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While there’s not a lot of evidence that herbs can actually increase your penis size, some herbs may promote better blood flow and help you achieve stronger erections. To boost your erections, try taking ginkgo in capsule or tea form, since it may help increase blood flow to your penis. You could also take 1 gram of L-arginine supplements 3 times a day, which may help you get an erection after taking it for several weeks. Alternatively, try 500 milligrams of Korean ginseng root per day, which has been shown in one study to improve sexual performance. Remember to consult with your doctor before using any supplements if you are taking medications or have a history of medical disorders, since they can sometimes have negative side effects. If you’d rather try another non-invasive treatment, consider using a penis ring, which fits over your penis and helps retain blood so it stays hard. For tips on how to make your penis look bigger with diet and exercise, read on!