The ratios between the obtained dry raw extracts and the dry mass weights typically ranged from 8% to 12% (w/w), in summer and autumn, but could reach as high as 15-16% for both VIETGAP and ORGANIC C. asiatica, depending on the environmental conditions between two harvests (Fig. ). Figure and Table present the contents (mg/g) of AA, MA, and TA in VIETGAP and ORGANIC samples in dry Centella asiatica before the hydrolysisthis means that the triterpenes were occurring naturally as the free acid (aglycone) in C. asiatica. The results in Fig. showed that during June to August 2021 where the air temperature is high and the mean rainfall is low, the content of MA is higher than that of AA and TA. In October, the content of madecassic and asiatic acid are equivalent. In December 2021 and January 2022 (cool air temperature) the madecassic acid starts to decrease in content.