According to traditional usage of Kaempferia Parviflora,[2] 0.5-1 teaspoon of ground power is made into a tea and drank about 1-2 hours before physical performance. This is similar to the recommended daily dose from the Thai traditional medicine institute of 1.2g daily, and the one human study on the matter (failing to note benefit acutely) used 1.35g.
General health protective effects have been noted at lower doses, although not enough evidence exists to suggest an optimal dose.