What is Bofutsushosan?

Bofutsushosan is an 18-herb Kampo formula with origins in 12th-century Chinese medicine, now widely prescribed in Japan for obesity-related conditions. It combines herbs that promote bowel movement, improve circulation, reduce water retention, and support fat metabolism. In Japan, it is one of the most commonly prescribed Kampo formulas for overweight patients with constipation and metabolic syndrome.

How does Bofutsushosan work?

The formula works through several complementary actions: rhubarb and mirabilite act as mild laxatives to clear intestinal buildup, ephedra and gypsum support thermogenesis and heat clearance, and herbs like scutellaria and gardenia reduce inflammation linked to metabolic dysfunction. Together, these ingredients are thought to improve fat breakdown, reduce visceral fat accumulation, and support healthy insulin and lipid levels.

What forms does Bofutsushosan come in?

In Japan, Bofutsushosan is most commonly dispensed as standardized extract granules (notably Tsumura TJ-62), which are dissolved in hot water and taken as a tea-like preparation. Tablets and capsules are available internationally. The granule form is considered most authentic and is what most clinical trials have used.

Where it comes from:

This formula was first recorded in the Chinese medical classic 'Xuanming Lun Fang' (宣明論方) by Liu Wansu during the Jin Dynasty (circa 1172 AD). It was later adopted into the Japanese Kampo tradition and is now covered under Japan's national health insurance for obesity and constipation, making it one of the most clinically studied traditional formulas in the country.

What does Bofutsushosan help with?

• Abdominal obesity and belly fat: Bofutsushosan is best known for reducing visceral fat — the deep belly fat that wraps around organs and drives metabolic problems. Studies show it can meaningfully reduce waist circumference and body fat percentage over 8 to 24 weeks, even without dramatic diet changes.
• Metabolic syndrome: The formula targets multiple components of metabolic syndrome at once — excess abdominal fat, elevated blood sugar, unhealthy cholesterol levels, and elevated blood pressure. This broad action makes it one of the few natural treatments studied specifically for the full metabolic syndrome picture.
• Constipation: Rhubarb and mirabilite in the formula act as gentle stimulant laxatives, and most users notice improved bowel regularity within a few days. This is one of its most consistent and fastest-acting benefits.
• High blood sugar / prediabetes support: Several clinical studies show reductions in fasting blood glucose and HbA1c with regular use, particularly in overweight patients with insulin resistance. It appears to support better blood sugar regulation alongside its weight-reducing effects.
• High cholesterol and triglycerides: Bofutsushosan has been shown to lower LDL cholesterol and triglycerides while modestly improving HDL in people with obesity-related lipid abnormalities. The effect is thought to relate to improved fat metabolism and gut transit time.
• Non-alcoholic fatty liver (NAFLD): Emerging clinical research suggests this formula can reduce liver fat accumulation and improve liver enzyme levels in people with NAFLD tied to obesity. Its combination of anti-inflammatory and gut-motility herbs is thought to reduce the liver's fat burden.
• High blood pressure (mild): Some studies have reported modest reductions in blood pressure alongside weight loss in patients taking Bofutsushosan, likely as a secondary benefit of reduced visceral fat and improved insulin sensitivity rather than a direct antihypertensive action.
• Insulin resistance: By reducing visceral adiposity and lowering systemic inflammation, Bofutsushosan may help the body respond more effectively to insulin. This makes it potentially useful as a supportive therapy for people in early stages of metabolic dysfunction.
• Inflammation linked to obesity: Visceral fat drives low-grade chronic inflammation, and several herbs in this formula — especially scutellaria and forsythia — have documented anti-inflammatory actions. Clinical use suggests the formula can reduce markers of inflammation that accompany obesity.

What can Bofutsushosan help prevent?

• Progression from metabolic syndrome to type 2 diabetes (supportive evidence in high-risk overweight patients)
• Worsening of visceral fat accumulation over time in obese individuals

Which foods are rich in Bofutsushosan?

Bofutsushosan is a multi-herb formula with no direct food equivalent, but a dietary pattern that supports the same goals is well established. Emphasize high-fiber vegetables (especially cruciferous ones like broccoli and cabbage), bitter foods like dandelion greens and radicchio that support liver and bile function, fermented foods like miso and kimchi for gut health, and green tea for thermogenic and metabolic support. Avoid processed carbohydrates, fried foods, and excess alcohol, which directly counteract the formula's fat-clearing and liver-supporting actions. Eating within a reasonable window and reducing late-night eating also reinforces the formula's metabolic benefits. Foods to limit: Processed and fried foods (counteract metabolic effects), Excess alcohol (adds liver stress and increases visceral fat), Refined carbohydrates and sugary beverages (worsen insulin resistance the formula targets), Excessive sodium (counteracts blood pressure benefits).

What are the side effects of Bofutsushosan?

• Loose stools or diarrhea (especially early on, due to rhubarb and mirabilite)
• Stomach cramping or nausea
• Loss of appetite
• Sweating or feeling warm (from ephedra component)
• Elevated heart rate or palpitations (rare, ephedra-related)
• Elevated liver enzymes with prolonged use (rare but documented — monitor with long-term use)
• Hypokalemia (low potassium) with extended use due to licorice content
• Skin reactions or rash (rare)

Good to know:

Bofutsushosan is generally safe when used at standard Kampo doses for up to 24 weeks. The most important long-term concern is rare drug-induced liver injury, which has been documented in post-marketing surveillance in Japan — liver enzyme levels should be monitored with extended use. People with cardiovascular conditions should use caution due to the ephedra content.

How much Bofutsushosan should you take?

• Recommended daily: 7.5 g of standardized extract granules per day (Tsumura TJ-62 formulation), typically divided into 2 to 3 doses. This is the dose used in Japanese clinical trials and insurance-covered prescribing.
• Best time of day: Before meals — traditionally taken 30 minutes before eating to support digestive and metabolic action. In Japan, it is commonly divided into morning, midday, and evening doses before meals.
• With or without food: Take before meals, on an empty or near-empty stomach. The granule form is dissolved in hot water and sipped like a tea.
• Time to effect: Constipation relief: days. Weight and metabolic effects: 8 to 12 weeks of consistent use; meaningful changes in visceral fat often seen by 12 to 24 weeks.
• How long to take it: Clinical studies have used it continuously for up to 24 weeks. For ongoing use beyond 3 to 6 months, liver enzyme monitoring is advisable. Work with a qualified Kampo practitioner or integrative physician for long-term management.