Good Supplement - contains Quercetin
I kind of consider this supplement as a back-up to my other supplements and vitamins because although it contains very good things, it doesn't contain some of them in high enough quantities for me.  For instance, I normally take at least 250mcg D3 10,000 IU) daily, and this supplement only contains 3.3 mcg which is a mere fraction and that requires 2 capsules.  But, I like a lot that it contains 167 mg of quercetin, and 167 mg of elderberry, both extremely important in keeping one's immune system strong and healthy.  Overall, I think this is a very good supplement for the immune system but more D3, C, and zinc should be taken along with this.
Rating: 4 stars