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Tretinoin:
There is evidence from carefully controlled medical trials in large numbers of patients that tretinoin 0.05% cream can improve some of the signs of sun damaged skin. The only adverse effects associated with this treatment are skin irritations and mild peeling.
As a result, many practitioners will recommend the use of tretinoin as part of a skin improvement treatment package.
Hydroquinone:
This can be an effective product for reducing the appearance of areas of discoloured skin if used under the proper guidance of a specialist.