Myth #1: Eating fat will make you fat.

Truth: It’s true that fat is denser in calories than carbohydrates and proteins (more than twice the calories per gram), but obesity is not primarily due to an excess of calories consumed. It is the type of calories consumed that is important. Recent science shows that most surplus weight and obesity is caused by excess carbohydrates in the diet. Fats are a main source of energy. They are also an important source of fat-soluble vitamins and provide much of the pleasurable flavor and texture in food. Some (the omega fats) are, in fact, essential in our diet, as we can’t produce our own.

Myth #2: Saturated fats are bad for your heart.

Truth: There has never been any robust, conclusive evidence that saturated fats cause chronic disease. In fact, saturated fats are the cleanest-burning fuel you can put in your body. From a health perspective, saturated fats are not only benign, they’re beneficial.

Myth #3: Carbohydrates are essential to our bodies.

Truth: There are no essential carbohydrates. Your body evolved to make its own blood glucose from non-carbohydrate sources. When it does so, it makes the optimum amount for the present needs of the body. There are beneficial carbohydrates—soluble and insoluble fibers—but you can get plenty of these without also burdening your body with sugars and starch.

Myth #4: Gluten-free eating is the healthiest option.

Truth: If you have celiac disease or are gluten sensitive, by all means avoid gluten in your diet. Otherwise, keep in mind that most processed, gluten-free foods use substitutes like rice flour, potato starch, and tapioca flour. These and other starches rapidly raise blood glucose and insulin, aggravating diabetes and other chronic diseases. Gluten-free does not mean low-carbohydrate. In fact, it’s sometimes quite the opposite.

Myth #5: Everything in moderation.

Truth: To quote Canadian physician Dr. Jay Wortman, “Everything in moderation is an excuse we use to eat the things we shouldn’t eat.” Like the notion of a “balanced diet,” “everything in moderation” gives us license to trade off nutritious calories for empty ones. This is doubly dangerous when that junk food contains sugar, which activates the opiate receptors in our brain, stimulating our reward center. Each time we eat something sweet, we’re reinforcing those neuropathways and hardwiring our brains to crave the stuff. So, next time you catch yourself using “moderation” and “balance” as a rationale to consume foods you know are bad for you, it helps to remember that you’re not only fooling yourself, you’re compromising your health in the process.

Myth #6: To lose weight, you need to cut calories.

Truth: Cutting calories means you eat less food, and eating less food means you have less of an opportunity to meet daily nutritional requirements. If you are restricting calories to less than your daily needs, you will not only be perpetually hungry, but you will also reduce your metabolic rate, making weight loss more difficult. What’s more, once you return to your regular diet, there is a high probability that you will regain the weight you lost and are likely to put on even more.

Myth #7: Fruit is good for you because it’s natural.

Truth: Newsflash: fruit did not evolve to be a health food. Its evolutionary imperative is to spread its seeds, and the best way to do that is to get animals to eat it, move on, and deposit the seeds, some distance away, embedded in a healthy dollop of fertilizer. Sweet fruit is more attractive to animals—including humans—so job well done on the dispersal-system front. But the sweetness comes at a high cost not only in terms of high-carbohydrate starches but also fructose—a known toxin. The same goes for honey and maple syrup. Don’t be persuaded to buy and eat food simply because it’s considered natural.

Myth #8: All vegetables are created equal.

Truth: Many vegetables—especially root vegetables, beans, and grains (and, yes, I include grains as vegetables because they are plants)—are high in starch and can contribute to obesity and insulin resistance. Choose wisely.

Myth #9: If you work out, you can eat whatever you want.

Truth: Working out does burn calories, so your food intake should increase proportionally. However, science tells us that about 80 percent of weight management is determined by what you eat, not how many calories you burn. You lose weight in the kitchen; you get fit in the gym. If you eat poorly, exercise will not help you outrun the negative health consequences.

via The Bio Diet