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Why do some supplements cost more than others that look like they contain the same ingredients?
Simply looking at the ingredients does not necessarily provide enough information to assess value. For example, the same amount of elemental calcium can be found as, among others, citrate or carbonate, but have significantly different absorption dynamics. Carbonates are much cheaper, and so are often used by supplement manufacturers, even though the more expensive citrates are better absorbed. Frequently, higher quality comes with a higher price.
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