The primary difference between a low-carb diet and a ketogenic diet is the extent of carbohydrate restriction. A low-carb diet typically allows for a moderate reduction in carb intake, while a ketogenic diet significantly lowers carbohydrates to induce a state of ketosis, where the body burns fat for fuel instead of glucose. In a ketogenic diet, the macronutrient ratio is generally higher in fats, moderate in protein, and very low in carbs. This unique metabolic state can provide benefits for weight loss, energy levels, and certain health conditions, but it requires strict adherence to achieve desired outcomes.