High sugar intake can lead to energy crashes, as it causes rapid fluctuations in blood glucose levels. Initially, consuming sugary foods may provide a quick burst of energy, but this is often followed by a swift decline in energy levels, resulting in fatigue and decreased productivity. Over time, a diet high in added sugars can contribute to weight gain, insulin resistance, and other metabolic issues, further exacerbating energy level problems and overall health. Managing sugar intake is vital for maintaining consistent energy and well-being.