An aphrodisiac is any substance, food, or drink believed to increase sexual desire, arousal, or performance. The word comes from Aphrodite, the ancient Greek goddess of love, and humans have been searching for these substances for thousands of years. Some have a small amount of scientific support, many rely entirely on placebo and tradition, and a few are genuinely dangerous.
Why Humans Have Always Sought Them
The search for aphrodisiacs is older than recorded history. Ancient cultures often chose substances based on appearance: rhinoceros horn, for instance, was prized not for any chemical property but because it physically resembled male genitalia. Seafoods became associated with desire partly because of Aphrodite’s mythological birth from the sea. Chocolate gained its reputation in part because it was rare and expensive, making it a tool of courtship. Even vanilla has sexual roots in its name, derived from the Spanish word for “sheath,” itself borrowed from the Latin “vagina.”
Other traditional choices were based on observable physical effects. Chili peppers cause flushing, sweating, and a racing heart, sensations that mimic arousal. Cantharides, a substance produced by blister beetles (commonly called “Spanish fly”), has been used for millennia because it causes irritation and swelling in the urinary tract, which people mistook for sexual stimulation.
How Sexual Desire Actually Works in the Body
To understand what an aphrodisiac would need to do, it helps to know what drives desire in the first place. Sexual arousal involves a complex chain of brain activity, hormones, and blood flow that no single food can easily replicate.
Dopamine is the central player. Neurons in the brain’s reward system release dopamine in response to sexual cues, whether visual, tactile, or imagined. This creates the feeling of wanting and anticipation. Oxytocin, sometimes called the bonding hormone, amplifies this by activating reward pathways during intimate contact. Serotonin plays a moderating role, and the balance between these chemical messengers largely determines whether desire increases or decreases.
The hypothalamus, a small region making up only about 2% of total brain volume, acts as the control center. It integrates hormonal signals, regulates body temperature, and coordinates the physical changes that accompany arousal: increased heart rate, faster breathing, rising blood pressure, and blood flow to the genitals. Erection in men depends on signals from both the spinal cord and the brain in response to touch, sight, imagination, and even scent. In women, arousal involves similar nervous system pathways controlling blood flow to the clitoris and surrounding tissue. For any substance to genuinely function as an aphrodisiac, it would need to influence one or more of these systems in a meaningful way.
Herbal Supplements With Some Evidence
A handful of plant-based supplements have shown small, measurable effects in clinical trials, though none deliver the dramatic results people tend to hope for.
- Maca: In a placebo-controlled trial, men taking 2,400 mg daily for 12 weeks reported a modest improvement in sexual function scores (1.6 points above baseline, compared to 0.5 points for placebo). Real, but subtle.
- Tribulus terrestris: Men taking 1,500 mg daily for 12 weeks scored 2.7 points higher on a standard erectile function questionnaire than those on placebo.
- Tongkat ali: A clinical trial found a small but statistically significant improvement in sexual function scores, from about 25.4 to 26.8 points.
- L-arginine: An amino acid rather than an herb, it helps the body produce nitric oxide, which relaxes blood vessels. In one trial, 31% of men taking 5 grams daily for two weeks reported improved erections, compared to 12% on placebo.
These numbers are real, but context matters. The improvements are consistently small. Many participants in the placebo groups also reported feeling better, which points to the powerful role of expectation in sexual experience.
Popular “Aphrodisiac” Foods: Mostly Myth
Oysters, chocolate, strawberries, coffee, honey: these are the foods most often called aphrodisiacs in popular culture. The scientific support for any of them is essentially nonexistent. While chocolate contains small amounts of compounds that can influence mood, and oysters are rich in zinc (which supports testosterone production over time), neither has been shown in controlled studies to reliably increase sexual desire or performance.
The reason these foods persist as aphrodisiacs likely has more to do with ritual and psychology than chemistry. Sharing an indulgent meal in an intimate setting creates anticipation, closeness, and sensory pleasure. Those experiences genuinely do influence arousal, but the mechanism is psychological, not pharmacological.
