As the skin is very sophisticated, there are some very simple but very important concepts that needs to be understood before buying skin care products. Remember that our skin is an advanced body working 24 hours every day for your entire life to take care of itself in the most beneficial state possible. While they may be to work against your (cosmetic) desires when the software creates rashes, acne, hyperpigmentation, redness or whatever, it is definitely, in fact, doing its best to try and do a