Some diets are very low in carbohydrates, like the ketogenic diet. On this diet, you consume most of your calories from fat and the rest from protein and carbs. The ‘keto diet’, as it’s commonly referred to, is sometimes prescribed by physicians to manage seizure disorders, but some dieters find it to be an effective means to lose weight. Another diet, the paleo diet — which is often thought of for sheer protein consumption — is, when looking across the macronutrient spectrum, low-carb as well.
Because sugar is the most obvious carb to remove from one’s diet, low-carb diets reduce sugar by default and keto diet minimize the possibility of fructose-induced metabolic dysfunction. In energy-replete humans—which is a significant portion of the population—excess sugar becomes deleterious.
Low carb is generally higher in protein than keto, but be careful with both. High protein diets can stress the kidneys, and besides, excess protein converts to glucose.

Another misconception that some nutrition professionals have is that a low-carbohydrate diet leads to deficiencies in vital nutrients. Grains can hinder the absorption of calcium, zinc and iron . However, you will continue to lose weight from the fat stores in your body, especially from the abdominal area where the ‘dangerous’ fat collects in the body . While this is a dangerous condition, it has nothing to do with going on a low-carbohydrate diet. This amount of carbohydrates works well for those who have diabetes or are obese.
Ketosis induced by a low-carbohydrate diet has led to reported cases of ketoacidosis, a life-threatening condition. This has led to the suggestion that ketoacidosis should be considered a potential hazard of low-carbohydrate dieting. As of 2016[update] it was unclear whether low-carbohydrate dieting had any beneficial effect on cardiovascular health, though such diets can cause high LDL cholesterol levels, which carry a risk of atherosclerosis in the long term. Potential favorable changes in triglyceride and HDL cholesterol values should be weighed against potential unfavorable changes in LDL and total cholesterol values.