Ze Xie (Alisma orientale) is a perennial aquatic herb native to East Asia whose rhizome has been used in Traditional Chinese Medicine since at least the Han Dynasty, documented in the classical text Shennong Bencao Jing. It is classified as a 'dampness-draining' herb in TCM theory, meaning it promotes the downward movement of excess fluid through the urinary system. Modern phytochemical research has identified a family of protostane-type triterpenoids—collectively called alisols—as the primary bioactive constituents responsible for its pharmacological effects.

The alisol triterpenoids exert diuretic effects by inhibiting renal aquaporin expression and modulating renal tubular reabsorption, increasing urine output without significant electrolyte loss at standard doses. For lipid metabolism, Alisol B 23-acetate acts as a farnesoid X receptor (FXR) agonist and has been shown in cellular and limited human research to suppress hepatic lipogenesis, enhance bile acid metabolism, and reduce triglyceride synthesis. Anti-inflammatory activity has also been observed through inhibition of NF-κB signaling pathways, which may contribute to its utility in NAFLD.

The traditional preparation is a water decoction of the dried rhizome (6–15 g per day), often combined with other TCM herbs such as Zhu Ling and Fu Ling in classical formulas like Wu Ling San. Standardized extract capsules (typically 300–500 mg of a 5:1 or 10:1 extract) are the most common modern supplement form. Granulated instant decoction powders are widely used in East Asian clinical settings. Raw dried rhizome suitable for home decoction is also commercially available.

• Hypertriglyceridemia
• Non-Alcoholic Fatty Liver Disease (NAFLD)
• Edema / Fluid Retention
• Urinary Tract Discomfort
• Metabolic Syndrome

• Progression of hepatic steatosis in early NAFLD (limited preliminary clinical evidence)

Ze Xie is an isolated herbal extract with no meaningful dietary food source—you cannot obtain therapeutic alisol triterpenoids from common foods. However, dietary patterns that support the same biological pathways Ze Xie targets (lipid metabolism, liver health, fluid balance) include: (1) Oily fish such as salmon and mackerel, rich in omega-3 fatty acids that lower triglycerides and support FXR-related bile acid balance; (2) Cruciferous vegetables (broccoli, Brussels sprouts) that support hepatic detoxification and reduce liver fat accumulation; (3) Legumes and soluble fiber foods (oats, lentils) that lower LDL-cholesterol and support bile acid excretion; (4) Green tea, which contains EGCG with complementary lipid-lowering and mild diuretic properties; (5) Foods to limit: Refined carbohydrates, alcohol, and high-fructose corn syrup, all of which worsen hepatic triglyceride accumulation and counteract Ze Xie's lipid-modulating mechanisms.

• Gastrointestinal discomfort (nausea, bloating, loose stools) at higher doses
• Allergic skin reactions (rash, urticaria) — rare
• Electrolyte disturbance with excessive diuresis at high doses
• Potential hepatotoxicity with high-dose or prolonged use (rare in humans at standard doses)
• Dizziness or lightheadedness from excessive fluid loss
• Possible reproductive effects — not recommended during pregnancy

• Recommended daily: Dried rhizome decoction: 6–15 g per day (Chinese Pharmacopoeia standard range). Standardized extract capsules: 300–500 mg of a 5:1 or 10:1 extract, taken 2–3 times daily. Doses are typically at the higher end of this range for lipid-lowering indications and lower end for general fluid support.
• Best time of day: Traditionally taken in divided doses; morning and midday dosing is preferred to avoid increased urinary frequency disrupting sleep.
• With or without food: Best taken with food to reduce gastrointestinal irritation, particularly at higher doses.
• Time to effect: Diuretic effects: within 1–3 days. Lipid and liver-related effects: 4–12 weeks of consistent use.
• How long to take it: Short-to-medium term use (4–12 weeks) is best supported by available evidence. For chronic lipid management, periodic reassessment is recommended. Prolonged high-dose use beyond 3 months without medical supervision is not advised due to the unresolved question of long-term hepatic safety. Cycling (e.g., 8 weeks on, 4 weeks off) is a reasonable precautionary approach.