[giantg2]

One thing to be careful about in selecting a supplement is the reputation/testing of the brand since they are loosely regulated. Specifically, how accurate and even are the doses in each batch and capsule? 50 micrograms is small quantity to measure accurately and consistently unless the right equipment and process is followed. There have been a number of supplements and manufacturers over the years who's doses from batch to batch or even capsule to capsule vary wildly.