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Grapefruit is a big round citrus fruit with a bitter yellow skin and a juicy rather tart pale yellow, pink, or reddish pulp. [1]

Grapefruit History

The Start

America is the world’s largest customer of grapefruit, with large commercial groves in Arizona, California, Florida and Texas. But the grapefruit’s forefather, the pummelo (also pomelo or shaddock), originates from far away– it’s native to Malaysia and Indonesia. Pummelo seeds were brought from the East Indies to the West Indies in 1693 by an English ship commander. The grapefruit may have been a horticultural accident or a purposeful hybridization between the pummelo and the orange. The initial grapefruit was about the size of an orange. It was originally called both “forbidden fruit,” and the “smaller sized shaddock,” after Captain Shaddock, who brought the seeds.

Grapefruit Concerns America

The grapefruit showed up in the U.S. in 1823, but it was not instantly popular; the thick skin was uncommon and an impediment. However the tree prospered, and its name evolved in English based upon how it grows: in grapelike clusters. In 1870, the big, golden clusters on a tree he passed brought in John A. MacDonald, who resided in Orange County, Florida. MacDonald developed the first grapefruit nursery. Florida’s first delivery of grapefruits to New York and Philadelphia, in 1885, generated interest and helped produce the commercial grapefruit industry. By the late 1800s, grapefruit trees were being cultivated in the southern part of Texas; by 1910 grapefruit had prospered in the Rio Grande Valley of Texas, along with in Arizona and California. The pink grapefruit and other varieties were established. In Jamaica, the grapefruit was crossbred with the tangerine to produce the ugli (which is indeed awful), a sweeter fruit that the residents choose. In 1929 a Texas citrus grower found an altered red grapefruit growing on a pink grapefruit tree, which ended up being the Ruby Red cultivar. Clusters growing like grapes made grapefruit its name. Grapefruit has been a home favorite in the U.S. considering that the 1940s. In the U.S., the peak season for grapefruit is October to June; Florida and Texas groves bear fruit beginning in October, and Arizona and California chime in January to June. Since grapefruits are so popular, they are imported in the off-season. Similar to almost all products, commercial growers focus on developing fruits that are bigger, more consistent in size, more attractive color and with less seeds. Sadly, taste is compromised to attain more business homes. The treasure ranges were far tastier than today’s cultivars. If you can find any, get them up. [2]


The grapefruit tree grows to be as big and energetic as an orange tree; a mature tree may be from 4.5 to 6 metres (15 to 20 feet) high. The foliage is really thick, with leaves dark and shiny green and nearly glabrous (without plant hairs). Flowers are big and white, borne singly or in clusters in the axils of the leaves. Most ranges are yellow when ripe. The fruit ranges from 100 to 150 mm (4 to 6 inches) in diameter, its size relying on the range and upon growing conditions. Its pulp is usually light yellow-colored, tender, and really full of juice, with a distinct slightly acid flavour. A number of varieties have pink or red pulp. [3]

Grapefruit Nutrition Facts

One-half grapefruit determining around 3 3/4″ in diameter (123g) supplies 52 calories, 0.9 g of protein, 13.2 g of carbohydrates, and 0.2 g of fat. Grapefruits are an outstanding source of vitamin C and vitamin A. The following nutrition information is supplied by the USDA.1.

  • Calories: 52
  • Fat: 0.2 g
  • Salt: 0mg
  • Carbohydrates: 13.2 g
  • Fiber: 2g
  • Sugars: 8.5 g
  • Protein: 0.9 g
  • Vitamin C: 38.4 mg
  • Vitamin A: 71.3 mcg


There are about 13 grams of carbohydrates in a half grapefruit. The majority of the carbohydrate comes from naturally taking place sugar (8.5 g). There are likewise 2 grams of fiber in a half grapefruit.

The glycemic load of half a grapefruit (with no added sugar or honey) is approximated to be 4.


There is almost no fat in grapefruit. One half of a medium grapefruit has approximately 0.2 g of fat.


