Pheromones are one of the best-documented phenomena in the animal kingdom and one of the shakiest claims in human fragrance marketing, often in the same sentence. Insects, rodents, and many mammals use pheromones to mark territory, signal danger, and find mates, and the chemistry behind that is well established. Whether humans do anything comparable is a genuinely open scientific question, and thirty years of research on a handful of candidate compounds has produced results that are real, small, inconsistent, and much harder to summarize honestly than most articles on this topic let on.
Here's what the actual studies say, compound by compound, and why the field itself has started questioning its own results.
The 60-second version
Pheromones are confirmed, well-studied chemical signals in animals. In humans, there is no confirmed pheromone, only a handful of "putative" candidate compounds, chiefly androstadienone (found in male sweat) and estratetraenol (its female counterpart), that researchers have tested for decades. Some studies link androstadienone to small, context-dependent effects on mood, attention to emotional cues, and attraction ratings; other studies, including several attempted replications, have failed to find the same effects or found them only under narrow lab conditions. A 2020 Royal Society analysis found that nearly 60 published papers in this field report suspiciously uniform positive results, a pattern consistent with publication bias and false positives rather than a robust real effect. A significant share of people are also unable to smell these compounds at all. The honest answer is that pheromones may have a modest, inconsistent influence on human mood and attraction, but the evidence does not support the strong claims made by "pheromone" fragrance marketing.
That's the whole game. The rest is detail.
What a Pheromone Actually Is
The term was coined in 1959 to describe a substance an organism releases that triggers a specific behavior in another member of the same species, even in tiny amounts. In animals, this is thoroughly documented: pheromones guide moths to mates across long distances, trigger suckling behavior in newborn rabbits, and structure territory marking and alarm signaling across dozens of species.
Humans are a different story. No compound has been confirmed to meet the same rigorous definition in people the way it has in insects and many mammals, which is why researchers consistently use the word "putative", meaning candidate or proposed, rather than confirmed, when describing the human compounds studied so far.
The Compounds Researchers Have Actually Tested
Most human pheromone research centers on a small handful of steroid compounds found in sweat and other bodily secretions, not a general category of "pheromones" as marketing copy often implies.
Androstadienone (AND) is by far the most studied. It's found in male sweat, semen, and axillary skin, and has been linked across various studies to increased attraction ratings, mood changes, cortisol shifts, and activation of brain regions tied to social and emotional processing. It's also the compound most often cited by fragrance brands making pheromone claims.
Androstenone and androstenol, related steroid compounds also found in male body odor, have been tested for similar effects with mixed results, including at least one well-cited study finding no effect on perceived physical attractiveness at all.
Estratetraenol is the compound most often studied as a female counterpart to androstadienone, tested for parallel effects on male perception and mood.
None of these compounds have a detectable smell in the amounts typically tested, which is itself part of why researchers suspect any effect, if real, works through a different pathway than ordinary conscious smell.
What the Research Actually Shows About Attraction
The picture is genuinely mixed, not a clean yes or no. Some studies have found androstadienone increases how attractive people rate photographs of faces, and one widely cited experiment found it increased cooperative behavior between men in economic decision-making games. Other research has found the effects aren't consistently sex-specific in the way early theories predicted, and a comprehensive 2024 review of the androstadienone literature concluded that classifying it as a confirmed human sex pheromone remains inconclusive, citing inconsistent results and a lack of standardized methods across studies.
The androstenol research is a useful counterexample: despite being proposed as a human pheromone for decades, a controlled study specifically testing its effect on perceived physical attractiveness found none, and the researchers pointed to difficulty replicating effects outside narrow lab conditions as part of the problem.
What the Research Actually Shows About Mood
Mood effects are where some of the more consistent, if still modest, findings sit. Multiple studies have found androstadienone can prevent a decline in positive mood under laboratory conditions, and one line of research found this effect depended heavily on context, women's mood improved from exposure to androstadienone specifically when a male experimenter was present, not in isolation. Separate research has linked androstadienone to faster brain processing of the compound compared to an ordinary odor, and to shifts in how strongly people attend to emotional information, including subtle changes in how quickly people notice angry or happy expressions.
What the research does not show is any effect resembling a mood-altering drug. Where effects appear, they're described in the literature as modest, inconsistent across studies, and highly dependent on social context, not the dramatic emotional lift implied by most "pheromone" marketing.
Why This Field Has a Real Replication Problem
This is the part most consumer-facing articles about pheromones skip entirely, and it matters. A 2020 analysis published by the Royal Society reviewed the human chemosignal literature and found that nearly 60 papers testing these putative pheromone compounds report close to uniformly positive results. Statistically, that pattern is a red flag rather than reassurance: research fields with that few null results tend to be affected by publication bias (studies that find nothing don't get published as often) or by false positives that later fail to replicate, a pattern well documented in other areas of behavioral science.
Individual variation adds another layer. A meaningful share of people are effectively unable to smell androstadienone and related compounds at all, a condition researchers call selective anosmia, and the concentration of these compounds on any given person's body varies substantially. A compound that a large chunk of the population can't perceive, at inconsistent concentrations, is a difficult candidate for a universal "attraction chemical" regardless of what any individual study finds.
So, Do Pheromones Influence Attraction and Mood?
Possibly, in a narrow, inconsistent, and heavily context-dependent way, for a small number of specific compounds, under laboratory conditions that don't always hold up outside the lab. That's a genuinely different claim than the one on most pheromone perfume packaging.
What isn't in serious scientific dispute: natural body odor, separate from any single "pheromone" claim, does carry real information that people pick up on unconsciously, including cues related to genetic compatibility and familiarity documented in body-odor preference research. That's a real, if modest, phenomenon. It's also not the same thing as a bottled additive reliably making a wearer more attractive to everyone around them, which is the claim the research doesn't support.
What This Means If You're Looking at "Pheromone" Fragrance
Two related pieces cover the practical side of this. If you're choosing a fragrance and wondering which notes actually read as warm and inviting regardless of the pheromone question, What Are the Best Perfumes for Attracting Others? breaks down what musk, vanilla, and amber actually do. If you're a retailer evaluating whether to stock pheromone-marketed fragrance and what claims are legally safe to repeat in your own listings, Perfumes and Pheromones Wholesale and Retail covers the regulatory line between a cosmetic claim and a drug claim.
What to read next
- What Are the Best Perfumes for Attracting Others? - the fragrance notes with real, documented associations with warmth and closeness.
- Perfumes and Pheromones Wholesale and Retail - the legal line between marketing a fragrance and marketing an unapproved drug claim.
- How to Test Perfume Before Buying - why testing directly on skin, not a paper strip, actually matters for how a scent performs.
About this guide
This overview reflects peer-reviewed research on putative human pheromone compounds, primarily androstadienone and related steroids, as published through 2026, including findings on attraction, mood, attention, and the replication concerns raised in the broader chemosignaling literature. This is an active and unsettled area of research; findings described here may be revised as new studies are published, and individual results vary substantially from person to person.