I like a liquid glucosamine product because it probably absorbs better than pills and you only have to take it once per day. I use the one sold at Costco, Symtec Joint Movement Glucosamine with Chondroitin and MSM. It alleviated most of my knee pain, but also using a glucosamine/chondroitin/msm skin cream on my knees has eliminated ALL of my knee pain for the past 1-1/2 years.