High sugar consumption negatively impacts overall health by increasing the risk of obesity, type 2 diabetes, and cardiovascular diseases. Excessive sugar leads to spikes in blood glucose, followed by crashes that can cause cravings and lethargy. Additionally, high sugar intake can contribute to poor dental health and inflammation in the body. Moderation and making healthier choices, such as opting for natural sugars found in fruits, can help mitigate these risks and promote better overall well-being.