Church & Dwight Co. said Monday that it will buy Avid Health Inc. for $650 million to expand into the vitamins business. Church & Dwight, which makes Arm & Hammer baking soda, Aim toothpaste and ...

In 1971, when work began on Aim, the fluoride toothpaste market was dominated by Procter & Gamble's Crest and Colgate's Colgate which between them held 73%. In this fact-filled presentation, Mr.