There is less than one gram of protein in half a grapefruit.

Vitamins and Minerals

Grapefruit is an exceptional source of vitamin C, supplying nearly 64% of your everyday needs in a single serving. It’s also an exceptional source of beta carotene (which the body transforms to vitamin A), offering 28% of your everyday needs.

Grapefruit offers percentages of specific minerals, such as potassium, calcium, and magnesium. [4]

17 Health Benefits of Grapefruit according to Nutritionists

Grapefruit contains a lot of water

At about 92% water, grapefruit has among the greatest water contents of any fruit. That makes it great for general health.

” All of our body systems and procedure … require water,” Wesley Delbridge, RD, a Phoenix-based dietitian, informs Health. “Proper hydration makes your body more effective in everything you’re doing.”.

About 20% of your day-to-day fluid consumption actually originates from food. So include some grapefruit to get closer to your day-to-day H2O goal and pick the heavier of 2 fruits of equal size: It has more juice.

Grapefruit might speed weight loss

A number of research studies have actually shown that individuals who consume half a fresh grapefruit or beverage grapefruit juice prior to each meal lose more weight than people who do not.

Not all studies have actually shown the exact same weight-loss advantage and researchers don’t know if the impact seen in the studies was particularly due to grapefruit– or filling on a low-calorie food in general– however fruits and vegetables must always become part of your method to lose or keep weight.

What is 100% ironclad truth: Grapefruit delivers a lot of nutrition and water for extremely few calories: there are simply 39 calories in one half of a grapefruit. So it’s a great choice if you wish to increase your consumption of high nutrient, low calorie foods.

Even the pith is good for you

When you peel away the outer layer of a grapefruit, you might be lured to pick off the white flesh that is between you and the juicy fruit, and toss it away. This stuff is called pith. Don’t do it.

” That [pith] is very rich in antioxidants and nutrients and also soluble fiber which is going to help you feel fuller and effect your glucose reactions,” says Delbridge.

While the pith of grapefruit can have more of a bitter taste than state, oranges, it deserves eating in addition to the fruit (if you can). Fiber is a good thing, and can help lower blood glucose, cholesterol, and possibly even colon cancer risk.

Grapefruit can assist lower “bad” cholesterol

A grapefruit a day might help lower “bad” LDL cholesterol levels by as much as 15.5%, according to a 2006 research study in the Journal of Agricultural and Food Chemistry. In the study, researchers looked at 57 clients ages 39 to 72 who had high cholesterol and had actually gone through bypass surgery for heart difficulty. For one month, some consumed a grapefruit everyday (either red or white) while others, the control group, did not. Grapefruit eaters, especially those eating red, had a drop in bad cholesterol, while the control group did not.

This is fantastic news for your heart. LDL cholesterol is a type of fat that can develop in your arteries and raise the danger for cardiac arrest and stroke. But if you are taking a cholesterol-lowering drug, don’t include a grapefruit for extra impact– the FDA issued a caution in 2012 about interactions with such medications.

Grapefruit might help pump up your immune system

That’s because of the hefty dose of vitamins A and C in each serving. “Vitamin C and A are huge as far as immune improving,” says Delbridge.

Some research study indicates that not having enough vitamin C (and other micronutrients) might in fact harm your body immune system, especially if you’re senior.

Grapefruit might not prevent a cold but the vitamins inside might lower your suffering or potentially the period of a cold.

” There’s nothing else you can do for a cold so why not?” says Ann Marie Chiasson, MD, assistant director of the Fellowship in Integrative Medicine at the University Of Arizona College Of Medicine in Tucson.

Grapefruit can lower triglyceride levels

There’s another factor grapefruit can be helpful for your heart: It decreases levels of triglycerides, another type of fat– like “bad” LDL cholesterol– which can rapidly clog up your arteries.

