This article is for educational purposes only and is not medical advice. The foods, teas, and practices described here are traditional wellness practices rooted in Chinese culture. They are not a substitute for professional medical care, diagnosis, or treatment. Some foods and herbs may interact with medications — always inform your doctor about everything you consume. These statements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Read our full disclaimer →
Solar Term Origin (节气由来)
Dashu (大暑), meaning "Major Heat," is the twelfth solar term and the hottest period of the year, typically falling on July 22nd, 23rd, or 24th. The ancient saying "Minor Heat is not hot, Major Heat is boiling" distinguishes this period as the absolute peak of summer heat. Temperatures reach their highest, humidity is suffocating, and thunderstorms provide only temporary relief. This is the height of the "dog days" (三伏天), and the body is tested to its limits.
Agriculturally, Dashu was a period of both growth and risk. Rice headed and flowered, cotton set bolls, and various crops reached maturity. However, the intense heat and potential drought or flooding posed constant threats. Farmers worked early mornings and late evenings to avoid the midday sun, and irrigation was critical. The saying "Dashu does not appear, the harvest will be thin" reflected the agricultural anxiety of this period. In coastal regions, typhoon season began, adding another layer of uncertainty.
Dashu food traditions are all about beating the heat. The most iconic is grass jelly (仙草/烧仙草), a cooling jelly made from the mesona plant, traditionally served with honey or syrup. In southern China, the custom of eating mung bean congee (绿豆粥) was universal — every household would simmer mung beans with rice and rock sugar for a cooling, nourishing meal. In some regions, the tradition of drinking herbal tea (伏茶) was practiced, with cooling herbs brewed in large vats and offered free to passersby. The practice of "drying things in the sun" (晒伏) was also common, as the intense sun was believed to kill insects and mold.
Seasonal Food Therapy Principle (季节食补)
In Traditional Chinese Medicine, Dashu represents the ultimate test of the body's heat tolerance. The combination of extreme heat and humidity creates conditions of summer heat with dampness that can severely deplete the body's qi and yin. The heart is overstimulated, the spleen is weakened by dampness, and the lungs are stressed by the heat. Profuse sweating depletes both fluids and the defensive qi, leaving the body vulnerable to summer colds and fatigue. The concept of "summer heat injuring qi" (暑伤气) is central to understanding this period. The TCM principle for Dashu is to clear heat, resolve dampness, and benefit qi — a three-pronged approach that addresses all the body's needs simultaneously.
The dietary approach during Dashu must be the most comprehensive of the entire year. Grass jelly, the signature food, is cooling, sweet, and specifically used to clear summer heat and resolve toxicity. Mung beans and barley (coix seed) form the classic heat-clearing, dampness-resolving congee. Dendrobium (shi hu), a precious yin-nourishing herb, is simmered with old duck to create a tonic that clears heat while replenishing fluids. American ginseng (xi yang shen) benefits qi and nourishes yin without being warming — perfect for the hottest days. Lotus leaf, used to steam fish or brew tea, clears heat and resolves dampness. The key is consistent, gentle cooling and nourishment: eat light, hydrating meals throughout the day, and avoid any foods that would add heat or burden the digestive system.
Solar Term Menu (节气菜单)
The following Dashu menu features ingredients traditionally used to clear heat, resolve dampness, and benefit qi during the most extreme heat of the year.
