There are actually three different types of omega-3 fatty acids: ALA (alpha-linolenic acid), DHA (docosahexaenoic acid) and EPA (eicosapentaenoic acid). The preferred sources of omega-3s are DHA and EPA, the kinds found in seafood sources like nutritious salmon and sardines. (19) ALA, on the other hand, is found in many plant foods, including nuts and seeds and certain vegetables like Brussels sprouts.
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.
Why are trans fats bad for you, polyunsaturated and monounsaturated fats good for you, and saturated fats somewhere in-between? For years, fat was a four-letter word. We were urged to banish it from our diets whenever possible. We switched to low-fat foods. But the shift didn't make us healthier, probably because we cut back on healthy fats as well as harmful ones.
The benefits of omega-3s include reducing the risk of heart disease and stroke while helping to reduce symptoms of hypertension, depression, attention deficit hyperactivity disorder (ADHD), joint pain and other rheumatoid problems, as well as certain skin ailments. Some research has even shown that omega-3s can boost the immune system and help protect us from an array of illnesses including Alzheimer's disease.
Trans fats are processed to prevent rancidity by combining liquid oil with hydrogen to make a solid fat. Trans fats are commonly found in margarines and vegetable shortening, cookies, crackers, baked goods, and fast-food French fries. Look for hydrogenated and partially hydrogenated fats or oils when you read labels, and avoid eating these foods if possible.
Got fat? While full-fat dairy packs more calories, it’s also more filling. That may help explain why a 2013 study review in the European Journal of Nutrition found that people who eat the fatty stuff are less likely to suffer from obesity than those who try and skip the calories and fat with low-fat dairy. The study authors also found no ties between full-fat dairy and heart disease or diabetes. Ironically, some acids in milk fat—ones you don’t get from zero-fat varieties—may crank up your body’s calorie-burning centers, says study coauthor Mario Kratz, PhD, an epidemiologist at the University of Washington.
Packed with protein, crammed with calcium, and popping with probiotics, yogurt has all the makings of one of the best foods you can eat for weight loss and general health. Just make sure you go Greek. Whole-milk, Greek yogurts tend to have more protein and fat and less sugar than their leaner versions, which makes for the perfect hunger-squashing team: protein takes longer to break down and fat makes you feel satisfied, so you’ll fly through your morning without an urge to snack.
Meanwhile, the Indian version of butter is quickly becoming a favorite across the globe. Ghee, or clarified butter, is simmered to bring out butter’s naturally nutty flavor, leaving it with a high smoke point that makes it ideal for cooking at high temperatures. Ghee benefits include being loaded in fat-soluble vitamins A and E. These types of vitamins are best absorbed by your body when they’re in a high-fat substance and then stored in your gastrointestinal tract, keeping your metabolism and digestion on track. It’s also lactose- and casein-free, which makes it a fantastic alternative to butter if you suffer from lactose sensitivity or intolerance.