The key principles of the Keto Diet include: 1. High Fat Intake: The diet emphasizes consuming healthy fats from sources like avocados, nuts, olive oil, and fatty fish. 2. Low Carbohydrate Intake: Carbohydrates, especially refined sugars and starches, are limited to encourage ketosis. 3. Moderate Protein Intake: Protein intake is moderate to prevent excessive gluconeogenesis, which could inhibit ketosis. 4. Ketosis: The primary goal is to achieve and maintain ketosis, where the body burns fat for energy.