According to a new study by an environmental nonprofit out of Michigan called The Ecology Center, STORE RECEIPTS could be making you sick. REALLY sick. They tested a bunch of receipts at grocery stores, restaurants, and major retail chains, and they found that because of the thermal printers the stores use, 93% of their receipts tested positive for the chemicals BPA or BPS. Those chemicals have been linked to negative effects on your hormones and your metabolism . . .