Greens supplements are powdered blends of particular types of healthy foods. They may include vegetables, fruit, grasses or algae. Common vegetables include spinach, kale, broccoli, beetroot and more, while types of fruit include raspberries, blueberries, acai berries and goji berries. Grasses include wheatgrass and barley, and common algaes are seaweed and chlorella. These products are marketed as convenient ways for users to maintain a healthy diet and to ensure they reach their daily recommended intake of fruit and vegetables. This in turn is said to help boost the immune system, raise energy levels, help remove toxins from the body, improve cholesterol levels and regulate blood sugar.