Insamyangwi-tang (인삼양위탕) is a classical multi-herb decoction from Korean and Traditional Chinese Medicine, designed to warm, strengthen, and harmonize the stomach and digestive system. The formula typically contains around 10 individual herbs that each play a complementary role — from calming nausea to improving nutrient absorption. It is commonly prescribed by Korean Medicine doctors (Hanbang physicians) for people whose digestion has become weak due to illness, stress, or long-term poor eating habits.

The formula works by combining herbs that gently stimulate digestive enzyme activity, reduce inflammation in the stomach lining, and regulate the rhythmic muscle contractions that move food through the gut. Ginseng and atractylodes are the principal herbs — they support energy metabolism and help the gut absorb nutrients more efficiently. The aromatic herbs like citrus peel, magnolia bark, and cardamom help relax digestive tension and ease bloating and nausea, while ginger and jujube soothe and protect the stomach lining.

The traditional form is a freshly boiled decoction drunk warm, two to three times daily. Modern preparations include standardized granule powders (the most common clinical form in Korea today), capsules for convenience, and concentrated liquid extracts. Granules offer the best balance of clinical accuracy and convenience for most people.

• Nausea and vomiting
• Loss of appetite
• Functional dyspepsia (bloating, indigestion)
• Weak or sensitive stomach
• Post-chemotherapy digestive recovery
• Fatigue with poor digestion
• Chronic gastritis (mild)
• Post-illness recovery and rebuilding strength
• Irritable or unsettled stomach from stress

• Malnutrition risk during chemotherapy (by supporting appetite and reducing nausea, the formula helps patients maintain adequate nutritional intake)
• Worsening of functional dyspepsia symptoms with early and consistent use

Insamyangwi-tang is a multi-herb formula that is not found in food. However, several of its key ingredients are available as everyday foods and can support the same digestive and stomach-strengthening goals. Fresh ginger (add to meals, teas, or soups) directly mirrors the formula's anti-nausea and stomach-warming action. Jujube dates (eaten whole or brewed as tea) are a traditional digestive tonic used across East Asia. Cooked white rice congee is considered a classic 'stomach-strengthening' food in Korean and Chinese dietary medicine and is ideal for people with weak digestion. Bone broth provides easy-to-absorb nutrients and supports gut lining health. Foods rich in digestive enzymes — papaya, pineapple, fermented vegetables like kimchi — can support the gut motility goals of the formula. Avoid cold, raw, and heavily processed foods if you are using this formula, as they work against its stomach-warming intent.

• Mild bloating or gas (early use, usually settles within a week)
• Loose stools or mild diarrhea
• Mild headache (especially with ginseng sensitivity)
• Insomnia or mild restlessness in ginseng-sensitive individuals
• Elevated blood pressure with long-term use at high doses (licorice component)
• Rare allergic reactions to any individual herb in the formula
• Not recommended during pregnancy without practitioner supervision (Pinellia ternata requires caution)

• Recommended daily: Traditionally: 1 decoction daily, divided into 2–3 warm servings (approximately 200–300 ml per serving). Granule/powder form: 3–6 g per day in divided doses, or as directed by a licensed Korean or Chinese medicine practitioner. Capsule form: follow manufacturer's guidance, typically 2–4 capsules 2–3 times daily.
• Best time of day: Taken 30 minutes before meals (especially the main meals of the day) to prime digestive function. If prescribed for nausea, a dose before breakfast is particularly helpful.
• With or without food: Best taken on an empty stomach or 30 minutes before eating. Drink warm — cold preparations are considered less effective in traditional practice and may cause mild digestive discomfort.
• Time to effect: Nausea and appetite symptoms often begin improving within 1–2 weeks. Full digestive restoration and energy improvements typically take 4–8 weeks of consistent use.
• How long to take it: Typical clinical courses run 4–12 weeks depending on the condition. For post-chemotherapy support, the formula is often used throughout treatment cycles under practitioner supervision. Long-term continuous use (beyond 3 months) should be reviewed by a practitioner, particularly due to the licorice component.