Granted, probiotics have been on the scene for several years, but the next wave of digestive health products have arrived, and the idea of being good to your gut is likely to last into next year (and well beyond). And science backs up this wellness strategy. There are trillions of bacteria in your gut, and they’re largely responsible for keeping your immune system in fighting shape. Though we’re still in the early phases of research, it’s widely believed that a disruption to this delicate ecosystem, known as the microbiome, can lead to problems outside the digestive tract, such as body-wide inflammation, autoimmune diseases, and metabolic conditions, including weight gain and diabetes.
The keto diet changes the way your body converts food into energy. Eating a lot of fat and very few carbs puts you in ketosis, a metabolic state where your body burns fat instead of carbs for fuel. When your body is unable to get glucose from carbs, your liver converts fatty acids from your diet into ketones, an alternative source of energy. Burning ketones in place of glucose reduces inflammation and spurs weight loss.
But beyond that, experts aren't convinced that the keto diet has any other scientifically-proven health benefits. In fact, it may have some distinct downsides. If you follow the keto diet incorrectly, for example (like by eating lots of saturated fats, versus healthy unsaturated fats), you're at risk of raising your cholesterol levels. “The best strategy to keep your heart healthy is to get as much fat as possible from unsaturated sources such as olive, avocado and canola oils, nuts, seeds, avocados, and olives," says Ansel.
Cyclical keto diet: The Bulletproof Diet falls into this category. You eat high fat, low carb (less than 50 grams of net carbs a day) five to six days of the week. On day seven, you up your carb intake to roughly 150 grams, during what’s called a carb refeed day. Carb cycling this way helps you avoid the negative effects some people experience when they restrict carbs long term, like thyroid issues, fatigue and dry eyes. Learn more here about how carb cycling works.
When carbs go missing from a person's diet, the body uses up its glucose reserves and then breaks down stored fat into fatty acids. When fatty acids reach the liver, they're converted into an organic substance called ketones. The brain and other organs feed on ketones in a process called ketosis, which gives the diet its name. Keto-dieters eat lots of fat to maintain this state.
You’re transitioning. Your body is equipped to process a high intake of carbs and a lower intake of fat. Your body needs to create enzymes to be able to do this. In the transitional period, the brain may run low on energy which can lead to grogginess, nausea, and headaches. If you’re having a large problem with this, you can choose to reduce carb intake gradually.
Soft drinks, fruit juice, muffins, white rice and white bread are technically low in fat, for example, but the low-fat group was told to avoid those things and eat foods like brown rice, barley, steel-cut oats, lentils, lean meats, low-fat dairy products, quinoa, fresh fruit and legumes. The low-carb group was trained to choose nutritious foods like olive oil, salmon, avocados, hard cheeses, vegetables, nut butters, nuts and seeds, and grass-fed and pasture-raised animal foods.
Add spices or chilies to your food for a flavor boost that can help you feel satisfied. "Food that is loaded with flavor will stimulate your taste buds and be more satisfying, so you won’t eat as much," says American Dietetic Association spokeswoman Malena Perdomo, RD. When you need something sweet, suck on a red-hot fireball candy. It's sweet, spicy, and low in calories.