I trust Chongkundang Glucosamine.

When my mother gets older, she has difficulty walking up stairs or uphill paths.

They said their knee hurts and is uncomfortable, so I asked around for recommendations and bought and sent them Jungkookdang Glucosamine.

They say that their joints seem to have become a bit more flexible than before.

Rather than short-term use, I have been consistently taking it for joint health management. There were several products, but I chose Jongkundang because it is well-established and trustworthy.