2.2. Centella asiatica preparation
A standardized extract of Centella asiatica was prepared by
the Center for Research and Development of Herbal Health
Product, Faculty of Pharmaceutical Sciences, Khon Kaen University.
All Centella asiatica used in this study was obtained
from Tambon Sila, Khon Kaen Province. The plantwas authenticated
and kept as voucher specimen at Faculty of Pharmaceutical
Sciences, Khon Kaen University. Standardization and conformity
of the extract is assured by strict in-process controls during
manufacture and complete analytical control of the resulting
dry extract. A-day capsule contained a specialized aerial part
extract containing total phenolic content equivalent to tannic