Roasted, pickled, or shredded raw into a salad, beets tend to produce one of two very different reactions. Some people taste a pleasant, earthy sweetness. Others taste something much closer to a literal mouthful of garden soil, and no amount of clever preparation seems to fix it. If you fall into the second camp, you’re not being dramatic. There’s a specific compound responsible, and your ability to detect it in tiny, almost imperceptible amounts comes down to genetics.
The compound is called geosmin, and it happens to be one of the most powerfully detectable smells known to humans, which is exactly why such a small amount in a beet can dominate the entire flavor experience for some people while barely registering for others.
What Causes the Dirt Taste in Beets
Geosmin is produced naturally by certain soil bacteria and is actually responsible for that distinctive “earthy” smell you notice after rain, sometimes called petrichor. Beets absorb trace amounts of geosmin as they grow underground, which carries through into their flavor. Humans are remarkably sensitive to geosmin in general, capable of detecting it at concentrations as low as parts per trillion, making it one of the most potent odor compounds our noses can pick up. But sensitivity to geosmin isn’t uniform across the population, and that variation is where genetics comes in.
Olfactory Receptor Sensitivity to Geosmin
Differences in specific olfactory receptor genes affect how strongly your nose responds to geosmin. People with more sensitive receptors experience even the trace amounts found in beets as an overwhelming, dirt-forward flavor that dominates everything else on the plate. People with less sensitive receptors may pick up on the beet’s natural sweetness and earthiness in a much more balanced, pleasant way, since the geosmin isn’t shouting over everything else.
How Common Is Geosmin Sensitivity
Because humans as a species are unusually sensitive to geosmin overall compared to many other odor compounds, a noticeable subset of people report a strong dirt-like reaction to beets, even at typical serving concentrations. Exact figures on what percentage of people find beets objectionably earthy specifically aren’t as well documented as some other taste and smell traits, but beets consistently rank among the more polarizing vegetables in food preference research, alongside foods like cilantro and Brussels sprouts.
Does This Affect Your Health
Your sensitivity to geosmin has no health implications. It’s purely a matter of taste and smell perception, and there’s nothing about a strong or weak reaction to the compound that reflects anything about your overall health or diet quality.
What This Means for You
If you’ve spent years being told beets are “delicious once you get past the dirt taste,” but that dirt taste never seems to fade no matter how many times you try, your nose may simply be more attuned to geosmin than the people encouraging you to give it another shot. If you’re curious about your own sensitivity to this and other specific compounds, a DNA-based report can offer a genuinely satisfying explanation for a lifelong food opinion.
Frequently Asked Questions
Can Cooking Beets Reduce the Dirt Taste?
To some degree. Roasting tends to bring out more of the beet’s natural sugars, which can help balance the earthy notes, while pairing beets with acidic ingredients like vinegar or citrus can also help mask geosmin’s impact. Highly sensitive tasters may still notice it regardless of preparation.
Is Geosmin Only Found in Beets?
No, geosmin shows up in a range of foods and situations, including certain freshwater fish, some wines, and it’s also the compound largely responsible for the smell of rain hitting dry soil. Anyone highly sensitive to geosmin may notice its presence across several unrelated foods and experiences.
Why Are Humans So Sensitive to Geosmin in General?
Researchers believe humans evolved to detect geosmin at extraordinarily low concentrations because it may have historically signaled the presence of water sources or spoiled food, making strong sensitivity to it a useful survival trait, even if today it mostly just shows up as an opinion about root vegetables.
Does Beet Color Affect How Strong the Dirt Taste Is?
Different beet varieties, including golden and white beets alongside the more common red variety, can have somewhat different geosmin levels and overall flavor profiles, so trying a different variety is sometimes worth it if you’re geosmin-sensitive.
Can I Become Less Sensitive to Geosmin Over Time?
There’s limited research specifically on whether repeated exposure meaningfully reduces geosmin sensitivity the way it can for some other compounds. Most evidence suggests this particular sensitivity stays fairly stable, since it’s rooted in a genuinely powerful, evolutionarily tuned detection system.
If beets have never once tasted anything but earthy to you, that’s not a failure of taste buds. It’s an unusually sharp nose picking up a signal most people barely notice, and there’s something almost impressive about that.