Korean Red Ginseng (KRG) is a traditional herbal medicine made by steaming and drying fresh ginseng. It strengthens the endocrine and immune systems to ameliorate various inflammatory responses. The cyclooxygenase-2 (COX-2)/prostaglandin E2 pathway has important implications for inflammation responses and tumorigenesis. Peroxisome proliferator-activated receptor gamma (PPARγ) is a transcription factor that regulates not only adipogenesis and lipid homeostasis but also angiogenesis and inflammatory responses.

Three greenhouse experiments with American ginseng seedlings growing under light levels from 4.8 to 68% showed a quadratic response for root dry weight giving an optimal root dry weight of 239 mg (range 160 to 415) at an optimal light level of 35.6% (range 30.6 to 43.2).