Pseudostellaria heterophylla, also known as "Prince Ginseng" or "Tai Zi Shen," has been used in traditional Chinese medicine (TCM) for centuries. Its primary use in TCM is to tonify Qi (vital energy), especially in cases of Qi deficiency manifesting as fatigue, lack of energy, poor appetite, and general weakness. The herb is often prescribed as a milder alternative to Panax ginseng for individuals who are sensitive or for children, and it is considered to support the spleen and lung meridians, which are associated with energy and vitality in TCM theory.

The traditional basis for using Pseudostellaria heterophylla to address lack of energy is well documented in classic Chinese herbals and modern pharmacopoeias. However, scientific research on its efficacy is limited. Some in vitro and animal studies suggest potential adaptogenic, immunomodulatory, and anti-fatigue effects, but these findings are preliminary and insufficient to fully validate its use for boosting energy in humans. No large-scale, high-quality clinical trials have been conducted to confirm its effectiveness for this indication. Overall, its use for supporting energy primarily relies on traditional practice rather than robust scientific evidence.