Fasting should be based on the principles of being gentle and low-stimulus, with a reasonable and balanced nutritional mix. Avoid excessive consumption of the following foods.
First, avoid high-sugar foods. Consuming excessive amounts of sugar on an empty stomach, such as white sugar, brown sugar, pastries, or sweet potatoes, can cause a sharp spike in blood sugar. It can also disrupt the body's acid-base balance, leading to stomach discomfort, heartburn, and acid reflux.
Second, avoid foods high in protein. Consuming excessive amounts of high-protein foods like milk, soy milk, eggs, and meat on an empty stomach forces protein to be "compelled" to be converted into energy for consumption, negating its nutritional and nourishing effects. Furthermore, a large accumulation of protein over a short period can produce a significant amount of harmful substances during its breakdown, such as urea and ammonia, which is detrimental to health.
Third, avoid highly stimulating foods. Consuming highly stimulating foods on an empty stomach, such as overly spicy, sour, salty, or frozen items, can damage the gastric mucosa or intestinal walls, causing gastrointestinal cramps and pain, and triggering gastrointestinal diseases. For women during their menstrual period, it can lead to irregular menstruation and menstrual cramps.