7. Smelling Salts
Originally referred to as 'lady revivers' in Victorian times for their ability to wake a fainted woman, smelling salts are now everywhere — gyms, luxury spas, hockey games. Despite their name, smelling salts contain no salt (further pushing them down this list) and are instead made of ammonia that force an inhalation reflex in an unconscious person. Now, they're commonly used like an energy drink before a big game. They can also be used for anxiety relief, with products lining the shelves of spas for their 'uplifting' qualities. A 2006 study ultimately showed that smelling salts had no benefit, and merely delayed the need for athletes to get medical care they needed. Large concentrations of ammonia can also prove deadly, so no need to substitute your pre-workout anytime soon. They're lethal, unproven and contain no salt — we're putting these smelling salts where they belong, right at the bottom of our list.