In addition to dietary recommendations for the general population, there are many specific diets that have primarily been developed to promote better health in specific population groups, such as people with high blood pressure (as in low sodium diets or the more specific DASH diet), or people who are overweight or obese (in weight control diets). However, some of them may have more or less evidence for beneficial effects in normal people as well.
Speaking of things you find in the sea, oysters have also been shown to contribute to weight loss thanks to their impressive zinc content. One study found that obese people who consumed 30 milligrams of zinc per day—the equivalent of just six raw oysters—had lower BMIs, weighed less, and showed improvements in blood cholesterol levels. If oysters aren’t your thing, spinach, pumpkin seeds, and mushrooms are also excellent sources of zinc.
Excess sodium, found in many processed foods and restaurant meals, raises blood pressure in some people and can have other adverse effects. The Dietary Guidelines recommend a limit of 2,300 milligrams a day for the general population; people with hypertension or prehypertension can benefit from a further reduction to 1,500 milligrams per day. As you cut back on sodium, eat more potassium-rich foods, which help lower blood pressure. These include citrus fruits, bananas, beans, avocados, some fish, and dairy products.
If you haven't jumped on the mushroom bandwagon yet, now's the time. Researchers from the University of Buffalo discovered that portobellos could help you lose weight thanks to their ability to regulate blood sugar (which can help prevent diabetes) and balance hormones. They also concluded that the fungus may help you exercise for longer periods of time, so use it as vegetarian-friendly burger base or toss into a tasty breakfast frittata.
“Fish is a great source of satiating protein and is typically lower in calories than other animal proteins,” says Maggie Moon, MS, RD, author of The MIND Diet. “Sardines are a sustainable seafood choice, which are packed with heart-healthy and brain-healthy omega-3 fats,” she says. These healthy fats can help decrease inflammation and improve your mood while dieting.
Like peanuts, avocados contain metabolism-enhancing monounsaturated fats that have been shown to reduce hunger. In fact, a study in Nutrition Journal found that participants who ate half a fresh avocado with lunch reported a 40 percent decreased desire to eat for hours afterwards. What’s more? The trendy toast topping is also loaded with unsaturated fats, which seem to prevent the storage of belly fat, as well as satiating fiber and free-radical-killing antioxidants.
These support bone health and have other possible benefits. Dairy products are the best sources of calcium, but you can also get it from fortified foods as well as canned salmon, sardines, dark leafy greens, and most tofu. If you can’t get the recommended 1,000 to 1,200 milligrams a day from food, take a calcium supplement. It’s hard to consume enough vitamin D from foods (the RDA is 600 to 800 IU a day, though other experts advise more). Thus, many people—especially those who are over 60, live at northern latitudes, or have darker skin—should consider taking a supplement.
Sure, nuts aren’t known for being low in calories, but they have an array of other properties—namely a high protein and fiber content—that makes them ideal for weight loss. A study published in the Journal of the American Heart Association, Circulation, found that consuming 1.5 ounces of almonds daily (as opposed to a carb-dense muffin) along with a heart-healthy diet, helped to improve cholesterol and lipid profiles among the research participants. The study also found that eating almonds reduces belly fat, too.