When your blood sugar is stable, you don’t have afternoon energy crashes that make you want to fall asleep at your desk. When you don’t eat copious amounts of carbs, levels of insulin-the hormone that controls blood sugar-remain much steadier than they do on the carbohydrate-based diet most people are used to. One big reason people go keto is sustained energy. When ketones show up above a certain threshold in your urine or in a breath test, you’re officially in what’s known as ketosis, and your body is running on ketones. Restricting carbs and relying on dietary fat causes the liver to convert fat into molecules called ketones, which are used as fuel. (For more details on setting up various ketogenic diets, see our guide HERE. Fats, then, make up close to 75% of their calories. Strict ketogenic - or “keto” - dieters limit carbohydrate intake to about 5% of their daily calories while keeping protein intake at around 20%. Ketogenic diets originated in the 1920s as a treatment for epilepsy, but they’ve since been credited for promoting a number of health benefits ranging from improved insulin sensitivity to everyday mental clarity, in addition to fast weight loss. Now, what about those keto guys and gals? Other people go vegan for ethical reasons, believing animal consumption to be cruel and harmful to the environment. The authors of a 2016 study found evidence that reducing animal-based foods (when they’re conventionally raised on factory farms, that is, not organic) may reduce the incidence of diabetes, obesity, cataracts, and heart disease. There are many benefits to a vegan diet, including some that affect health and longevity.
Most vegans won’t eat gelatin (made from bones), casein (a milk protein), and fish oil supplements, or refined sugar (some brands of which use cow bones as a whitening agent). Like vegetarians, they don’t eat meat, poultry, or fish, but they also avoid dairy, eggs, and other foods that contain even trace amounts of animal ingredients. First, let’s be clear about what these terms “vegan” and “keto” really mean.
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