All LIM WAH THAI's Medicated Oil can penetrate into muscle easily and is made from 100% active ingredients. Every ingredient works as a pain reliever itself. It is proved that the medicinal result of LIM WAH THAI's Medicated Oils are very much effective than other external pain relievers in the current market. In the current market, most external pain relievers contain a large portion of non-active oil base ingredient or filler, such as vaseline, wax etc. Those oil base products have poor penetration and are less effective.