Pseudostellaria heterophylla, commonly known as "Tai Zi Shen" or "Prince Ginseng," has a long-standing role in traditional Chinese medicine (TCM), especially in the context of convalescence. Historically, it is categorized as a mild tonic herb used to "tonify Qi," particularly in individuals recovering from illness, surgery, or general debility. Classical TCM texts and materia medica describe its use for symptoms associated with post-illness weakness, fatigue, loss of appetite, and spontaneous sweating—common features during convalescence. It is often recommended for those who are too weak to tolerate stronger tonics such as Panax ginseng.

Scientific studies on Pseudostellaria heterophylla are limited, and most evidence supporting its use for recovery after illness comes from traditional practice rather than rigorous clinical trials. Some pharmacological research indicates potential immunomodulatory and adaptogenic effects in vitro and in animal models, but these findings have not been robustly translated into clinical settings or convalescent populations. Therefore, while its use is deeply rooted in TCM and supported by centuries of clinical tradition, scientific validation remains preliminary. Given this, its rating is based on traditional evidence rather than strong scientific proof.