London - Drinking water from plastic cups or bottles could be giving people migraines.
Research shows that a controversial “gender-bending” chemical in synthetic packaging may trigger the attacks.
Bisphenol A (BPA) has already been linked to a range of heath problems including obesity, infertility and heart attacks.
The latest study points to BPA causing the debilitating headaches which afflict one in seven adults in Britain, the journal Toxicological Sciences reports.
The study authors urge sufferers to remove potential sources of contamination, including plastic microwave trays, bottles and office water coolers.