The exact same study that found that adding one grapefruit a day lowered cholesterol levels likewise discovered that this basic everyday routine reduced triglycerides– by as much as 27%. This remained in patients who already had coronary artery illness and so were at high risk for cardiac arrest and other problems.

Grapefruit can decrease high blood pressure

” Grapefruit has got some information that it decreases systolic blood pressure, not by a lot– it’s typically about five points– but there’s absolutely good information,” states Chiasson. And for the 70 million Americans who have high blood pressure, any drop in high blood pressure is a good drop.

The impact on blood pressure might be because of grapefruit’s high potassium levels. Potassium neutralizes the unfavorable effects of salt. (Here are 15 foods that are high in potassium.).

But once again, don’t consume grapefruit if you are already taking a blood-pressure lowering drug. Particular ones, such as Procardia and Adalat CC (both are from the generic nifedipine), can be harmful when integrated with grapefruit, according to the FDA.

The redder, the much better

All the grapefruit colors are packed with goodness, vitamins, and nutrients however the red and pink ones included a little additional.

” They have a greater antioxidant level, specifically beta carotene,” states Delbridge. “They likewise have lycopene, another antioxidant.”.

Lycopene is among a group of carotenoids or pigments that provides hued grapefruit (and other fruits and vegetables) their color. Eating diets rich in carotenoids might decrease the risk of heart problem and some cancers.

Anti-oxidants in general may play a crucial role in preventing cancer.

Grapefruit may assist manage blood glucose

Grapefruit likewise has a low glycemic index (GI), around 25, which means it doesn’t raise blood sugar level as quickly or as much as high-GI foods like white bagel (72) or perhaps a banana (48) or watermelon (72 ). (The greatest GI score is 100.).

A 2006 research study published in the Journal of Medicinal Food, discovered that individuals who ate grapefruit (juice or half a fruit) before a meal had a lower spike in insulin 2 hours behind those taking a placebo, and fresh grapefruit was connected with less insulin resistance. All 91 patients in the 12-week study were obese, but they did not always have type 2 diabetes.

While the outcomes are promising in those without diabetes, blood-sugar reactions to food can differ widely, so if you have been diagnosed with type 2 diabetes, test your blood sugar after eating grapefruit to make sure it can be part of your healthy eating strategy.

The fruit is much better than the juice

Grapefruit juice has plenty of advantages, but the conventional fruit itself is going to offer you more value when it pertains to nutrition and health advantages.

” When you take juice, you’re getting a few of the nutrients however you’re losing all the fiber,” states Delbridge. “Grapefruit juice is great but at the end of the day, the entire fruit has pectin and skin and all the parts of it.”.

Grapefruit juice can also surge your blood sugar level more than the fruit itself. If you choose juice of any kind, Delbridge recommends not drinking more than 6 ounces a day and going just for 100% juice items that don’t have actually sugarcoated.

Grapefruit might speed wound healing

Vitamin C helps form healthy scar tissue and new members vessels, both of which assistance return your body to a healthy state. A grapefruit consists of about 72 mg of vitamin C, which is 120% of the day-to-day worth.

Vitamin C accelerate injury recovery post surgically,” states Chiasson. “I tell people to take 500 milligrams of vitamin C before they enter into surgical treatment.”.

Constantly ask your medical professional before including vitamins, minerals, or any organic supplements to your daily program, particularly if you’re about to have surgery. In this case, that opts for grapefruit too, given its capability to impact the metabolic process of specific drugs.

Grapefruit may even help prevent cancer

A large research study conducted in Japan discovered that people who consumed citrus (including grapefruit) throughout the week had a lower risk of establishing cancer, specifically prostate and pancreatic, compared with the overall group of participants.

The effect was amplified amongst those who likewise consumed a lot green tea.

The authors speculate that compounds in citrus fruits reduce swelling and stop cancer cells from increasing. They may likewise help fix damaged DNA, which contributes to the development of tumors.

The fiber in grapefruit might also assist avoid colorectal cancer while fruits high in vitamin C and beta-carotene, which is in pink and red grapefruit, might reduce the threat of esophageal cancer.

