I recommend Jongkundang Joint Nutritional Supplement Jaguanwon.

This is a joint supplement made by Jongkundang, the number one pharmaceutical company in Korea. It is in a liquid form for quick absorption. I bought it for my parents, and they said it was good and satisfactory. It contains 2,000mg of MSM, a functional ingredient for joints, which is the maximum daily intake approved by the Korea Food & Drug Administration. Moreover, it is produced through a unique four-step distillation process to minimize impurities, containing 98% pure premium MSM, which seems beneficial for joints and health. Additionally, it includes 500mg of N-Acetylglucosamine, a functional ingredient that must be ingested externally, extracted from domestic snow crab shells.

If you're worried about joint and cartilage health, be sure to try it.