Metamucil is fiber supplement and bulk producing laxative, with psyllium seed husks used as the active ingredient. The Metamucil company has been producing fiber supplements since 1934, and was owned by G.D. Searle & Company until 1985 when it was acquired by Proctor & Gamble. Metamucil is available in a few different forms - in a capsule, as a powdered drink mix, in multigrain wafers, and fiber singles. The powder is Metamucil's most popular product, and it's available in Orange Smooth and Sugar Free Orange Smooth, Pink Lemonade Smooth, Berry Smooth, and Original Smooth. To top things off, it's also the #1 doctor, pharmacist, and gastroenterologist recommended fiber brand on the market.