Sunscreen expiration dating
Here are some common warning signs that your items have gone bad: If you notice any of these characteristics in any item you have, toss it.
All Mary Kay products carry what is known as a “Date Code.” This is a four-digit code consisting of two letters followed by two numbers.
A shelf life of cosmetics depends on a period after opening and production date. Some cosmetics should be used within a specified period of time after opening due to oxidation and microbiological factors.
According to EU law, the manufacturer has to put the expiration date only on cosmetics whose shelf life is less than 30 months.
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After that, some products start to deteriorate and lose their effectiveness.
Common signs of age are separating, color change, & odor.
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