Am J Chin Med. 1981 Autumn; 9(3): 243-8.

An experimental study on the enhancing effects of phenylalanine on acupuncture analgesia.

Kitade T, Minamikawa M, Nawata T, Shinohara S, Hyodo M, Hosoya E.

In this preliminary study we examined the enhancing effect of D-phenylalanine on acupuncture anesthesia. We made 4 different kinds of experiments with 3 volunteers. The results show that D-phenylalanine extends the analgesic effect of acupuncture analgesia remarkably, with no exception in 3 cases. According to these facts, we believe that these findings have an important meaning for those who are engaged in acupuncture treatment or research.