Ammonia and smelling salts have long been used by NFL players before and during games to give them an extra pick-me-up whenever they need a boost of energy. This includes any form of smelling salts and ammonia capsules or inhalers.

San Francisco 49ers tight end George Kittle is making a stink about the NFL's recent ban on smelling salts. Kittle interrupted an NFL Network interview at training camp on Tuesday to "air a grievance" about the policy.