I was very skeptical, but noticed a difference right away. Didn't expect it to, and sure enough, it didn't do much for regular plantar fascitis, which simply needs stretching. But beyond that, the nerves along the bottom of my feet have gotten increasingly sensitive to walking/rucking/running distances. After just taking the sample does for just 5 days, the first 9 miles of a 20 pound ruck were not painful in the same way as prior to taking the sample.
