We have tried Meriva as well as LEF High Curcumin. Both made us angry too. Vaping did not have this effect. As you suggest, it could be because there is not enough turmeric in there. But we did get benefits, similar to eating a lot of turmeric. There is a subtle difference. The concentrated turmeric supplements kind of "lack" something. Something which we found in the vapor. Something which is in the food, but much stronger and more available I suppose. Please consider that I only described our experiment and do not advocate in any way vaping turmeric!!!!! Meriva does not put much turmeric in their product? Maybe it is a good idea. I found too much concentration like in LEF is too much for us. Maybe it is all about the curcuminoids.