Hey beauties! I really wanted to write a post about the shelf life of cosmetics and when you should be replacing your favorite products. Below I have a few highlights from a convo I had with a beauty consultant from Benefit Cosmetics. For the most part, I agree with what she said, but always keep in mind, that if your products isn't performing as it normally does, they it's probably time to throw it away (or recycle if it's from MAC). Hope this list is useful for you!
Most skincare products have a small image of an open jar with a number such as "6M". This number is the life of the product after the container is opened, with the M standing for months.
Here are some general cosmetic shelf life lengths:
•Powder: 18 months
•Concealer: 12 months
•Creams & gel cleansers: 12 months
•Eye liner: 18 months, sharpen regularly
•Eyeshadow: 18 months
•Brushes: Wash every month in a mild detergent
•Sponges: Wash weekly & discard monthly
•Foundation: water-based 12 months, oil-based 18 months
•Lip liner: 3 years
•Lipstick: 18 months (If you store lipstick in the refrigerator, it will last longer.)
•Mascara: 4 months (If you don't want your mascara to expire faster than its fresh date, don't pump the wand in & out, you're only exposing the product to drying air.)
So, like I said, I don't agree with every point here, but it's a great guideline to begin with. For instance, I know (just based on my bio background) that you don't really have to throw out an eyeshadow after 18 months because it can last much, much longer than that. A rule of thumb I like to follow is that if it is moist or contains water, then it runs the risk of becoming contaminated. Also, it's smart to disinfect products that you will be sharing. Need further clarification? Just ask! =)