DEAR DR. ROACH: A friend recommended hyaluronic acid for joint pain in my wrist and hand. I have been taking 180 mg once a day for a couple months now and have experienced notable success. I also feel that my neck pain and range of motion in my neck have improved. My question is, what exactly is hyaluronic acid? Is it safe, and are there any side effects I should be aware of? -- T.E.
ANSWER: Hyalur…