Keigairengyoto is a complex, 17-herb Kampo formula that has been used in Japan for centuries to address chronic inflammatory conditions — particularly those affecting the head, face, and upper respiratory tract. It is one of the more widely prescribed Kampo formulas in modern Japanese clinical practice, available as standardized extract granules from manufacturers like Tsumura. The formula blends heat-clearing, blood-moving, and detoxifying herbs into a balanced preparation tailored to a specific constitutional pattern.

The formula works through several overlapping actions: its heat-clearing herbs (Forsythia, Gardenia, Phellodendron) help calm inflammatory signaling; blood-moving herbs (Angelica, Cnidium, Peony) improve circulation and reduce tissue congestion; and herbs like Platycodon and Schizonepeta help open and drain the upper respiratory passages. Together, they address the root cause of recurring inflammation rather than just suppressing symptoms.

In Japan, Keigairengyoto is most commonly dispensed as standardized hot-water extract granules (e.g., Tsumura TJ-50), which are dissolved in warm water and taken before meals. Traditional boiled decoctions are also used by Kampo practitioners who prefer custom dosing. Capsule or tablet forms are less common but available in some markets.

• Chronic sinusitis and nasal congestion
• Acne and inflammatory skin conditions
• Chronic tonsillitis and sore throat
• Allergic rhinitis
• Otitis media (ear inflammation)
• Skin conditions with redness and pus
• Recurrent upper respiratory infections
• Eczema and itchy skin

• Recurrence of chronic sinusitis episodes
• Recurrent tonsillitis flare-ups in susceptible individuals

Keigairengyoto is a complex herbal formula and is not found in food. However, an anti-inflammatory dietary pattern strongly supports the same goals: emphasize foods rich in quercetin and flavonoids (onions, apples, berries), omega-3 fatty acids (salmon, sardines, flaxseed), and fermented foods (miso, kimchi, yogurt) for gut-immune support. Reduce sugar, refined carbohydrates, and dairy if you are prone to mucus congestion or inflammatory skin — these are frequently identified triggers in Kampo dietary guidance. Warm, lightly cooked foods are traditionally preferred over raw or cold foods when taking this formula, as they support the digestive system that processes all 17 herbs.

• Mild stomach upset or loose stools (most common, usually early in treatment)
• Nausea or reduced appetite
• Skin rash or hypersensitivity reaction (rare)
• Elevated liver enzymes with prolonged use (rare, monitoring recommended)
• Headache on first use (uncommon, usually transient)

• Recommended daily: Standard Japanese Kampo prescription: 7.5 g/day of dried extract granules (e.g., Tsumura TJ-50), divided into 2–3 doses. This is equivalent to approximately 15 g of raw crude herb per day in decoction form.
• Best time of day: Traditionally taken before meals — typically 30 minutes before breakfast, lunch, and dinner — to maximize absorption on a relatively empty stomach.
• With or without food: Take before meals on an empty or near-empty stomach. Dissolve granules in warm (not boiling) water for best absorption. Avoid taking with cold drinks.
• Time to effect: Initial improvement in sinus and skin symptoms typically within 4 weeks; full benefit often seen at 8–12 weeks of consistent use.
• How long to take it: For chronic conditions like sinusitis or acne, a course of 8–12 weeks is typical in clinical practice, followed by reassessment. Some patients use it seasonally or long-term under practitioner supervision. Not intended as a permanent daily supplement without periodic review.