It acts as a cofactor for enzymes involved in the synthesis of collagen, carnitine, and certain neurotransmitters, and it helps regenerate other antioxidants such as Vitamin E
Increased adiponectin also reduces blood glucose levels and improves insulin sensitivity, appetite control, central fat distribution (smaller waist size) as well as muscle regeneration, thus acting as a protective factor to prevent loss of muscle mass
Caffeine and L-theanine bring out the best in each other and have a pronounced synergistic effect, often referred to as a nootropic, meaning that you experience heightened focus and energy and improved mental endurance but without the jitters
Research shows staying hydrated supports a healthy metabolism and may help reduce overeating
Caffeine, when consumed in excess, can also overstimulate the digestive tract and contribute to anxiety, jitters, or worsened nausea