Polyunsaturated fats can primarily be found in plant-based foods and oils. Similar to monounsaturated fats, polyunsaturated fats can decrease the risk of heart disease by lowering levels of blood cholesterol (9). A certain type of polyunsaturated fat, omega-3 fatty acids have been found to be particularly beneficial for heart health. They not only lower the risk of coronary artery disease but can also lower blood pressure and protect against irregular heartbeats (9). Omega-3 fatty acids can be easily consumed by eating fatty fish such as salmon, sardines and trout.
But while there’s still a good amount of debate on the question “Is saturated fat bad?,” there’s no arguing that trans fats should be cut out of your diet altogether. Trans fats are often added to foods through a process called hydrogenation, which is used to increase the flavor and texture while extending the shelf-life of foods like vegetable oils.
Yes, you need fat in your diet! All three macronutrients – fats, carbohydrates, and protein – are incredibly important for the human body’s functioning. Fats are important for cellular and hormonal health, and unlike carbohydrates and protein, fats also provide our bodies with a layer of protection, literally insulating our organs and also helping keep a normal body core temperature.
Coconut is high in saturated fat, but more than half of that comes from lauric acid, a unique medium-chain triglyceride that battles bacteria, improves cholesterol scores, and, as a Journal of Nutrition study found, increases the 24-hour energy expenditure in humans by as much as 5 percent. And get this: A study published in Lipids found that dietary supplementation of coconut oil actually reduced abdominal fat. Sprinkle unsweetened flakes over yogurt or use coconut oil in a stir-fry to start whittling your waist. Need more reasons to get coconut in your diet? Check out these benefits of coconut oil.
Unfortunately, buying this healthy fat isn’t as easy as just grabbing the first bottle you see. Make sure to pick only extra virgin varieties of the oil, which means no chemicals are involved when the oil is refined. Unfortunately, many common brands have been shown to fail the standards for extra virgin olive oils, meaning it’s important to choose wisely.
All fats and oils contain fatty acids. You may be most familiar with Omega 3 fatty acids, found in fish oil. When you eat healthy fats and oils, the digestion process enables the fatty acids to be absorbed into the blood. Fatty acids are a component of fats and oils that become the building blocks of your body, helping to create cells membranes and nerve sheathing among other body functions.
Eggs are an inexpensive and easy source of protein. People often think egg whites are a healthier option than whole eggs because they contain less fat, but while it's true that the egg yolk contains some fat, it's also packed with important nutrients. One whole egg contains 5 grams of fat, but only 1.5 grams are saturated. Whole eggs are also a good source of choline (one egg yolk has about 300 micrograms), an important B vitamin that helps regulate the brain, nervous system, and cardiovascular system. As for the cholesterol? The latest nutrition research has found that eating cholesterol doesn't raise our blood cholesterol. In fact, research has linked moderate egg consumption to improved heart health.
Out of all lean meats, duck has the highest level of a muscle-building form of polyunsaturated fat called arachidonic acid, or AA. Supplementation of arachidonic acid has been shown to increase lean body mass, strength and anaerobic power in men. In a study at the University of Tampa, men who took AA gained 3.4 pounds more lean muscle mass than those who took a placebo. Keep bumping up the burn with these best foods for a toned body.
Consumption of hydrogenated and partially-hydrogenated fats is associated with cancer, atherosclerosis, diabetes, obesity, immune system dysfunction, low- birth-weight babies, birth defects, decreased visual acuity, sterility, difficulty in lactation and problems with bones and tendons (13). It has also been shown to increase the risk of depression (14).
CLA may also reduce the risk of heart disease, thanks to its high antioxidant levels and ability to lower bad cholesterol. (27) And grass-fed beef is often considered safer than grain-fed beef, as using antibiotics and hormones in grass-fed beef is much less common. Remember, you are what you eat eats, so you want to choose the best quality possible. And when it comes to beef and healthy fats, grass-fed beef is definitely the winner.
The type of fat with no redeeming nutritional value is trans fat, which is created when food manufacturers artificially convert unsaturated fatty acids into solid, saturated fats. Trans fats have the worst effect on your cholesterol levels, because they actually lower the good HDL cholesterol and increase the harmful LDL cholesterol. They're also highly inflammatory, which may contribute to chronic diseases, and they contribute to insulin resistance, which drives diabetes development.
The one-time fish oil supplements can really help is if you need to reduce your levels of triglycerides, a dangerous blood fat linked to heart disease. The American Heart Association recommends that people with extremely high triglycerides get 2 to 4 daily grams of omega-3s (containing EPA and DHA) in capsules -- but only in consultation with their doctors.
