We assume they are safe. But in fact, many popular household cleaners are dangerously toxic. Learn about the eight scariest substances hiding under your kitchen sink, and how to replace them with safer, more natural options that really work. When a pain in Beth Greer’s shoulder led her to a chiropractor nine years ago, she wasn’t that worried. After all, she led a healthy lifestyle: She watched her weight, meditated regularly, and ate mostly organic food. Greer’s chiropractor wasn’t worried either; he diagnosed her with a herniated disk. But after three sessions, not only was she not better, the pain was beginning to radiate down her arm and into her fingers.