大蕁麻 (NETTLE) 治療掉髮？
Nettle for Thinning Hair
Last Updated: Jan 28, 2015 | By
You often will find stinging nettle in formulations that promise to help with thinning hair. While this herb has a long tradition of medicinal use for numerous ailments, including rheumatism, urinary tract infections and prostate problem, and is approved for such uses by Germany’s regulatory body for herbs called Commission E, its use as a hair-loss aid is still theoretical. This herb can interact with medicines, worsen some medical conditions and have other side effects, so consult a doctor before trying it to alleviate thinning hair.
Both the flowering plant and the root of nettle are used medicinally. Nettle root is approved by Germany’s Commission E for treating prostate problems. This is of interest for hair loss because the herb may work by blocking conversion of testosterone into DHT in your body. DHT is a hormone that shrinks hair follicles and is a factor in male-pattern hair loss. Medications to treat hair loss such as finasteride work by blocking conversion of testosterone into DHT. Another theory is that nettle reduces DHT’s ability to bind to sites where it is active in your body, thus diminishing its effects.
While stinging nettle’s effect on testosterone and DHT, in theory, sounds promising, no clinical studies back the herb for treating hair loss as of 2011, notes Jean Krutmann, author of “Nutrition for Healthy Skin.” Nonetheless, you commonly will find nettle listed as an active ingredient in commercial hair loss formulations, sometimes under its scientific name of Urtica dioica. It is theoretically more effective when used in combination with pygeum or saw palmetto, which also may block DHT.