Chasser offers you three safety tips: First, choose a well-known brand. There are brands that contract the manufacturing process out-but many companies that do this have significantly less control over the quality of their products. And do your research. If the bottle says "manufactured for," then you can start by calling the contractor for information on raw materials used. And be critical. If the claims on the bottle sound too good to be true, Chasser says, they probably are. Doctor Spaeth advises that you always check with your doctor before taking any vitamin or supplement.
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