For some reason, the grapefruit has become the “black sheep” of the produce aisle. You’ve likely seen the headlines: articles claiming it’s the “weirdest fruit on the planet” or treating its history as a bizarre anomaly simply because it emerged outside of Asia. Much ado is made of its intense drug interactions or its supposedly “alien” name. And writers love to act like this citrus is an otherworldly oddity. But is the grapefruit actually that strange? While its origin story is fascinating, the truth is far less “weird” and much more grounded in the natural history of citrus hybridization. Let’s peel back the myths and look at why this fruit isn’t the eccentric outlier it’s often made out to be.
Estimated reading time: 15 minutes. In a hurry? You can skip to the FAQ section at the bottom of the page to get quick answers to your questions about the origin of the grapefruit and other details. Don’t forget to bookmark and come back later, though, or you’ll be missing a whole lot of great information!
A detailed piece about the grapefruit on Atlas Obscura does a fantastic job of explaining the history of the fruit while showing that there is nothing particularly strange about it, all the while continuing to insist on its strangeness. This insistence on the oddball nature of the grapefruit is stranger than the fruit! I’d say the durian, which smells like death combined with everything awful, is a bit weirder, to name but one example.
The simple truth is that there is nothing so weird about the grapefruit. The grapefruit is a hybrid citrus fruit. All citrus fruits are native to Asia. This doesn’t mean its origin and history aren’t fascinating, though.
Is the Grapefruit Actually a Cross?
The grapefruit is absolutely a cross between two citrus fruits, the pomelo and the sweet orange. You may read that the grapefruit is highly unusual because it evolved outside of Asia. Both the original fruits come from Asia. So, while the grapefruit hybrid event happened outside of Asia, the fruit did not “evolve” independently of other citrus. There is nothing very strange about two citrus fruits producing a hybrid. In fact, it’s the rule rather than the exception. And there is nothing strange about citrus fruits being planted and cultivated outside of Asia.
Citrus Fruits Hybridize Easily
All citrus trees are native to Asia. It is thought that the common citrus fruits we know today, oranges, tangerines, lemons, and limes, all came from three wild ancestors that grew in Asia: the citron, the mandarin, and the pomelo.
Citrus fruits hybridize very easily through cross-pollination. This happens even between citrus varieties with very different characteristics. So, for example, a citrus tree that bears tiny fruits will happily cross-breed with one that has giant fruits. If you plant two different citrus trees anywhere near each other, they will hybridize and produce something novel. This has happened over thousands of years in Asia and will happen anywhere citrus grows.
While this is not certain, most sources agree that the grapefruit arose from a hybridization event between the pomelo and sweet orange.
The Origin and History of the Grapefruit
The first thing to know about the origin of the grapefruit is that we don’t truly know. There are stories, sure, but no definitive history. As soon as I started researching the history of the fruit, I found it scattered and inconsistent. Even those authors who spent years looking under the table and sofa to find as many missing puzzle pieces as possible have left gaps.
We are fairly certain that the grapefruit did not originate in China, or anywhere near, as mentioned. It also did not come from Europe. There are mentions of the “Shaddock” growing in Jamaica by 1696 and in Barbados by 1707, and mentions of the “Forbidden Fruit” and “Smaller Shaddock” by 1789. The latter two names seem to refer to the grapefruit. 1Sinclair, Walton B.. The Grapefruit: Its Composition, Physiology, and Products. United States, University of California, Division of Agricultural Sciences, 1972.
The Pomelo Ancestor
The pomelo (Citrus maxima or C.grandiss), native to Southeast Asia, is the largest of the citrus fruits and one of the natural ancestors of all known citrus varieties, together with the citron and mandarin. It is an ancestor of several important cultivated citrus varieties. The fruit has a thick green to yellow skin and a light-colored flesh that tastes like a sweeter version of the grapefruit,, although with some of the same bitterness. The white pith is much thicker than the grapefruit and is considered inedible. 2The Cambridge World History of Food. United Kingdom, Cambridge University Press, 2000. It is known as Yòu Zi in Mandarin, Jau in Cantonese, Bưởi in Vietnamese, Limau Abong in Malay, and Suha in Tagalog.
Another name for the pomelo (pummelo) is the Shaddock. This nickname comes from a Captain Shaddock of the East India Company who in 1683 is claimed to have brought seeds to the West Indies, possibly from the Malay Archipelago. The Shaddock or Pomelo is mentioned by Hans Sloane, a contemporary of Shaddock who wrote about it in his 1701 A Voyage to the Islands of Madera, Barbados, Neives, S. Christophers and Jamaica.
In Barbados, the shaddocks surpass those of Jamaica in goodness. The seeds of this was frist brought to Barbados by one Captain Shaddock, Commander of an East India ship, who touc’d at that Island in his Passage to England, and left the seed there.
A 1683 issue of The Kingston Times and Herald also mentioned a delivery of seeds to Jamaica, saying that Captain Shaddock hand-delivered some seeds from an Asian plant or tree to William Jones, who was a planter from the Mandeville (Jamaica) area.
