Nutrient-dense, fiber-rich, low-carb foods like cruciferous veggies and leafy greens can help you achieve your goals on keto. Your body and brain use ketones for fuel, which are advantageous molecules your body produces when you switch to burning fat instead of sugar (carbs). 
A strict keto diet simply refers to a traditional and stricter approach to getting your body into ketosis that typically involves tracking macronutrients.
Macronutrients are the three main nutrients of the human diet: fat, protein, and carbohydrates. The goal is to consume a certain percentage of macros throughout the day. For example, someone on strict keto might have a goal of 25% protein, 70% fat, and 5% carbs. Check out our informative article for more info on how to track macronutrients. Especially for first-time keto dieters or beginners, it might be difficult to get your body into a state of ketosis. Tracking macronutrients can ensure you’re on track to getting into ketosis and can give you a better idea of how well you’re sticking to your chosen eating plan. 
Strict keto often involves counting calories, too.
Strict keto dieters often test their ketones and sometimes their glucose at home to see if they’re in ketosis, particularly if they’re dealing with blood sugar issues.
Lower Carbohydrate Count
Strict keto typically has a lower carbohydrate count (15-30 grams daily) to ensure your body reaches and maintains ketosis. The exact percentage, calories, and grams of carbohydrates you choose are up to you and vary from person to person. Some people on strict keto include keto sweeteners like erythritol, while others don’t. Sometimes, strict keto doesn’t involve tracking net carbs, but instead means tracking total carbs of 30 grams or less daily.
Focus on Healthier Natural Foods
To help their body get into ketosis and burn fat efficiently, those on strict keto often choose to stick to healthier whole foods over artificial and processed foods or keto junk foods. Many following strict keto aim for the therapeutic effects for health reasons as well as for weight loss, focusing on nutritious foods and tracking macronutrients. They might choose meal prep to make things easier and more streamlined.
Strict keto is sometimes called clean keto because of the shift to cleaner and healthier whole foods. On strict or clean keto, the closer a food is to nature, the better. When affordable and available, someone on clean keto might aim for higher quality foods and choose grass-fed beef, wild-caught seafood, free-range eggs, and non-GMO and organic products.
Sensitivities and allergies to gluten are everywhere these days. Gluten-free keto could be the best choice for those who are also dealing with a medical condition or allergy, such as an autoimmune disease. People tailor the keto diet to suit their individual needs. For some, that means giving up gluten or other common food allergens, like soy or eggs.
After they get the hang of it, strict keto dieters might implement intermittent fasting to ramp up their results. Fasting means refraining from eating food for a period of time to give your digestive system a break. This method works well for people who tend to eat too much too often, even if it’s low carb.
You already fast overnight during sleep (unless you’re raiding the fridge at 3 AM), and extending the time before you break your fast–for instance, by skipping breakfast–can help you get into ketosis and lose weight faster. Read our detailed article for more info on intermittent fasting.