Many “BPA-free” products have substituted an almost identical chemical to BPA that has its own health-causing effects. The substitute, bisphenol S (BPS) has the basic chemical structure as bisphenol A (BPA).
Evidence is not mounting that the use of BPS is a “bait and switch” scheme designed for promoting products instead of health. As a result, BPS is widely used as a substiture in plastics, thermal cash register paper and other consumer goods.
Now, a new peer-reviewed study published by the National Institute of Environmental Health Sciences indicates that BPS can cause irregular heartbeats in test animals exposed to low levels of the chemical similar to human exposures.
While this is not proof that it can have the same effects in humans, it raises concerns that BPS is not a very good substitute for BPA. More study is needed, but the results are consistent with previous studies done on BPS.
An excellent consumer-oriented article has been written by National Geographic: Chemical in BPA-Free Products Linked to Irregular Heartbeat