Forsythia suspensa (Lian Qiao) is a flowering plant used in traditional Chinese medicine. Its compounds act as antioxidants and help reduce inflammation.
People take it mainly to support immune function during seasonal shifts. You can find it as a tea, tincture, or in proprietary herbal blends.
Most human evidence rests on traditional use, and modern scientific studies are still preliminary. Dosage varies by form. Forsythia suspensa is well tolerated by most people.