I check the distributors web site and there it states the content as 300mcg. So yes this is an error on the label.
I will contact the distributor and make sure that they correct this on future labels.
For a correct listing of the ingredients check out the following article:
http://www.hairboutique.com/tips/tip237.htm">http://www.hairboutique.com/tips/tip237.htm
Jeffrey Hines
The Hair Boutique