Updated

We're approaching Valentine's Day, and people's thoughts turn to love and romance. To crank up the love temperature a bit, here are ten treasures from nature that will take your sex drive and overall fulfillment to a higher level of vitality. Yes, they really do work.

1: Tongkat ali

Viagra

2: Rhodiola rosea

3: Pausinystalia yohimbe

high blood pressure

4: Horny Goat Weed

5: Ashwagandha

6: Catuaba

7: Zallouh

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8: Maca

9: Red Panax Ginseng

This plants' roots are long-heralded treasures of traditional Chinese medicine, to boost overall vitality, bolster the immune system, strengthen sexual vigor and improve sexual function. And at least two human studies show that 900 mg of red ginseng daily significantly improves the symptoms of erectile dysfunction.

10: Cacao (Chocolate)

- Source: "Hot Plants" by Chris Kilham

Chris Kilham is a medicine hunter who researches natural remedies all over the world, from the Amazon to Siberia. He teaches ethnobotany at the University of Massachusetts Amherst, where he is Explorer In Residence. Chris advises herbal, cosmetic and pharmaceutical companies and is a regular guest on radio and TV programs worldwide. His field research is largely sponsored by Naturex of Avignon, France. Read more at www.MedicineHunter.com