We know little else about the story and the several other names for the “Shaddock” fruit are not helpful. Pomelo (pommel, pummlo, etc) may be Dutch in origin. But, the fruit has also been called pamplemoes in Dutch. Other names are Bali Lemon and Limau Besar. The grapefruit itself was at times called a pomelo.
The Mystery of the “Forbidden Fruit
It is thought that the grapefruit is a result of a hybrid event between the pomelo and the sweet orange. Since the sweet orange is a hybrid of the pomelo and mandarin, this is known as “backcrossed” hybridization and explains why 60% of grapefruit DNA comes from the pomelo.
While it seems fairly certain that the grapefruit was growing on Barbados by the late 1700s. The first recorded mention of the fruit was in 1750 by Griffiths Hughes, the rector of St. Lucy’s parish in Barbados, who called it the “forbidden fruit.” We do not know how long it took for the fruit to spread throughout the islands and begin being cultivated there.
There are different stories about when the grapefruit was introduced to Florida. The most accepted account is that the grapefruit was introduced to Florida by Count Odet Phillipe, a Frenchman who came to Tampa Bay in 1823, bringing seeds of grapefruit and several other citrus fruits from the Bahamas.
Phillippe is said to have given seeds from his grove to many of his friends and even today, many heirloom seedlings in Florida are claimed to have come from this source. Many of today’s varieties of grapefruit arose in Florida and cultivation of the fruit spread from there to other places in the states. 1Laszlo, Pierre. Citrus: A History. United Kingdom, University of Chicago Press, 2008.,2Sinclair, Walton B.. The Grapefruit: Its Composition, Physiology, and Products. United States, University of California, Division of Agricultural Sciences, 1972.
The “Grape” in Grapefruit: Why the Misleading Name?
When the fruit came to be called the grapefruit is not certain but it presumably refers to the fruit’s growing in grapelike clusters. While the fruit is nothing like a grape except for this passing similarity, which is not all that similar in truth, explorers and other observers throughout history have named many fruits based on their superficial appearance. The avocado being called an “Alligator Pear”, for instance.
I would even argue that while the ‘gooseberry’ was not named because of its similarity to a goose, or even because geese eat it, it’s still a fruit that was named for its appearance. The name ultimately comes from the German word Kräuselbeere, which translates to “curled or crimped berries.” That is not exactly a creative name.
Much more interesting from an etymological sense is that “grapefruit” is the ordinary-seeming name for the orange. It is much more uncanny, to my way of thinking, that the name of the fruit entered the English language before we started using the word orange for the color!
The names of most non-basic colors are just a descriptor of the basic color of which they are a shade, like crimson red, jade blue, or hunter green. The color orange, and its namesake, the fruit, stand alone in being a color with no other name that came from a specific object.
While orange is a shade of red, if we say “orange red,” we would be specifying another shade. To me, that makes the name of the orange a lot more interesting than the name of the grapefruit, which is just a case of a lack of creative thought on the name of some namer or other. 1Kastan, David Scott, and Stephen Farthing. “Color or Fruit? On the Unlikely Etymology of ‘Orange.’” Literary Hub, 3 Apr. 2019, lithub.com/color-or-fruit-on-the-unlikely-etymology-of-orange/.
The Science of “Weird”: Why Grapefruit Interacts with Drugs
Grapefruit shares its ability to interact with drugs with its ancestor, the pomelo. The fact that grapefruit juice interacts with many drugs leads folks to believe that something uncanny is happening. How can one food interfere with so many different drugs?
It would be uncanny if grapefruit randomly interacted with so many drugs, but this is not the case. First, grapefruit does not directly interact with drugs. Instead, it binds with a chemical in your gut called CYP3A4. This enzyme reduces the absorption of many drugs by breaking them down or metabolizing them. When chemicals in grapefruit juice bind with these enzymes, they cannot bind to the drug. This more drug enters the body than expected, which can lead to greater side effects, etc.
On the other hand, grapefruit is known to cause the opposite problem with a few drugs, such as fexofenadine. Grapefruit can cause less Fexofenadine, a seasonal allergy med to enter the bloodstream by blocking drug transporters. However, the labels for the drug also advise to not take them with orange juice or apple juice.
While all of this does make grapefruit an unusual case in terms of drug interactions, it is not uncanny, strange, or bewildering. Again, grapefruit does not just so happen to interact with a lot of drugs. It just so happens to interact with a relatively few chemicals in the body, enzymes and transporters. While this may be somewhat unusual, it is not earth-shattering as plant compounds that interact with enzymes or transporters in the body are not uncommon.
