Green vegetables will be an important part of your diet, no matter which you choose. Keto, Whole30, low-carb and more feature greens as a centerpiece.Vegetables do have some carbs, but they are so low you can easily maintain a diet of under 50 grams per day with a diet packed with fresh vegetables.This low-carb green smoothie recipe is a quick and easy way to get all of those healthy greens into your meal plan. The avocado provides a lot of healthy fats and the leafy green spinach has a serving of fiber.