Posted by iHerb Customer on May 31, 2017 | Verified Purchase
I love Thorne Research vitamins (although unfortunately very expensive). My daughter has ADD so decided to try phosphatidylserine. I tried Thorne Research brand first, and found it very helpful to manage her symptoms. I tried to find another cheaper brand that would work as well but unfortunately couldn't. We have now used this brand for 3 years and every time I try to taper off I notice a difference.