You should base the majority of your meals around these foods:

• Meat: Red meat, steak, ham, sausage, bacon, chicken and turkey.
• Fatty fish: Such as salmon, trout, tuna and mackerel.
• Eggs: Look for pastured or omega-3 whole eggs.
• Butter and cream: Look for grass-fed when possible.
• Cheese: Unprocessed cheese (cheddar, goat, cream, blue or mozzarella).
• Nuts and seeds: Almonds, walnuts, flax seeds, pumpkin seeds, chia seeds, etc.
• Healthy oils: Primarily extra virgin olive oil, coconut oil and avocado oil.
• Avocados: Whole avocados or freshly made guacamole.
• Low-carb veggies: Most green veggies, tomatoes, onions, peppers, etc.
• Condiments: You can use salt, pepper and various healthy herbs and spices.

Here is a list of foods that need to be reduced or eliminated on a ketogenic diet:

• Sugary foods: Soda, fruit juice, smoothies, cake, ice cream, candy, etc.
• Grains or starches: Wheat-based products, rice, pasta, cereal, etc.
• Fruit: All fruit, except small portions of berries like strawberries.
• Beans or legumes: Peas, kidney beans, lentils, chickpeas, etc.
• Root vegetables and tubers: Potatoes, sweet potatoes, carrots, parsnips, etc.
• Low-fat or diet products: These are highly processed and often high in carbs.
• Some condiments or sauces: These often contain sugar and unhealthy fat.
• Unhealthy fats: Limit your intake of processed vegetable oils, mayonnaise, etc.
• Alcohol: Due to their carb content, many alcoholic beverages can throw you out of ketosis.
• Sugar-free diet foods: These are often high in sugar alcohols, which can affect ketone levels in some cases. These foods also tend to be highly processed.