I bought this green lipped mussel for my 8-year-old German Shepherd half month ago. She starts taking it as soon as we get it. She's struggling with running and jumping before then. Even a normal daily walk(say over 50 mins), sometimes she limps. She's now taking green lipped mussel and deer velvet daily. I'm not quite sure which one works. But it looks like she's getting her energy back. She can walk up stairs without too struggling and she even did chasing and running again with her buddy. I'm gratified to see such good results in such short time. Definitely will come back for more.