Additionally, a higher consumption of eggs can reduce your risk of metabolic syndrome, a cluster of conditions including factors like excess body fat, high blood sugar levels and abnormal cholesterol levels. Having any of these conditions makes you more likely to suffer from heart disease, stroke or type 2 diabetes. A 2016 study found that adults over 40 years old who regularly ate eggs significantly reduced their risk of metabolic syndrome. (10)
Most nuts and seeds are good healthy-fat choices, but almonds and walnuts are at the top of many experts’ lists as a great part of a heart-healthy diet to lower high cholesterol. “Almonds and walnuts are quick, delicious, and easy for a mid-morning or mid-day snack,” says Maria Haisley, RD, a clinical dietitian at Elkhart General Hospital in Indiana. “Make your own trail mix using your favorite ingredients or simply add to salads. Try using ground almonds as a coating on baked chicken or fish.” This chicken fingers recipe is a delicious way to do just that.
Trans fats are unsaturated fats that have been processed and as a result, behave like saturated fats. Eating trans fats increases the levels of ‘bad’ cholesterol and decreases the levels of ‘good’ cholesterol in the body which is a major risk factor for heart disease. It is important to lower the amounts of trans fats you eat to help you stay healthy.
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However, many experts disagree with the report’s conclusions on a few fronts. First, the link is based on the reasoning that saturated fat raises total cholesterol levels, but many studies suggest the link between higher cholesterol numbers and heart disease risk has been overstated. And while LDL is often referred to as “bad” cholesterol, there are different types of LDL, and the total number may be less important than the composition of the actual particles. Small, dense particles are inflammatory and associated with heart disease risk, while larger particles are not.
You'll primarily find saturated fat in animal-derived foods, particularly fatty red meat and processed meat. And while recent research has called into question exactly how big of a negative impact saturated fat has on your health, Harvard recommends replacing sources of saturated fat with unsaturated fat. Grilling up salmon instead of a burger, for example, fits the bill.
Investigators looked at the relationship between saturated fat intake and coronary heart disease (CHD), stroke, and cardiovascular disease (CVD). Their controversial conclusion: “There is insufficient evidence from prospective epidemiologic studies to conclude that dietary saturated fat is associated with an increased risk of CHD, stroke, or CVD.”(13)
Additionally, adding plenty of nutritious fats to your diet is just one piece of the puzzle when it comes to health. Be sure to round out your diet with plenty of protein foods as well as a good variety of fruits, vegetables, legumes and whole grains to make sure you’re meeting your nutritional needs, and pair a well-balanced diet with regular physical activity and a healthy lifestyle for best results.
Monounsaturated fatty acids. This is a type of fat found in a variety of foods and oils. Studies show that eating foods rich in monounsaturated fatty acids improves blood cholesterol levels, which can decrease your risk of heart disease. Research also shows that these fatty acids may benefit insulin levels and blood sugar control, which can be especially helpful if you have type 2 diabetes.
Bad fats or trans fats are often used in packaged goods such as chips, pretzels, cookies, fast food, shortenings and some margarine brands. They are even found in some brands of peanut butter. Because the body can't break them down, trans fats (or bad fats) attach to the arteries and may result in plaque formation, which can be linked to heart disease, diabetes, breast cancer and asthma, as well as other illnesses.
Salads are a healthy-eating staple. But not only can they sometimes leave us hungry, but they can also just become flat-out boring after awhile. Ingredients packed with healthy fats are an easy solution for both of those common issues. Healthy fats include unsaturated fats, monounsaturated fats, polyunsaturated fats, and Omega-3 fatty acids. Including healthy fats that are rich in protein and fiber to your salads is a great way to get a nutritional boost and feel full at the same time. Healthy fats come in a variety of food sources that are all very easy to use as salad add-ins. We talked to Beth Warren, registered dietitian and Author of Secrets of a Kosher Girl to learn her top picks for salad add-ins full of healthy fats.
But as you know, not all fats are created equal. Saturated and trans fats are the worst kind, as both increase the amount of bad cholesterol that enters the blood system. Bad fats also lead to inflammation, which can cause numerous debilitating diseases. All of the burgers, French fries, pizza and other greasy junk foods are loaded with these bad fats that can harm your body.
One cup of black olives has 15 grams of fat, but again, it is mainly monounsaturated. Plus, no matter what variety of olive you enjoy, they all contain many other beneficial nutrients as well, such as hydroxytyrosol, a phytonutrient that has long been linked to cancer prevention. New research is showing that this phytonutrient may play a role in reducing bone loss as well. And if you have allergies or other inflammatory conditions, olives might be just the snack for you as research suggests that olive extracts function as anti-histamines on the cellular level. Even with all these benefits, it is important to be mindful of your serving size as olives can be high in sodium. Stick to 5 large or 10 small olives as the perfect portion.
