THE SUN IS BAD OR GOOD FOR SKIN?
Supplements for promoting the tan
What happens when we abbronziamo?
Tanning is the way our body defends itself from the sun. When we are struck by the Sun, comes into play melanin, a pigment produced by the body, which is responsible for protecting us from ultraviolet (UV).
5% of the sunlight is reflected, while the rest penetrates the tissues and the light begins to be reflected on the cells. Part of the energy is absorbed by the latter, while the remaining passes to the underlying layers of the epidermis. It is here that he meets the melanocytes, special cells that produce melanin. The melanin is very important for the skin: not only gives the color, but is able to absorb UV radiation and thus can download the energy.
There are two types of melanin: the dark (eumelanin) which characterizes the brown people, and the red (pheomelanin) present in those who have hair that color. While the blonde have both.More melanin is darker, is able to carry out its task: the tan is just the result of this defense.
When you are exposed to the sun, melanocytes produce new pigment within 2 or 3 days and the skin darkens. The tanning effect is immediately visible in the epidermis because there is always a small supply of melanin is ready to act.
The sun is bad for our health?
The relationship between sunlight and health is certainly ambivalent. On the one hand, years of information campaigns have spread in the population awareness of the risks related to the skin tan wild. On the other hand, it is widely used the healing power of the sun against many diseases.
Let harms and benefits of the sun:
DAMAGE
Excessive exposure to UV rays is a risk factor for our health. Let's see why
Promotes the development of cancer of the lining skin (squamous cell carcinomas and basal).
The sun can also be harmful to the eyes, and the effects are the most frequent photokeratitis and photoconjunctivitis. The problems of exposure to the sun, however, may be even more severe, such as eg. cataracts.
Other harmful effects of sun exposure are premature aging of the skin, with progressive loss of elasticity and hydration. Several studies also seem to suggest that prolonged exposure to UV rays can increase the risk of viral, bacterial and fungal infections.
BENEFITS
Numerous studies show the health benefits associated with exposure to the sun.
The sun stimulates primarily the body to produce vitamin D, a substance essential for the absorption of the mineral more valuable for bone health: calcium.This vitamin, in fact, is essential for the synthesis of bone tissue and the solar rays stimulate the body to synthesize.
The sun has a healing power even against many diseases of the skin.Among the skin diseases that benefit from the sun remember first of all psoriasis, but also the seborrheic dermatitis and eczema. The same goes for acne. The sun returns a little 'balance to the skin affected by these diseases, but it is essential not to exceed exposure and protecting the skin with appropriate filter.
The sun has also a role in prevention of other diseases, such as cancer in the prostate, breast, colon-rectum and even diabetes.
Are an ongoing series of studies on the role of vitamin D and calcium in the prevention of skin cancer. This mineral strengthens the cell wall, cell membranes and, consequently, the entire skin tissue. The defensive action by tumors is explained by the fact that the skin is not only a casing "passive". Produces cytokines, essential substances that reach the various organs and the skin through which transmits a series of "orders" to the whole organism. It is possible that a proper exposure to the sun can send, thanks to cytokines, the command to keep healthy all the organs, pancreas, stomach, guts, bones. Excessive or poor exposure, however, could not circulate cytokines "wrong", that may damage those organs.
What to do then?
It must therefore be strictly avoid sun exposure? There is no need. Contrast this with the power: you must eat to survive, but if every day you indigestion appear even irreparable damage. The same applies to sun exposure.
Supplements for promoting the tan