Information was pulled from the Herb Quarterly. Here they are:

Echinacea (Echinacea purpurea)
Used by 7 percent of the U.S. (approx 21 million people) to treat colds

Ginseng (panax ginseng)
Used by 4.2 percent of the population (12.6 million) to improve energy, cognition and performance.

Ginkgo (ginkgo Biloba)
Used by 3.7 percent of the population (11 million) to improve thinking and memory

Garlic (allium sativum)
Used by 3.4 percent of the population (10.2 million) as an antibiotic and to reduce the risk of heart disease

St. John’s Wort (hypericum perforatum)
Used by 2.1 percent of the population (6.3 million) to treat depression

Peppermint (menthe piperita)
Used by 2.1 percent of the population (6.3 million) for stomach upset

Ginger (zingiber officianle)
Used by 1.8 percent of the population (5.4 million) for nausea, motion sickness and morning sickness

Soy (glycine max)
Used by 1.7 percent of the population (5.1 million) for hot flashes and cholesterol control

Chamomile (matricaria recutita)
Used by 1.5 percent of the population (4.5 million) for anxiety, stomach upset, insomnia

Kava (piper methysticum)
Used by 1.2 percent of the population (3.6 million) for anxiety