Rice bran in cosmetology
Rice bran is a rich source of biologically
active compounds, including ferulic acid, gamma-oryzanol and phytic acid. Cream and gel, containing extracts of purified rice
bran, was tested on the skin of 30 volunteers. The effect could be seen after 4 weeks of using the products –
the skin looked brighter, smoother and became firmer.
new antiinflammatory peptidesKorean
scientists have identified two dipeptides, able to reduce inflammation, caused by UV radiation. They are leucine-glutamic
acid and methionine tryptophan, having amino acid sequence. Both peptides easily penetrate into the skin and non-toxic. Abdominal
skin of volunteers was exposed to a dose of UVB radiation, which caused erythema. One of the peptides in the form of
2% solution was applied on one side of the abdominal skin. Both peptides significantly reduced the skin redness, that indicated
their ability to suppress the production of substances, causing inflammation.
Resveratrol and cells-self-killersResveratrol-biologically-active substance of polyphenolic nature contained
in grapes, blueberries, cranberries and some other berries. It is a popular food additive and is widely used in cosmetics
to protect the skin from the damaging effects of free radicals. Recently, there was found a new unexpected property of resveratrol.
It turned out that if apply resveratrol to skin and after that irradiate the skin with UVA radiation, in many
cells begins the process of programmed death – apoptosis. Since apoptosis is a natural process by which the skin gets
rid of damaged cells, resveratrol can help to prevent the formation of UV-induced skin tumors.
Hyaluronic acid and retinal aldehyde against skin agingRetinal aldehyde and low molecular weight
hyaluronic acid (50-400kDa) are known in cosmetics as skin anti-aging ingredients. Recently, their effectiveness has been
studied in a large-scale clinical study, which involved 1,492 volunteers. All the participants were divided into three
groups. One group used a day cream with 0.05% retinal aldehyde, the other – a cream with 0.5% hyaluronic acid, and the
third group used both products. The experiment lasted 90 days and the skin condition was evaluated by three groups of
dermatologists. As a result, the skin condition has improved in all three groups, but the most significant decrease in the
depth of wrinkles on the forehead, around the eyes, around the lips and nasolabial area was found in the second and third
groups (group using the products with hyaluronic acid, and the group, using both products). The overall decrease in the symptoms
of photoaging was most pronounced in the third group. The authors have come to the conclusion, that combination of a low molecular
weight hyaluronic acid with retinal aldehyde is the most effective in combating the signs of photoaging.