A:
The sun is essential to nature and to us as human beings. Sun means life, warmth and light. But too much sunlight can damage our skin. The UV rays can cause our skin to age prematurely and may cause a serious health risk. The UV radiation component of sunlight is small but biologically important, consisting of UV-C, UV-B & UV-A.
UV-C is completely absorbed by the ozone in the atmosphere and does not penetrate the ground level, so the solar UV radiation that reaches us consists only of UV-B and UV-A.
Despite the fact that UV-B rays account for a small proportion of the total solar UV radiation, they can penetrate our skin layers, causing sunburns, photo-ageing, and even skin cancer. However, UV-B rays have positive influence on the vitamin D-synthesis, which contributes in formation of human bones. On the other hand, UV-A rays penetrate the lower skin layers and accelerate the premature skin-ageing.
A:
It is preferable not to expose yourself to sun lights between 11:00 and 16:00, especially if you are leaving in the Arabian Gulf countries, and to drink continuously water.
A:
Recent researches demonstrate that Vitamin C must be at low pH and preferable in the form of L-Ascorbic Acid to penetrate into the skin or packed with Liposomes and Nanoparticles.
These researches showed that Vitamin C stimulates collagen synthesis, protects against harmful sunlight radiation, and possesses an Anti-Oxidant effect for skin protection.
A:
Liposomes are the smallest Soya Lecithin balls. They have similar membrane structure as the skin cells, and are responsible to build up the moisture deposit within the skin.
Moreover, nanoparticles are microscopic small balls, much smaller than liposomes. They have relatively simple membrane structure, and are responsible to import oil soluble substances, such as Vitamin A, into the skin.
