Девочки, а я вам рассказывала о гиалуроновую кислоту?Мне на днях рассылка пишла от пептидного доктора. ЧитайтеHyaluronic acidBy Doctor Loren PickartHyaluronic acid (scientifically named 'hyaluronan' ) is a sugar-like molecule that can bind huge amounts of water (1000-fold of its own weight).When applied to the surface of human skin, it may feel smooth and sensuous but will slowly wet the skin's outer protective proteins and damage the skin barrier. This can temporarily improve the look of skin but does not help its long term health. The outer layer of skin (what we actually see) is composed of keratinocytes. The signal that causes the skin to send new keratinocytes to the skin's surface is a dryness in the outer layers of the skin. Hydrating (wetting) the outer skin proteins slows or even stops the normal flow of keratinocytes to the skin surface. If the skin is kept wet, such as with the use of a hyaluronan, renewal is slowed and skin just ends up looking older.Skin damaging cosmetic moisturizers are designed to push water into the skin and wet the outer skin proteins. Various detergents (but they may not be labeled detergents) and water-holding molecules such as hyaluronic acid often loosen the outer skin proteins so water can interact with them. But this weakens the skin barrier and lets in viruses, bacteria, and allergens.In about 1997, there were studies from Denmark that found that oil/water skin moisturizers broke down the skin barrier. The concern was that this could increase infection in hospital patients.This means skin is more slowly replaced and damage remains longer. The best example is the 'cold creams' that women applied every night in the 1930s and 1940s. You may have seen these in old movies. Their skin was kept moist but these women ended up with horrible wrinkles.Various polymers of hyaluronan are used as skin injectable skin fillers. Injectable form of hyaluronic acid are sold as 'not-from-animal' sources but they are derived from pathogenic bacteria. The FDA warns that the material contains small amounts of bacterial protein and this can produce allergic responses in time.Hyaluronic acid in tissues speeds the spread of cancer cells. Anti-cancer therapies are being developed to lower hyaluronic acid in tissue to stop cancer growth.Go the http://www.ncbi.nlm.nih.gov/entrez/query.fcgi and type in 'hyaluronan cancer' and you will get about 1,100 recent references.So our recommendation is to use products free from hyaluronic acid and instead use biological oils as moisturizer agents. These compounds are time tested and work as the most natural way to hydrate skin without potential harmful effects.