This product works great and in good combination of herbs that boosts the immune system and a great tonic for the adrenals. Also great as a pre-workout supplement. Like it that this product is in concentrated form and this company doesn't use fillers and flow agent in their supplements. Update: I'm on my third bottle but this time the capsules' content seemed to clump together. I think some mositure had seeped intot the cellulose capsules. I think that's the "downside" of not having fillers and excipient (magnesium stearate), which to me it's fine. I just cut open and dissolve it in hot water (hot water activates the herbs anyway) and drink it. It's bitter but bearable.