WASHINGTON/NEW YORK (Reuters) - Robert F. Kennedy Jr. vowed to purge the U.S. Food and Drug Administration shortly before being chosen as President-elect Donald Trump's nominee for health secretary.

Hims & Hers Health ( HIMS, Financials) shares slumped 24.5% on Thursday as Amazon ( AMZN, Financials) expanded into hair loss and erectile dysfunction treatment sectors; shares are recovering somewhat ...