Lifetrends Epilobium (Epilobium parviflorum) also known as small flowered willow herb. Epilobium is considered one of THE most important medicinal herbs for men. May inhibit the enzyme testosterone 5 alpha reductase and aromatase, which are involved in the etiology of Benign prostatic hyperplasia or BPH. Scientists have isolated compounds known as oenotheins from the epilobium species which have shown them to inhibit the enzymes aromatase and 5-alpha-reductase, both of which are involved in prostate enlargement. Each Capsule contains a herbal extract of Epilobium parviflorum equivalent to 650mg. 100 Capsules