https://www.sunshineandherb.com Ive been trying a few differnt combos of herbs in water to help improve focus and concentration. I cam across the mis of ginkgo and ginger and I absolutley LOVE this combo. The ginkgo just opens up circulation so much and the ginger settles the stomach and kills parasites which leaves my belly area so much flatter than usual. I did use gotu kola for a while and it just really completed the process. But the way I use the ginkgo and ginger directly in the water seemed to make a huge difference. I used this combo three weeks on twice a day, and one week off.