Green tea's strong antioxidant activity is due to polyphenols, which give the leaf potential as a cancer preventive. The high intake of green tea in China and Japan is thought to be partly responsible for the low incidence of cancer in these countries.
Damiana has been used as a tea to help overcome the shyness and self-consciousness. A strong nerve and sexual tonic, it's primary use is to help adults overcome sexual "performance anxiety, libido and anorgasmia. Very effective herb and mostly overlooked for other market hyped products.
The primary use of fennel seeds is to relieve bloating, but they also settle stomach pain, stimulate the appetite, and are diuretic and anti-inflammatory