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Tuesday, June 16, 2009
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Sunday, September 21, 2008
How Do Moisturizers Work?
Traditionally, moisturization was believed to inhibit water loss. Water originates in the deeper skin layers and moves upward to the cells in the stratum corneum, eventually being lost to evaporation. Occlusive moisturization then, prevents the dehydration of the stratum corneum.
Much more is now known about the epidermis, and in particular, the stratum corneum. Dry skin is noted when the moisture content is less than 10%, and there is loss of continuity of the stratum corneum.
Scientifically, the moisturizing treatment involves a 4-step process:
Repairing the skin barrier
Increasing water content
Reducing water loss
Restoring the skin’s ability to attract, hold and redistribute water
Class
How does it Work?
Example ingredient
What is it used for?
Possible side effects
I. Occlusive
It Physically blocks water loss
Petrolatun
Lanolin
Mineral
Oil
Zinc Oxide
Xerosis
Atopic dermatitis
Prevention of irritant contact dermatitis
Messy
Some can cause folliculitis (mineral oil)
May cause pimples
Some may cause contact dermatitis (lanolin)
II. Humectants
Attracts water to the stratum corneum
Glycerin
Sorbitol
Urea
Alphahydroxy acids
Sugars
Xerosis
Ichthyosis
Skin rejuvenation
Some may cause irritation (urea, lactic acid)
III. Emollients
Smoothes skin by filling the spaces between skin flakes, with droplets of oil
Cholesterol
Squalene
Fatty Acids
Reduces skin roughness
They’re not always effective
IV. Rejuvenators
They claim rejuvenate the skin by replenishing essential proteins
Collagen
Keratin
Elastin
Skin rejuvenation
Unlikely to work because the protein molecules are too large to cross the epidermis
Some may cause contact dermatitis
Traditionally, moisturization was believed to inhibit water loss. Water originates in the deeper skin layers and moves upward to the cells in the stratum corneum, eventually being lost to evaporation. Occlusive moisturization then, prevents the dehydration of the stratum corneum.
Much more is now known about the epidermis, and in particular, the stratum corneum. Dry skin is noted when the moisture content is less than 10%, and there is loss of continuity of the stratum corneum.
Scientifically, the moisturizing treatment involves a 4-step process:
Repairing the skin barrier
Increasing water content
Reducing water loss
Restoring the skin’s ability to attract, hold and redistribute water
Class
How does it Work?
Example ingredient
What is it used for?
Possible side effects
I. Occlusive
It Physically blocks water loss
Petrolatun
Lanolin
Mineral
Oil
Zinc Oxide
Xerosis
Atopic dermatitis
Prevention of irritant contact dermatitis
Messy
Some can cause folliculitis (mineral oil)
May cause pimples
Some may cause contact dermatitis (lanolin)
II. Humectants
Attracts water to the stratum corneum
Glycerin
Sorbitol
Urea
Alphahydroxy acids
Sugars
Xerosis
Ichthyosis
Skin rejuvenation
Some may cause irritation (urea, lactic acid)
III. Emollients
Smoothes skin by filling the spaces between skin flakes, with droplets of oil
Cholesterol
Squalene
Fatty Acids
Reduces skin roughness
They’re not always effective
IV. Rejuvenators
They claim rejuvenate the skin by replenishing essential proteins
Collagen
Keratin
Elastin
Skin rejuvenation
Unlikely to work because the protein molecules are too large to cross the epidermis
Some may cause contact dermatitis
Tuesday, July 15, 2008
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Skin Care: Sun Damage
An Overview Of Sun DamageSun damage of the skin, also known as photo damage can be either acute, as in a sunburn or more commonly, chronic, seen as gradual changes in the skin caused by an accumulation of sun exposure throughout one's life. Chronic photo damage results in either a cosmetic change in the skin's appearance called photo aging, or changes that are of medical and health concerns such as pre-cancerous lesions and skin cancers. The evidence is very strong that ultra-violet light is the cause of most of the changes that we consider to be associated with aging of the skin.
What Does Sun Damaged Skin Look Like?Fine and coarse wrinkles are seen on sun damaged skin. There is a roughness to the skin and a laxity or looseness in advanced damage, patchy or mottled darker patches of increased pigmentation are seen also. Sometimes these patches become irregular and produce what are known as lentigos. In areas around the back of the neck a leathery texture and coarseness with deep lines is frequently seen, the skin may feel dry and scaly. Chronic sun exposure will in many produce a thickened layer in the upper dermis known as solar elastosis, which gives a yellowish chicken skin look.
Protecting Your Skin From Sun DamageSun avoidance and regular sunscreen use are widely promoted by organizations and individuals interested in skin cancer prevention. A sunburn is caused by exposing your skin to too much ultraviolet (UV) light from the sun, that is, lightwaves that measure approximately 200-400nm.Questions answered about how much sunscreen to apply and how often, what is SPF?, the sun and cancer as well as sunscreen use for childdren and the elderly.Sun damage or photo damage produces both skin cancers as well as photo-aging ...
Treatment For Sun Damaged SkinThere are a number of products and treatments available to try to reverse some of the signs of sun damage. The use of products containing alpha hydroxy acids such as glycolic acid and lactic acid may have a smoothing effect on the skin. We also know that vitamin C preparations will also have modest effects on reversing the appearance of sun damage
What Is Rosacea?
Rosacea is a long lasting, non-scarring skin condition of the face that is often misdiagnosed as adult acne. It varies in severity and does not always worsen with time. Typically, you will experience inappropriate facial flushing that is not usually associated with sweating and/or persistent redness of the face. It is common to have broken blood vessels (telangiectasias) on your cheeks. You may also experience bouts of inflammation that cause red papules (small bumps) or pustules. However, comedones (blackheads and whiteheads) are not part of rosacea.
Acne - What is It
Acne - Basics Facts Acne is the most common skin disorder seen by doctors. In fact, it will affect almost every one of us at some time in our lives. It can happen at any time, but teenagers are the ones who get it most often. Acne can cause a great deal of embarrassment and anxiety. If it’s really bad it can cause people to become depressed which can lead to withdrawing from friends, and perform poorly at school or work.
What Causes Acne?The exact cause of acne is not known, but the following factors are considered important: When the skin surface and its pores are blocked, the pores are described as being occluded. Factors that may cause occlusion include certain cosmetics, oils, greases, and hairsprays. Hats, helmets and pads used in sports may also contribute to this problem as can humidity, sweating and the prolonged effect of contact with damp clothing...
Acne Myths And Misconceptions What do you really know about acne? Do you know what contributes to the cause of acne? Do you know what you can do to treat it?
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