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Connective tissues are what hold our bodies together and help our joints move freely and comfortably. Without these vital tissues, our bodies simply wouldn’t function properly. L-proline is an amino acid produced by your liver that helps maintain the structure and integrity of vital tissues throughout your body. It is involved in many of the processes that produce connective tissues, and it’s a precursor to hydroxyproline, which is an important part of collagen tissues. Swanson Health Products offers a few economical L-proline supplements for your needs.