Hong Kong authorities have arrested a 30-year-old woman on suspicion of illegally selling poisons and unregistered pharmaceutical products, after an undercover operation found her offering weight-loss injections online. The Department of Health said on Wednesday that it acted on a tip-off and obtained the anti-obesity medicine through a transaction on an instant messaging app. The product bore a Japanese label and indicated that it contained tirzepatide. According to a photo released by the...