Heightole XL is a supplement that provides nutrients to enhance bone growth. It works by maximizing cartilage length, transforming cartilage into longer bones, and strengthening joints. It helps improve height and posture by lengthening and strengthening bones through increasing bone density and promoting calcium deposition into bones. Maintaining sufficient bone density is important for growth, as it allows bones to withstand increased length. Factors like smoking, lack of sleep, and poor nutrition can stunt growth.