 When we purchase it, the ratings, the UMF and the MGO all speak to, in my understanding, the strength. But it goes deeper than that as well. I know that when I need the strong stuff, though, I have learned you go to the highest numbers, right? When I feel a cold coming on or I have a sore throat or otherwise, I use it medicinally for that. And I'll tell you, I think it's brilliant.