In zootomy and dermatology, skin is the largest organ of the
integument system made up of multiple layers of epithelial tissues
that guard underlying muscles and organs. Skin pigmentation (see: human
skin color or coloring) varies among populations, and skin type can
range from dry skin to oily skin.
As the interface with the surroundings, skin plays the most important
role in protecting (the body) against pathogens. Its other main
functions are insulation and temperature regulation, sensation, and
synthesis of vitamin D and the protection of vitamin B folats.
Severely damaged skin will try to heal by forming scar tissue, often
giving rise to discoloration and depigmentation of the skin.
The use of natural or synthetic cosmetics to treat the appearance of the
face and condition of the skin (such as pore control and black head
cleansing) is common among many cultures. Oily skin is caused by
hormonal fluctuations in the body, which lead to a DHT sensitivity. This
sensitivity means that the skin begins to lose moisture and essential
fatty acids (linoleic acid in particular), causing thousands of skin
cells to die, so the skin compensates for this loss of moisture by
producing higher levels of oil. Oily skin can be cleaned quickly with a
mild solution of laundry detergent,[1] when pure bath soaps fail (see
below: Hygiene). Afterward, body lotions could be used to recondition
cleansed skin,[1] as would be used to treat dry skin..
Retin-A
Retin-A is a Vitamin-A derivative used effectively in the treatment of
Acne Vulgaris. Although the exact mechanism of action is unknown, Retin-A,
used as a topical application, is thought to loosen and expel existing
acne plugs in the skin and prevent new lesions from forming. Retin-A
directly attacks the primary cause of acne, the plug.
Renova
Renova (tretinoin cream) is the only prescription cream proven to reduce
certain clinical signs of photodamage associated with chronic sun
exposure and the natural aging process, if used as part of a total skin
care and sun protection program.
Vaniqa
Vaniqa is a prescription medication appied to the skin for the reduction
of unwanted facial hair in women. Vaniqa is the first prescription
therapy cream that is approved by the FDA to eliminate unwanted facial
hair growth.
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