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What are free radicals and antioxidants?

You might have heard the term free radicals being chucked around in the skincare world. But what, exactly, does this mean? Without getting too science-y, they’re unstable atoms that cause damage to our bodily cells. 

Essentially, free radical molecules have an electron missing from their outer shell. Therefore, they’re always on the hunt for other atoms or molecules with which they can pair to make them stable. This process leads to oxidative stress, which weakens cells.