Hot Dishes (热菜)
| Dish | TCM Benefit |
|---|---|
| Lotus-Herb Five-Element Tea (莲荷五行大暑茶) | A balanced blend of lotus herbs that clears heat across all five organ systems |
| Stir-fried Squid with Celery (西芹炒鲜鱿) | Celery clears heat and calms the liver; squid nourishes yin and blood |
| Steamed Fish with Lotus Leaf (荷叶蒸鱼) | Lotus leaf clears heat; fish nourishes yin and strengthens the spleen |
Cold Dishes (凉菜)
| Dish | TCM Benefit |
|---|---|
| Grass Jelly with Honey (仙草蜜) | Grass jelly clears heat and resolves toxicity; honey nourishes and moistens |
| Cold Tossed Bitter Melon (凉拌苦瓜) | Bitter melon clears heart fire and resolves heat toxicity |
Soups (汤品)
| Dish | TCM Benefit |
|---|---|
| Mung Bean-Barley Congee (绿豆薏米粥) | Mung beans clear heat; barley drains dampness — the quintessential Dashu remedy |
| Dendrobium-Old Duck Soup (石斛炖老鸭) | Dendrobium nourishes yin and generates fluids; old duck clears heat and strengthens |
Staples (主食)
| Dish | TCM Benefit |
|---|---|
| Mung Bean-Barley Congee (绿豆薏米粥) | The classic Dashu staple: clears heat, drains dampness, and is easily digested |
| Lotus Seed Congee (莲子粥) | Lotus seeds calm the heart and strengthen the spleen during the peak heat |
Snacks / Desserts (小吃/点心)
| Dish | TCM Benefit |
|---|---|
| Grass Jelly (烧仙草) | The most iconic Dashu cooling food; clears heat, resolves toxicity, and refreshes |
| Mung Bean Cake (绿豆糕) | Mung beans clear heat and detoxify; a cooling, nourishing summer sweet |
Teas (茶饮)
| Dish | TCM Benefit |
|---|---|
| American Ginseng Tea (西洋参茶) | Benefits qi, nourishes yin, and clears heat without warming — ideal for the hottest days |
| Green Tea (绿茶) | Clears heat, generates fluids, and provides antioxidant support |
Foods to Favor / Avoid (饮食宜忌)
Foods to Favor
- Heat-clearing, toxicity-resolving foods: Grass jelly, mung beans, bitter melon — the most powerful natural coolants for the body.
- Dampness-resolving foods: Coix seed, lotus leaf, winter melon — help the spleen cope with oppressive humidity.
- Qi and yin benefiting foods: American ginseng, dendrobium, duck, lotus seeds — replenish what the heat depletes.
- Cooling, hydrating meals: Congees, soups, grass jelly, herbal teas — consistent fluid intake is essential during the peak heat.
Foods to Avoid
- Warming, spicy foods: Chili, pepper, cinnamon, lamb — the body needs no additional heat during the hottest period.
- Greasy, heavy foods: Deep-fried dishes, fatty meats — generate heat and dampness, burdening the spleen.
- Ice-cold foods in excess: While cooling foods are needed, excessive ice can damage the spleen; favor cool over freezing.
- Alcohol and caffeine: Both heat the body, deplete fluids, and stress the heart during the most demanding period.
Frequently Asked Questions
Why is grass jelly the signature food of Dashu?
Grass jelly (仙草, also called 烧仙草) is the signature Dashu food because it is one of the most effective natural cooling foods in Chinese tradition. Made from the mesona plant (仙草), grass jelly is sweet, cooling, and specifically used to clear summer heat, resolve toxicity, and quench thirst. In TCM, it enters the heart, liver, and kidney channels. During the hottest period of the year, grass jelly served with honey or syrup provides immediate cooling relief. It is also rich in polysaccharides that support hydration. This is a traditional food therapy practice, not a medical treatment.
What is the TCM principle for eating during Dashu?
During Dashu, the TCM principle is to clear heat, resolve dampness, and benefit qi. This is the hottest period of the year, and the body faces the triple challenge of extreme heat, humidity, and qi depletion. Heat-clearing foods like grass jelly, mung beans, and bitter melon cool the body. Dampness-resolving foods like coix seed and lotus leaf help the spleen cope with humidity. Qi-benefiting foods like American ginseng and dendrobium replenish what the heat depletes. The approach must be comprehensive, addressing all three aspects simultaneously. These are traditional wellness practices, not medical treatments.
Why is American ginseng recommended during the hottest days?
American ginseng (西洋参, xi yang shen) is recommended during Dashu because it is uniquely suited to summer conditions. Unlike Asian ginseng (ren shen), which is warming, American ginseng is cooling in nature. It benefits qi, nourishes yin, clears heat, and generates fluids — all without adding warmth to the body. During the peak of summer, when profuse sweating depletes both qi and yin, American ginseng provides the perfect replenishment. It can be brewed as a tea, simmered in soups, or taken as slices. This is a traditional TCM wellness practice, not a medical treatment. Consult your healthcare provider before using any herbal supplement.
This article shares traditional wellness practices for educational purposes only. It is not a substitute for medical advice, diagnosis, or treatment. The foods, teas, and practices described here are not intended to treat, cure, or prevent any disease. If you have a medical condition, take medications, are pregnant, or experience concerning symptoms, consult your healthcare provider before making dietary changes. These statements have not been evaluated by the FDA. Read our full disclaimer →