August 13, 2015 5:52 AM EDT

Despite their popular portrayals, foods such as chocolate, oysters and yams do not have any measurable effect on people’s sex drives, according to new findings published in the journal Sexual Medicine Reviews. But these natural substances show promise:

GINKGO BILOBA

The herb is used in Chinese medicine as an extract to treat sexual dysfunction and has led to improvements for men and women in a small trial.

GINSENG

Some studies show the herb is more effective than a placebo in treating erectile dysfunction, but optimal dosing remains unknown.

MACA

A handful of studies have shown that the root vegetable, which is native to Peru, can improve sexual function in healthy women and treat erectile dysfunction in men.

This appears in the August 24, 2015 issue of TIME.

Contact us at editors@time.com.

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