I picked up a new shade of MAC lipstick yesterday (OK, the color is 'photo' if you must know the shade) at the mall and as I was looking at the label (don't all Peanut Allergy moms read every single, dingle label??!) I noticed that this color contains Sesame Oil.
So, if you, or anyone you smooch, has a sesame allergy you should probably avoid it. Not sure if all MAC shades contain the same ingredients? Thank goodness B isn't allergic to sesame - not sure if I could live without my MAC (yeah, you're right, I probably would be fine).
And don't forget to check your other makeup products before you buy them, just in case. Nut oils (and in this case sesame oil) can be in all sorts of things.