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  1. www.webmd.com › vitamins › aiHYALURONIC ACID: Overview, Uses, Side Effects, Precautions, ...

    2023年3月23日 · Overview. Hyaluronic acid is a natural substance found in the fluids in the eyes and joints. It acts as a cushion and lubricant in the joints and other tissues. Different forms of hyaluronic acid ...