7/30/2019 Oily Skin - Java Tea

1/1

An extract from the leaves of Java tea

plant may help reduce oily skinBy Katie Bird , 30-Nov-2010

Related topics:

Applying an extract from the leaves ofOrthosiphon stamineus, otherwise known as Javatea or Cats whiskers, can help reduce sebum production in the skin, reducing

shine and decreasing pore size, claim BASF scientists.The extract acts on the 5 alpha reductase enzyme that is known to control to a large extent thesebum secretion of the skin, explained the researchers in a paper published in the InternationalJournal of Cosmetic Science.

According to the study, the extract at 2 percent outperformed 1 per cent zinc gluconate, aningredient traditionally used to try to control sebum production, when tested on two groups of 25

subjects in France and two groups of 20 subjects in Thailand.

Explaining the choice of zinc gluconate at 1 per cent, study author Boris Vogelgesang toldCosmeticsDesign.com USA: Problems of solubility and stability in the formula can occur forconcentrations higher than 1 per cent. Thus, 1 percent is probably a common and efficient

concentration for zinc gluconate in cosmetic skin care formulations.

Subjects applied formulations with either the extract or zinc gluconate twice daily on the whole face

for a month, in a double blind study.

Instrumental measurements investigating the shine effect, as well as clinical and self evaluations,

were performed in order to assess the relative efficacy of each ingredient.

Reduced shiny appearance

According to the scientists, the extract, which is marketed by BASF under the name Mat-XS Bright,reduced significantly the return of the shiny appearance after washing, as measured by an imagingsystem looking at the mirror like effect of the skin.

In addition, clinical evaluation showed a reduction in the shiny appearance of the skin and the

visible pore size. Self evaluation also highlighted efficacy, with Caucasian volunteers stating

improvements in complexion, evenness and radiance and Asian volunteers seeing improvements inskin shininess after 14 days.

According to the study, although those using zinc gluconate also experienced some improvementsfor a large majority of the items evaluated, whether instrumentally or by clinical evaluation or byself assessment, results obtained with Orthosiphon stamineus leaf extract were directionally better.

Regarding the results, the scientists were quick to point out that although 5 alpha reductase isknown to play a large role in controlling sebum production, climatic factors such as temperature and

humidity as well as food also have a strong effect on the oily appearance of the skin.

Source: International Journal of Cosmetic Science

doi: 10.0000/j.1468-2494.2010.00581.xOn the effects of a plant extract oforthosiphon stamineus on sebum-related skin imperfectionsB. Vogelgesang, N. Abdul-Malak, C. Reymermier, C. Altobelli and J. Saget

http://www.cosmeticsdesign.com/content/search?SearchText=BASF&FromNewshttp://www.cosmeticsdesign.com/content/search?SearchText=BASF&FromNews