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Diet and sexual desire are the greatest human desires, and they determine life and death. People in the world know that indulgence in sex will inevitably harm life; regarding diet, they only know that excessive drinking will lead to death. As for craving flavors and indulging one's mouth, causing diseases to accumulate, people fall into this trap without realizing the need for vigilance. The mechanism of disease onset is very subtle; it develops gradually until toxins manifest. Once a disease is established, people usually blame external influences of the Six Qi (Wind, Cold, Summer-heat, Dampness, Dryness, Fire) or internal injuries from the Seven Emotions (Joy, Anger, Worry, Overthinking, Sorrow, Fear, Fright), rarely repenting for their gluttony in daily life. Examining the *Huangdi Neijing* (Yellow Emperor's Inner Canon), it states: "When food enters the stomach, its essence floats up and is transmitted to the Spleen; the Spleen disperses the essence, sending it up to the Lung; it regulates water passages, transmitting them down to the Bladder; water essences distribute in all directions, flowing through all meridians." This describes the state of a healthy person, illustrating the benefit of grains and water to humans. Today, however, people do not regulate their diet, recklessly consuming rich and strong flavors, fearing they might miss out. This causes blood to boil and Qi to surge; combined with dryness and toxicity, clear Yang transforms into turbid Yin, meridians become obstructed and stagnant, and Qi and Blood cannot circulate freely. Diseases have already secretly proliferated, yet people remain unaware and unafraid. Although one may explain the nature of foods and state the pros and cons, when delicious food is before one's eyes and fragrant aromas reach the nose, drool flows uncontrollably; how can this be restrained? Some make excuses, claiming their digestive systems are robust and their fortune is strong, so indulgence is permissible. Indulging the mouth brings momentary pleasure, but accumulated over time, it inevitably leads to disaster. Ancient sages said, "Pleasant-to-taste foods cause illness; rich flavors harbor toxins." What does this mean? Some doubt the *Neijing*, citing "Deficient Jing should be supplemented with flavor" and "The Earth provides humans with Five Flavors," asking what harm there is in craving flavors. They do not realize that flavors originate either from Nature or from Human preparation. Grains like millet, beans, and wheat possess natural, balanced flavors beneficial for nourishing Yin; these are the "flavors from Heaven" mentioned in the *Neijing*. In contrast, human-prepared foods are often overly cooked and strongly flavored, posing risks of causing disease and harming life. Those who prefer balanced flavors exhibit restrained hearts and descending Fire; those who prefer strong flavors exhibit indulgent desires and flourishing Fire. Furthermore, when grains are eaten together with fatty and fresh meats, the strong flavors aided by grains accumulate over time, likely aggravating Deficient Fire and leading to conditions like malaria. Those accustomed to strong flavors simply have not reflected on this. The ancient text *Admonitions on Diet* states: "The poor in the mountains and fields eat blandly as a habit, move vigorously, and enjoy health. We share the same body, yet I suffer from illness. Once repentance arises, it is like dust clearing from a mirror." Thus, eating blandly ensures safety, while eating richly invites danger. Observing history, those living past 100 years are mostly commoners, whereas those in prominent families enjoying rich diets are rare. Is this due to fixed destiny, where some live long and others do not? Others might ask: "If everything that nourishes me is also my thief, should food be abandoned?" The answer is: Rich is inferior to bland, much is inferior to little. One must guard against disasters by being cautious and restrained, fear danger by persevering, and hold chopsticks as if holding spears. Do not sink into indulgence with meat-eaters; rather than betraying the belly given life by heaven, betray heaven itself. This is also a way to preserve health.

Craving flavors and indulging the mouth inevitably harms life, which has been repeatedly warned. Even daily vegetables differ in cold and hot natures, and their benefits or harms must be distinguished. If one does not pay attention and choose carefully in daily life, one will secretly suffer harm without knowing it. Here, we examine commonly used foods, consult various Materia Medica texts, and extract relevant information, hoping readers will know what to discard and select, exercising caution. According to various Materia Medica, there are dozens of old editions in the market, yet none are reliable. Some contradict each other in properties and flavors; some contradict themselves in benefits and harms; some list extreme taboos, leaving nothing safe to eat. Let us cite a few examples. Food records state that eating chicken with shrimp or carp causes carbuncles; eating mustard greens with carp causes heart masses (Xin Jia). Yet, in many dishes, these are eaten together without harm. It is also absurdly claimed that eating duck with turtle kills people, which is shocking and baseless. For a single item, some texts say it treats phlegm and tonifies Qi, while others say it generates phlegm and agitates Qi. Should one believe it treats phlegm and eat it, or believe it generates phlegm and avoid it? This leaves people confused. Why waste words? Only the *Jijie* (Collected Explanations) from Yanxi Hall refutes these claims well, stating that dietary taboos from various schools cannot be fully trusted. However, it accepts as credible statements like "When pigs are slaughtered, shock enters the Heart, and dying breath enters the Liver, so both are inedible," including them in the text. But did one not consider that all livestock have Hearts and Livers, and are they not shocked and dying at slaughter? Why is this unique to pigs? Moreover, if the Heart is inedible, why is it said that pig Heart enters the Heart to tonify it? If the Liver is inedible, why is it said that pig Liver enters the Liver to brighten the eyes? Such absurd and groundless theories are too numerous to recount. Here, we delete the繁杂 (complex/irrelevant) parts, correct the contradictions, classify commonly eaten items, analyze them, ensuring they are credible and easy to verify. This allows consumers to understand the nature of foods, carefully weigh their benefits and harms, thereby aiding those who practice health preservation in avoiding harm and seeking benefit.