Is this the safe MSM brand to take?
http://www.amazon.com/AniMed-389002-Pure-MSM-5lb/dp/B000HHM9WI%3Fpsc%3D1%26SubscriptionId%3DAKIAILSHYYTFIVPWUY6Q%26tag%3Dduckduckgo-d-20%26linkCode%3Dxm2%26camp%3D2025%26creative%3D165953%26creativeASIN%3DB000HHM9WI