Certain flavonoids, tannins, and catechins can interact with certain enzymes, while some flavonoids, alkaloids, terpenoids, phenolic acids, and glucosinolates can bind to and interfere with the activity of transporters, particularly those that affect the absorption, distribution, or elimination of drugs. 2Kang, Joohyun et al. “Plant ABC Transporters.” The Arabidopsis Book vol. 9 (2011): e0153. doi:10.1199/tab.0153,3Grapefruit Juice and Some Drugs Don’t Mix. Food and Drug Administration. July 1, 2021. https://www.fda.gov/consumers/consumer-updates/grapefruit-juice-and-some-drugs-dont-mix
The Verdict: Is the Grapefruit Really That Weird?
When we peel back the layers of sensationalism, the grapefruit emerges not as a botanical anomaly, but as a perfectly logical result of citrus history. Its origins in Barbados and its spontaneous hybridization are par for the course in the world of citrus cultivation. Even its famed drug interactions, while medically significant, are the result of common plant compounds interacting with human enzymes in a predictable way. Ultimately, calling it the “weirdest fruit ever” says more about our penchant for hype than it does about the fruit itself. The grapefruit is simply a fascinating natural hybrid with a story that’s extraordinary enough without the need for manufactured “weirdness”.
The Quite Normal Journey of the Grapefruit
As far as we know, the pomelo was brought from Asia to an island or islands in the West Indies, probably Barbados, sometime in the 1600s. There is nothing unusual about this, as any citrus fruit that occurs outside can only occur if it was brought there from Asia or its ancestors were brought from Asia. At some point, the pomelo was crossbred with the sweet orange, which was also growing in the West Indies on one or more islands. Again, there is nothing unusual about this, as the hybridization of citrus fruits is par for the course and happens readily.
Then, the grapefruit spread to other places, first to Florida, and then later to other states, before spreading to Europe. This too, is not unusual and is how cultivated fruits spread, from one place to another.
From Alligator Pears to Plum Tomatoes: The Naming Myth
The name of the fruit is similar to other fruits that were named according to a passing resemblance to something else. No matter that the grapefruit has nothing to do with grapes. The alligator pears, or avocado, has nothing to do with alligators or pears. Plum tomatoes are certainly not related to plums.
How the Pomelo and Grapefruit Interfere with Drugs
Both the pomelo and its descendant, the grapefruit, are known to interfere with various medications. However, it is a myth that the fruit directly “interacts” with the drugs themselves. Instead, compounds in the fruit bind to an enzyme in the gut called CYP3A4, which normally limits drug absorption. When this enzyme is blocked, the body absorbs significantly more of the medication than intended. In other cases, like with the allergy med Fexofenadine, the fruit blocks drug transporters, actually preventing the medication from entering the bloodstream effectively.
In other words, this is all a lot of fuss about a fairly normal citrus fruit that occurred in the way many citrus fruits occur. It just so happens that it interferes with more than its share of drugs. Once we remove the grapefruit’s origin from the realm of “weirdness” all we have are its drug interactions. Since there are many more fruits with unusual properties, the grapefruit has plenty of competition and would easily lose the “Weirdest Fruit” competition.
There are even other citrus fruits that can easily be claimed to be wider, like the Buddha’s hand or the Finger Lime, both of which are pictured above.
Conclusion
Ultimately, the grapefruit serves as a perfect example of how easily we mistake the “uncommon” for the “uncanny”. From its natural hybridization in Barbados to its superficial, grape-like name, every supposedly “weird” aspect of this fruit has a grounded, botanical explanation. Even its unique ability to block gut enzymes is less an otherworldly anomaly and more a testament to the complex chemistry found across the plant kingdom. While it may have plenty of competition for being the most unusual citrus—standing alongside Buddha’s Hands and Finger Limes—the grapefruit’s true story is one of simple natural history that is fascinating precisely because it is real.
Frequently Asked Questions About the Grapefruit
- Is the grapefruit a naturally occurring fruit? Yes. The grapefruit is a natural hybrid that occurred when the pomelo and the sweet orange cross-pollinated, likely in Barbados during the 1700s.
- Where did the grapefruit actually originate? While its parent fruits are native to Asia, the grapefruit itself first emerged in the West Indies, likely on the island of Barbados, where it was recorded as the “forbidden fruit” in 1750.
- Is the grapefruit a man-made hybrid? No, the grapefruit is a natural hybrid that occurred through the spontaneous cross-pollination of the pomelo and the sweet orange.
- Why is it called a “grapefruit” if it isn’t related to grapes? The name most likely refers to how the fruit grows on the tree in large, heavy clusters that superficially resemble oversized bunches of grapes.
- How does grapefruit interact with medications? Grapefruit contains compounds that bind to the CYP3A4 enzyme in your gut. This enzyme normally breaks down many drugs; when it is blocked, a higher amount of the medication enters your bloodstream than intended.
- Is it true that grapefruit can block some drugs from working? Yes, for certain medications like the allergy drug fexofenadine, grapefruit can have the opposite effect by blocking the transporters that help the drug enter the bloodstream.
- What is the difference between a pomelo and a grapefruit? The pomelo is a natural, non-hybrid ancestor of the grapefruit. It is typically much larger, has a thicker pith, and features a greener skin compared to its grapefruit descendant.