Two recent studies completely debunked the arguments for a low-fat, high-carb diet. In an August 2017 study published in the Lancet, scientists concluded “a high carbohydrate intake was associated with an adverse impact on total mortality, whereas fats including saturated and unsaturated fatty acids were associated with lower risk of total mortality and stroke. We did not observe any detrimental effect of fat intakes on cardiovascular disease events” (3).
The fact that many Americans still haven’t shaken off the decades-long notion that fat—and particularly saturated fat—is bad for you, isn’t even the biggest issue we face in adopting more fats into our diets. Many of us struggle to determine which fats we should be eating because the U.S. Dietary Guidelines (and nutrition labels) are both generalizing and misleading.
A fascinating Swedish study found that when diabetics ate a low-carb, high-fat diet (50 percent fat, 20 percent low-glycemic carbs, and 30 percent protein) they lost equal amounts of fat after 6 months (4 kg) as a group that ate a low-fat, high-carb diet (30 percent fat, 60 percent carbs, and 10 percent protein). The low-carb, high-fat group decreased insulin and had better blood sugar regulation than the high-carb group, indicating better metabolic chemistry.
Consuming monounsaturated fatty acids may protect you from heart disease by lowering LDL and total cholesterol, improve the function of blood vessels, help prevent depression, improve body composition, and improve insulin sensitivity and blood sugar control (10,11). Monounsaturated fats have even been shown to reduce cancer risk (12). Oils rich in monounsaturated fats also contain the antioxidant vitamin E which has many health benefits.
According to the guidelines, reducing saturated fat could lower the risk of heart disease if those fats are replaced with a type of “good fat” known as polyunsaturated fat. The only problem is that both heart-healthy omega-3s and inflammation-inducing, fat-storing omega-6s are included in that type of fat, and most Americans are already getting 20 times the amount of omega-6s than we really need, according to an analysis by researchers at the University of Maryland Medical Center.
The dietary reference intake (DRI) for fat in adults is 20% to 35% of total calories from fat. That is about 44 grams to 77 grams of fat per day if you eat 2,000 calories a day. It is recommended to eat more of some types of fats because they provide health benefits. It is recommended to eat less of other types of fat due to the negative impact on health.
Go nuts! Polyunsaturated fats in nuts activate genes that reduce fat storage and improve insulin metabolism. At about 13 grams per one-ounce serving, walnuts are one of the best dietary sources (they also have more omega-3 fatty acids than any other nut). A small Pennsylvania State study found that a diet rich in walnuts and walnut oil may help the body respond better to stress and can also help keep diastolic blood pressure levels down.
So how did fats get on the naughty list to begin with? Post-World War II, research began emerging that seemed to link foods with saturated fats, like eggs and red meat, to coronary heart disease. By the 1960s, the American Heart Association had recommended that people reduce their fat intake, and in 1976, the U.S. Senate held a series of committee meetings on the topic. Subsequent food guidelines advocated for eating less saturated fat and more carbohydrates, triggering a war on fat.
Trans fat. Small amounts of naturally occurring trans fats can be found in meat and dairy products but it’s artificial trans fats that are considered dangerous. This is the worst type of fat since it not only raises bad LDL cholesterol but also lowers good HDL levels. Artificial trans fats can also create inflammation, which is linked to heart disease, stroke, and other chronic conditions and contributes to insulin resistance, which increases your risk of developing Type 2 diabetes.
One way to combat inflammation is to eat more Omega 3s to help balance the ratio. But you can also look at your intake of omega 6s and try to cut back on those as well. Beef that is fed corn or grains is high in omega 6s (conversely grass-fed beef is high in omega 3s.) Safflower, sunflower corn, and cottonseed oils are all high in omega 6s. (Read labels for chips, crackers, cookies, and other processed foods, which often contain these oils.) Soybeans and corn are also high in omega 6s. Cutting back on processed foods and eating more cold water, high-fat fish can help get this ratio back in balance.
Get more avocados in your diet by trying one of these avocado recipes. Alternatively, use it to cook with by adding avocado oil to your kitchen pantry. It has a mild taste that won’t overpower dishes the way other oils might and also has a high smoke point, which means it works well for grilling or frying. And because it remains a liquid at room temperature, it’s a tasty choice to drizzle on salads, sandwiches or veggies.