营销话术证据 A · 指南级
水飞蓟 (奶蓟草) 护肝片能保肝、降酶、修复肝损伤
真相
口服吸收差且一进肝就被二相酶结合掉，活性型几乎到不了肝细胞；Cochrane 汇总对死亡率与并发症无效，SyNCH 用到常规 3-5 倍剂量仍与安慰剂无差异。
这话术为什么会流行
它是全球卖得最好的护肝草药，而且宣传时经常拿静脉水飞蓟宾治鹅膏菌中毒来站台。那确实是真的临床用途，但那是另一种分子形式、另一条给药途径、另一套作用机制——胶囊借不了它的光。
机制速览
机制讲完了, 现在看人身上的结果。这里要强调一件事: 这不是证据不足所以再等等的情况。该做的大试验做过了, 结果是阴性的。
来源（4）
- Rambaldi, A., Jacobs, B. P., & Gluud, C. (2007). Milk thistle for alcoholic and/or hepatitis B or C virus liver diseases. Cochrane Database of Systematic Reviews, (4), CD003620. No significant effect on mortality or complications of liver disease.
- Fried, M. W., Navarro, V. J., Afdhal, N., Belle, S. H., Wahed, A. S., Hawke, R. L., et al. (2012). Effect of silymarin (milk thistle) on liver disease in patients with chronic hepatitis C unsuccessfully treated with interferon therapy: a randomized controlled trial. JAMA, 308(3), 274-282. SyNCH trial, N=154, silymarin 420 or 700 mg three times daily × 24 weeks vs placebo: no significant difference in decline of serum ALT and no difference in HCV RNA — higher-than-customary doses did not help.
- Wah Kheong, C., Nik Mustapha, N. R., & Mahadeva, S. (2017). A randomized trial of silymarin for the treatment of nonalcoholic steatohepatitis. Clinical Gastroenterology and Hepatology, 15(12), 1940-1949.e8. N=99, silymarin 700 mg three times daily × 48 weeks: the primary histological endpoint (≥30% reduction in NAFLD activity score without worsening fibrosis) was not met; a reduction in fibrosis score was a secondary finding.
- National Center for Complementary and Integrative Health. (2025). Milk Thistle: Usefulness and Safety. Trial results for liver disease have been 'conflicting or too limited to allow conclusions'; two NCCIH-funded trials (hepatitis C and nonalcoholic steatohepatitis) showed no benefit. Allergic reactions can occur in people allergic to ragweed, chrysanthemum, marigold, and daisy.