In 2022, the Minnesota Pollution Control Agency (MPCA) reviewed studies on Bisphenol-A (BPA) and Bisphenol-S (BPS) in thermal receipt paper, used for grocery, pharmacy, and restaurant receipts. They cited research showing BPA levels in receipts are 250-1,000 times higher than in canned food, with 54-79 micrograms/cm² in half of 18 tested Minnesota businesses. These chemicals absorb through skin, especially in cashiers handling receipts often.