Most (all?) component manufacturers use lead-free solder these days. Lead alloy solders are harder to come by since they're generally only used by hobbyists who find them easier to work with.
Well that and everything else too. There are any number of toxic chemicals/elements all across that board, from inside the ICs (does any of it vaporize out?) to the plastic PCBs, whatever is in the solder, etc etc. It's hardly meant to be 'food safe'.
