EzineArticles.com: What is Keto? The Keto diet involves going long spells on extremely low (no higher than 30g per day) to almost zero g per day of carbs and increasing your fats to a really high level (to the point where they may make up as much as 65% of your daily macronutrients intake.)

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What Is the Keto Diet?

EzineArticles.com: Fad diets, low-carbohydrate diets and low-fat diets may promise fast weight loss through the use of supplements, meal replacements and other products but the real secret to permanent weight loss is through the restriction of total daily caloric intake while still providing for balanced nutrition.

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Calorie Restrictions for Weight Loss Explained