The Power of Placebo
Belief is arguably the most potent aphrodisiac that exists. Sexual desire is deeply tied to expectation, mood, and context. If you believe something will make you feel more aroused, there’s a reasonable chance it will, at least temporarily. This isn’t a weakness of the mind; it reflects how tightly psychological state and sexual response are wired together. The brain’s reward system responds to anticipation itself, releasing dopamine before anything physical even happens.
This is why so many aphrodisiacs “work” for some people despite having no active pharmacological ingredient. It also makes studying aphrodisiacs unusually difficult, since the placebo group in any trial tends to show improvement too.
Substances That Are Genuinely Dangerous
Some traditional aphrodisiacs carry serious health risks. Yohimbe, derived from the bark of an African tree, is one of the most widely sold. Its active compound, yohimbine, has been linked to irregular heartbeat, dangerous blood pressure spikes, heart attacks, and seizures. A review of California Poison Control calls over seven years found reports of rapid heartbeat, anxiety, stomach problems, and hypertension from yohimbe products. Making matters worse, a 2015 analysis of 49 yohimbe supplement brands found that the actual yohimbine content varied wildly from product to product, and most labels didn’t disclose how much they contained.
Spanish fly (cantharides) is even more dangerous. The compound works by severely irritating the urinary and genital tract, which can cause chemical burns, organ damage, and death. It has killed people throughout history and remains toxic at any dose that produces noticeable effects.
What Actually Supports Sexual Health
The most reliable “aphrodisiac” may not be a single substance at all, but a dietary pattern. Research on the Mediterranean diet, rich in vegetables, fruits, fish, nuts, and olive oil, shows consistent benefits for sexual function in both men and women. The MÈDITA trial, a randomized clinical study, found that people following this diet experienced significantly less decline in sexual function over time compared to those on a low-fat diet. A separate study called FERTINUTS found that men who ate 60 grams of mixed nuts daily showed improvements in orgasmic function and sexual desire.
The likely explanation involves blood flow. Plant foods are rich in polyphenols, and fatty fish provides omega-3s. Both help the body produce nitric oxide, the same molecule that relaxes blood vessels and enables genital arousal. This is, in fact, the same basic mechanism behind prescription erectile dysfunction medications. The dietary version is slower and less dramatic, but it supports the underlying vascular health that makes arousal physically possible.
One interesting finding from research on women with type 2 diabetes: those who drank moderate amounts of red wine daily scored higher on measures of sexual desire and overall function than women who drank rarely or not at all. This may reflect the polyphenol content of red wine, the relaxation effect of moderate alcohol, or both.
When Low Desire Becomes a Medical Condition
There’s a difference between wanting a boost in libido and experiencing a persistent, distressing absence of sexual desire. The clinical term is hypoactive sexual desire disorder (HSDD), defined as a significant reduction in desire or motivation to engage in sexual activity that causes personal distress. Key features include reduced spontaneous sexual thoughts, diminished response to erotic cues, and difficulty sustaining interest once sexual activity has started.
Not every dip in desire qualifies. Clinicians look at whether the change is lifelong or acquired after a period of normal function, whether it occurs in all situations or only specific ones, and whether it causes genuine distress rather than simply being a natural fluctuation. Relationship issues, medications (especially antidepressants), and hormonal changes from menopause are common contributing factors that need to be addressed before a diagnosis is made.
For premenopausal women with HSDD, one FDA-approved medication exists. It works by adjusting the balance of brain chemicals involved in desire, increasing dopamine and norepinephrine activity while reducing serotonin’s inhibitory effects. For postmenopausal women, testosterone therapy is sometimes recommended when symptoms are persistent and widespread. Both options require clinical evaluation and aren’t substitutes for addressing underlying causes like stress, medication side effects, or relationship dynamics.