.

The connection between dietary fiber and cholesterol is significant. A review published in Nutrients states that both insoluble and soluble fiber has been known to help lower blood cholesterol levels, which ultimately helps in reducing one’s risk of heart disease.

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Another study published in The Lancet found that eating at least 25 grams of fiber a day was known to help manage weight, blood sugar, blood pressure levels, and cholesterol.

Along with its fiber content, carrots can also provide heart-healthy benefits through its levels of beta-carotene. According to a study published in Circulation Research, beta-carotene was said to help reduce the risk of heart disease, cardiovascular disease, stroke, and some cancers.

Lastly, carrots contain vitamin A, which experts know has some connection to your heart health. However, much more research needs to be done before we can say for certain how vitamin A can help your heart.

So, next time you’re in the mood for a quick snack and want to try roasting some yummy vegetables in the oven, try grabbing some carrots and giving your body a dose of heart-healthy nutrients.

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