Kaempferia parviflora rhizome is used folk medicines for treatment of various symptoms in Thailand since anticent times.Several types of methoxyflavones has been identified in this plant and their physiological functions have been reported.We determined that six kinds of methoxyflavones (5,7,3',4'-tetramethoxyflavone, 3,5,7,3',4'-pentamethoxyflavone, 5,7-dimethoxyflavone, 5,7,4'-trimethoxyflavone, 3,5,7-trimethoxyflavone, 3,5,7,4'-tetramethoxyflavone) were included in the 80% ethanol extract of K. parviflora rhizome.The safety of six methoxyflavones mixture was evaluated with 28-day repeated oral dose toxicity test in mice.These results indicated no significant toxicity on body weight, blood analyses, organ weight, blood biochemical analyses.

Kaempferia parviflora rhizome is used in traditional folk medicines for the treatments of various symptoms in Thailand since ancient times. Several types of methoxyflavones were identified from that plant and the functions of some of those were reported. We determined that five kinds of methoxyflavones (5-hydroxy-3,7,3’,4’-tetramethoxyflavone, 5-hydroxy-7-methoxyflavone, 5-hydroxy-3,7-dimethoxyflavone, 5-hydroxy-3,7,4’-trimethoxyflavone, 5-hydroxy-7,4’-dimethoxyflavone) were included the following treatments of K. parviflora rhizome. The 80 %ethanol extract of that were adsorbed resin, removed 70 % ethanol elution and the rest adsorbed materials were eluted with 99.5 % ethanol. The safety of that five methoxyflavones mixture was evaluated. We performed a 28-day repeated dose of oral toxicity test and a mouse micronucleus test. The former results showed no significant toxicity on body weight, blood analyses, organ weight, blood biochemical analyses. The latter results showed negative, believed that the sample has no mutagenicity for living bodies.

Bischofia javanica leaf extract exhibited inhibitory activities against hyaluronidase, collagenase, tyrosinase and urease, suggesting that it is useful as an active ingredient for functional foods and cosmeceutical products. In particular, its 50% inhibitory concentration for hyaluronidase was comparable to that of disodium cromoglycate, which is a well-known hyaluronidase inhibitor used as an anti-inflammation and anti-allergy agent. In addition, the extract also inhibited urease with the almost the same potential as acetohydroxamic acid, which is reported to suppress Helicobacter pylori-induced gastritis by inhibiting urease.