I didn't notice anything, but not everybody notices things, I've tried many supplements as well and sometimes I notice things and sometimes not. The recommended 1 tsp is very slight flavor but does get you more servings. Perhaps stronger tea/fewer servings would work better.
But I was frustrated that they took a week to ship my tiny order in an envelope. Then USPS took a week once shipped to deliver (not sure if there is a better option, no natural disasters or bad weather in between them and me so shouldn't take that long to go OR-CA-AZ ) Company warned might be delays due to weather but that was all in the east and the southeast at the time - however even if there was a knockon effect from the other side of the country, then take up the slack and ship in a day or two not a week.
First time customer, so not sure if I will continue to order from them.
Albeit pricey, it's organic and has a variety of herbs, so I will still give it 3 stars.