To encourage ketone production, the amount of insulin in your bloodstream must be low. The lower your insulin, the higher your ketone production. And when you have a well-controlled, sufficiently large amount of ketones in your blood, it’s basically proof that your insulin is very low – and therefore, that you’re enjoying the maximum effect of your low-carbohydrate diet. That’s what’s called optimal ketosis.
Ranging from just-juice to just-tea cleanses, these typically short-term plans can be dangerous. “Detoxes and cleanses are usually low in calories, protein, and fiber, all nutrients that our bodies need to function,” says Alissa Rumsey, RD, who is in private practice in New York City. “These plans leave you feeling hungry and cranky, causing a rebound food binge once you stop the detox.”
Make your own. It’s easy! From one 14-ounce can of no-salt-added cannelini beans, spoon out 2 tablespoons of beans. Puree the rest. In a medium nonstick pot, sauté 5 cloves of chopped garlic until translucent. Add 2 cups low-sodium chicken broth and 1 head of escarole, chopped, or a package of frozen chopped spinach. Simmer for about 15 minutes. Add pureed beans, red pepper flakes and black pepper, to taste, and cook 1 minute longer. Garnish with the beans you spooned out plus, if you desire, a little chopped red bell pepper. Refrigerate or freeze what you don’t eat for easy soup prep for a future lunch or dinner.
This nutritionally sound book-based food plan is based on the research of Barbara Rolls, PhD, professor of nutrition at Penn State University. Rolls says you can lose one to two pounds per week on the plan. The theory is that by swapping out calorie-heavy fat-laden foods with fruits and vegetables that have a lot of water in them, you can eat more for fewer calories. To boost weight loss, you will need to be active—aim for 10,000 steps a day. You might not lose weight as fast, but Rolls has both short-term and long-term evidence to support her approach. Read more about it in Rolls’ latest book, The Ultimate Volumetrics Diet.
Portion control is another key element of weight loss. Part of the process is understanding an actual serving size. Measuring high-calorie ingredients will help you learn to eyeball portions. Even calories from healthy foods add up. “One of the foods people love are healthy fats, which are great,” Amari Thomsen, MS, RD, LDN, dietitian, and founder of Eat Chic Chicago says. Your definition of a handful of nuts might be four times bigger than an actual serving size, she warns.
Clinical nutritionist Stephanie Moore says intermittent fasting could be a great way to challenge the body to burn more fat and maintain muscle. Some studies have also found that regular short-term fasts could boost metabolism by 3.6 to 14 percent. Intermittent fasting is a convenient way to restrict calories without consciously trying to eat less. Many studies show that it is an effective weight loss strategy if people don’t overcompensate calorie-wise with their meals. Here are nutritionist-approved ways to speed up your metabolism.
The idea is that the fasting induces mild stress to the cells in your body, helping them become better at coping with such stress and possibly helping your body grow stronger. The verdict is still out regarding the diet’s long-term effectiveness with weight loss, according to a review of preliminary animal research published in January 2017 in Behavioral Sciences. (17)
This high-protein, fat-rich plan claims you will lose up to 15 pounds in two weeks, but the unhealthy fat content drops the diet’s ranking. Similar to the ketogenic diet, the idea is that by severely restricting your carb intake, your body will have to burn fat for energy. Atkins has a decent amount of short-term research to support the premise, but the results are mixed. The American Heart Association links saturated fats—prevalent in this plan—to heart disease. Other negatives for Atkins are that it’s tough to sustain, and you’ll miss out on fiber and other nutrients in complex carbohydrates like whole grains. Check out the 15 best Atkins diet foods you can get at the grocery store.
Be choosy about carbs. You can decide which ones you eat, and how much. Look for those that are low on the glycemic index (for instance, asparagus is lower on the glycemic index than a potato) or lower in carbs per serving than others. Whole grains are better choices than processed items, because processing removes key nutrients such as fiber, iron, and B vitamins. They may be added back, such as in “enriched” bread.
Try to do at least 30 minutes of moderate-intensity aerobic exercise, such as a fast walk or a low-impact aerobic class, five days a week. Additionally, you want to work out all the major muscle groups with strength-training exercises, such as lifting weights or using a resistance band, for 30 minutes two days a week. As you lose weight and your fitness level improves, you may want to increase your exercise to up to 60 minutes a day to burn more calories, but with your doctor's permission and supervision.