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A flawless, fair and a radiant complexion has always been
desirable amongst Asians for many centuries.
Hyperpigmentation is a very common skin problem which is
particularly prevalent amongst the Asians. Dark patches and spots, called
chloasma or melasma can be quite distressing for some individuals,
particularly in cultures where a fair complexion is valued as a sign of
health or beauty.
Hyperpigmentation may occur due to birth
control pills, pregnancy, hormonal imbalance or any other kind of trauma
e.g. due to reaction from certain drugs and skin injury. Exposure to UVB
light of the sun leads to skin discolouration called solar lentigenes,
also known as sun or age spots.
The result of all the above leads to sight- specific
increased production of melanin. Melanin is a coloured pigment of the skin
and is formed by melanocytes, a process controlled by an enzyme called
Tyrosinase. In order to select the best treatment for this
hyperpigmentation the extent and the depth of the pigmentation should be
studied.
If the hyperpigmentation is in the
epidermis, it can be helped with some skin lightening products. If the
pigment is deeper laser treatments and other combination treatments should
be considered. The treatment hyperpigmentation in Asian skin is
particularly challenging due to the inherent differences of the Asian skin
structure.
Differences in Asian Skin:
- Less wrinkling and sagging due to photo protection by melanin
- Greater numbers of hyperpigmentory spots
- Greater scarring of spots
Science behind Asian Skin:
- Asian skin has a more compact surface layer of skin, stratum corneum
- Asian skin has higher levels of Protease Activated Receptor 2
(PAR2), which signals the production of melanin in the melanocytes.
- Asian skin has larger sized melanosomes which are melanin containing
packets made by melanocytes and taken up by the surface skin cells. The
larger size makes the degradation and dispersal much slower than the
smaller melanosomes found in the white skin.
- Asian skin produces more melanin in response to UVB light than most
white skin
- PAR2 is present on the surface of keratinocytes i.e. keratin
containing skin cells. PAR2 makes the keratinocytes engulf melanosomes
produced by melanocytes thereby giving colour to the skin cells.
SKIN LIGHTENING AGENTS
There are several de-pigmenting agents available but
very little published clinical evidence to support the effectiveness in
some of them:
Kojic Acid Kojic acid is
derived from various fungal species. It is a tyrosinase inhibitor thus
stops the production of melanin. Kojic acid can be used in concentrations
of up to five per cent twice daily as a safe skin lightener. A more
effective alternative is Kojic Dipalmitate which is a key ingredient in
Lightenex by PharmaClinix.
Hydroquinone Although a good
skin lightening agent, it can cause severe skin irritation and can be
potentially carcogenic. For this reason hydroquinone has not been licensed
in the UK unless under a supervision of a doctor.
Tretinoin This is less
effective than Kojic acid and can take far longer before an improvement
can be seen. However it improves the skin cell production, collagen
production and elasticity.
Alpha Hydroxy Acids Alpha
Hydroxy acid peals can remove some skin discolouration. It is quite a
lengthy and traumatic procedure and can only be performed by doctors who
are trained in this field.
Azelaic Acid This is
particularly good for treating acne but has not shown a good result in
skin lightening.
Arbutin This is derived from
plants e.g. bearberry and is used in some; natural skin lightening
products but the results are very poor.
Laser
Treatments Hyperpigmentation deep in the dermis cannot be
treated by creams and more drastic procedures e.g. chemical peals or laser
treatments have to be carried out. Laser treatments are not particularly
suited to the darker skins and the results are not consistent.
Sun Screen A daily use of a
good sun screen of a SPF 25 should be used to allow some natural repair to
occur as well as a protection from further photo damage. Sun exposure is
one of the highest causes of hyper pigmentation and using any kind of skin
lightening or laser treatments without a sun screen are a total waste of
time.
After studying the various cosmetic creams on sale today,
we found that the best results for skin lightening amongst the Asians has
been shown with the use of Lightenex® Skin Lightening programme, by
PharmaClinix®, followed by an effective sun screen eg, Moisturix®
spf25.
The Lightenex® Skin Lightening items include:
Lightenex® Face Mask, Lightenex® Face Scrub, Lightenex®
Face Toner, Lightenex® Face Cream & Eyerix |