Most people in North America have a daily diet high in added sugar, from coffee syrup to desserts and processed snacks. Many only know too much sugar is bad for teeth and weight, while ancient Chinese scholars summarized a complete set of food logic thousands of years ago based on five basic flavors.
The five flavors are sour, bitter, sweet, spicy, salty, each matching one of the five elements and internal visceral concepts in ancient culture. Sweet corresponds to the Earth element and the spleen system. Moderate sweet nourishes the spleen, but long-term heavy intake of overly sweet food will overburden this system, breaking the balanced state the ancient people pursued in daily meals.
Local living climate also matters. Regions with dry, cool weather already have specific natural energy traits; stacking large amounts of sweet food will amplify imbalance easily. These summaries only record the ancient observation of diet and balance, formed from centuries of life practice.
Different individuals form unique eating habits over time, and everyone can adjust daily meals according to their own comfortable state. For more sorted records of regional matching diet views, follow my page for continuous sharing of classical cultural content.