Saw palmetto (Serenoa repens) is a tree that grows up to 10 feet tall with thorn-shaped leaves arranged like a fan. Its ripe fruit is used to make supplements.

Stinging nettle (Urtica dioica) is a plant with pointed leaves and white to yellowish flowers. The root and above ground parts are used for diabetes. The stinging nettle plant is typically 2-4 meters tall. It contains ingredients that might decrease swelling and increase urination. The leaves are sometimes eaten as a cooked vegetable.

Saw palmetto seems to lower the amount of pressure on the tubes that carry urine in males. Saw palmetto also might prevent testosterone from being converted to a more potent form called dihydrotestosterone (DHT). Reduced levels of DHT might help prevent some types of hair loss.

Stinging nettle is most commonly used for diabetes and osteoarthritis. It is also sometimes used for urinary tract infections (UTIs), kidney stones, enlarged prostate, hay fever, and other conditions. Don't confuse stinging nettle (Urtica dioica) with white dead nettle (Lamium album).

People commonly use saw palmetto for symptoms of an enlarged prostate called benign prostatic hypertrophy (BPH). Saw palmetto is also used to prevent complications from prostate surgery and for treating other prostate conditions, male-pattern baldness, sexual dysfunction, and many other purposes.