What does the evidence say about chondroitin as a joint supplement?
Chondroitin sulfate, extracted from sources like bovine or shark cartilage, shows modest benefits in established osteoarthritis but lacks evidence for preventive use. Notably, it may slow joint space narrowing, which is crucial for long-term joint health rather than just symptomatic relief.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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