You can get a free L'Oreal Youth Code by clicking “Special Offers & Savings” in the lower left. You'll then have to create an account, or if you've signed up for a L'Oreal freebie before, log into your account.
I have to admit to being dissapointed. I thought this was an actual code I could type into my computer before downloading the freebie to my body. Isn't that the reason wifi was invented?