In the quiet routines of daily life — the bottled water, the packaged meal, the morning cosmetic ritual — a new Iranian study suggests that ordinary plastics may be leaving an invisible biological signature. Researchers examining 90 premenopausal women found that higher exposure to bisphenol A and phthalates, chemicals woven into the fabric of modern consumer goods, correlated with measurably elevated levels of estrogen and progesterone in the bloodstream. The chemicals were present in virtually every participant, regardless of exposure level, raising a question that extends far beyond any sin