I bought this because of joint and bone issues. I have a problem with my right knee, and have experienced pain on standing up, and have had to wait to "make sure" before taking a step, after a night's sleep, or after sitting for an extended period of time.
Five or six days after starting a scoop per day of the powder, I noticed a major improvement, and it seems to get even better as I continue the regimen.
As an aside, my facial skin is beginning to feel much different, in a positive way--more supple. or something. I didn't buy the powder for that reason, but I'll definitely take the benefit.