Så vidt jeg kan se efter en hurtig google søgning virker de ihvertfald til mænd

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Vigora enables many men with ED to respond to sexual stimulation. When a man is sexually aroused, the arteries in the penis relax and widen, allowing more blood to flow into the penis. As the arteries in the penis expand and harden, the veins that normally carry blood away from the penis become compressed, restricting the blood flow out of the penis. With more blood flowing in and less flowing out, the penis enlarges, resulting in an erection. Please understand that Vigora is not a hormone or aphrodisiac, it works only when a man is sexually stimulated.