BPA Free – What does that mean? BPA stands for Bisphenol A, a chemical added to many commercial products over the last few decades. Recent studies show, however, BPA might not be the wonder chemical we once thought it was. Although it is excellent for building strong and resilient plastics studies, have shown that exposure to this chemical can reduce fertility and affect the hormones of children and pregnant women. It has also been linked to contributing to worse immune function.