| I should start off knowing your age, sex, and relationship status. This plays an important role in hormones and sexual desire. Also, are you taking any medications as medications tend to decrease sexual arousal.
With that being said, Vitamin E does not play a role whatsoever in desire. Vitamin E deficiency is rare, however an excess of Vitamin E can cause hypertension (high blood pressure) so you should stay away from Vitamin E unless your doctor as tested and found a deficiency.
Zinc is involved in digestion, respiration, and bone and liver metabolism. It is also necessary for normal healing and maintaining the integrity of the skin. Therefore, it does not come into play when discussing sexual desire.
Damiana has been used as an aphrodisiac, but only in rats. There have been no clinical studies on humans at this point. So, it would be safe to stay away from any herbal supplement that has not been in any clinical studies with humans as we do not know how this can affect us.
Here is the info on Gingko:
Ginkgo leaves have been used for improving blood flow, memory loss due to certain brain problems (e.g., Alzheimer's disease, stroke), as well as for relieving dizziness, and for ringing in the ears. (medscape.com)
You must consider diet and exercise as well as drug or alcohol intake also. | 
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