Today, the market throws up a volley of products to its consumers to choose from. So vast is the range that it becomes absolutely difficult to choose the right type of cosmetic for yourself.
Knowledge has always been a tool. Hence, it is up to you to educate yourself about the various ingredients these cosmetics carry, so that you can read and know the ingredients before you buy a particular product. It is also important for you to know whether you are allergic to any particular ingredient so that you can avoid any product carrying the same.
For instance, algae, which are a common sea product used widely in facial masks and other skin revitalizing products can lead to a minor rash in some individuals. Similarly, nickel has been found to be responsible for setting off skin allergies in quiet a few cases. Even ingredients like Quaternium 15, used in many cosmetics have often caused skin allergies, though of a mild nature.