86 Percent of Teens Are Loaded With Gender-Bending ChemicalsBisphenol-A (BPA) was first created by a Russian chemist in 1891, but wasn't used in the manufacture of products until the 1950s when it was used to produce resilient and often transparent plastics. Today, BPA is found in countless personal care products, water bottles, cashier receipts and the lining of canned goods. Although research shows BPA is detrimental to human health, the market was valued at over $13 billion in 2013 and expected to reach $20 billion in 2020. Unfortunately, as the demand for BPA-free products is rising, substitute chemicals that are nearly identical to BPA are being substituted and thought to produce the same negative human health effects. Recently, a study from the University of Exeter determined the extent to which BPA is found in the human population. The study was a collaborative research project between community-based resources (high school students) and the University of Exeter researchers. The study tested the urine and blood of 94 students in Great Britain and found 86 percent of the teenagers had hormone-disrupting contaminants in their system. Although currently legal in Europe, the European Chemicals Agency reclassified BPA in 2017 as a substance of "very high concern" as it has probable serious effects on human health.