This offer is for our UK customers only. If you bought from us at least twice (I mean directly from this site) in the last 12 months and spent more than $150 USD excluding shipping and purity test kits, you can send your sample and have it tested for free. We will provide you with detailed concentration (mg/ml, %).

Or get a friend (or a few friends) with combined value of purchase of $250 to have one sample tested for free.