A keto diet is a low-carbohydrate, high-fat eating pattern that pushes the body to use fat as its main energy source. Weight loss may happen because appetite often reduces, and the body starts burning stored fat. A proper keto plan usually includes eggs, fish, chicken, paneer, cheese, nuts, seeds, healthy oils, avocado, and low-carb vegetables such as spinach, cucumber, cauliflower, and broccoli. Foods like sugar, sweets, soft drinks, rice, bread, potatoes, and most packaged snacks are usually restricted. Rapidly cutting carbohydrates can sometimes cause headache, weakness, constipation, dehydration, or muscle cramps during the first few days. Drinking enough water, maintaining electrolytes, and eating adequate protein are important to avoid fatigue and muscle loss. Gradual and sustainable weight reduction is usually safer than very aggressive dieting. People with kidney disease, liver problems, diabetes, pancreatitis, or high uric acid should be careful before starting keto. Persistent dizziness, severe weakness, or palpitations during dieting should be assessed properly.