They can be kept in your refrigerator, or on the shelf

Grapefruit can be kept in your refrigerator for as long as three weeks but they release their finest taste when kept at room temperature level. If you plan to consume them within a week, leave them on a counter or table.

There’s an included benefit to keeping them in plain view.

” The increased visibility assists you remind yourself that you require to consume them,” states Delbridge. “Research studies show that when you put vegetables and fruits out in a bowl or typical location of your house, you will eat more.”.

If you do not think you will consume the grapefruit for 2 or 3 weeks, tuck them in the refrigerator however ensure they’re at room temperature level before you actually dig in. This will offer you optimal taste.

You can make a meal out of grapefruit

Grapefruit is most often related to breakfast, however don’t let that limit your imagination.

Grapefruit is also extremely in salads and with fish or chicken. In fact, it’s best when paired with protein and a little fat, like a handful of walnuts.

” If it’s coupled with proteins and fats, it will postpone your gastric emptying so you’ll feel complete longer,” states Delbridge. The fiber, too, keeps you feeling fuller longer.

Grapefruit may have more vitamin A than an orange

Half of one grapefruit consists of 28% of your everyday value of vitamin A (based on a 2000-calorie day-to-day intake), or far more than the 4% in oranges, states Delbridge. This first vitamin in the alphabet benefits your eyes, not to mention your heart, lungs, kidneys and other organs.

What’s more, you also get 64% of your vitamin C, 8% of your fiber, a little bit of calcium (3%) and iron (1%), and you begin to comprehend why it’s called a superfood. (For more contrasts, read “12 Foods That Have More Vitamin C Than an Orange.”) Why consume a half a grapefruit when you can consume a whole one?

You can consume it in beer type

If you find the fruit itself to be too tart, attempt a grapefruit-flavored drink: There are a bevy of products– consisting of grapefruit-flavored beer– that might be more tasty to you.

Due to the fact that citrus sets well with beer, there are plenty of orange and lemon flavored beers, however grapefruit is the a more recent flavor in the brewing world: A few examples include Pink Fuzz, Grapefruit Shandy, and Turtle Power Grapefruit Pale Ale.

The scent alone can provide you an increase

Citrus fragrances are ending up being more popular in aromatherapy for a reason. “Citrus is really fantastic for increased energy and vitality,” says Chiasson. “It will wake individuals up.”.

Not all aromatherapy is breathed in. You can also rub a vital oil on your skin, which enables you to feel it and inhale it at the same time. Grapefruit aromatherapy may even act as a natural skin toner, says Chiasson. [5]

How to Prepare Grapefruit

Individuals usually enjoy grapefruit by itself rather than in recipes or meals.

To eat a fresh grapefruit, first cut the fruit in half. Then, utilizing a spoon, dig the fleshy triangles of fruit out of the rind, avoiding the bitter walls nestled between little bits of fruit. Grapefruit can have a sharp, tasty taste to it– spraying a little sugar on it can cut the bite and make it taste much better.

For other ways to include grapefruit into your diet, think about:.

  1. Freezing grapefruit pieces and adding them into healthy smoothies
  2. Making grapefruit salsa as an accompaniment for fish
  3. Including grapefruit to a salad as a healthy alternative to salad dressing
  4. Making a quinoa bowl with grapefruit and avocado

Dosage of grapefruit

There is no normal dosage.

More than 4 glasses juice per day for pharmacologic effects, or 1-9 glasses daily, or 240 ml of double-strength juice two times daily.

Dosing Factors to consider– Should be Offered as Follows:.

Ventricular and Supraventricular Arrhythmias.

Betapace or Sorine: 80 mg orally every 12 hours at first; increased as required to 120-160 mg every 12 hours (2-3 days between increments).

Intravenous (alternative to oral): 75 mg over 5 hour every 12 hours initially; changed if required (on basis of tracking of medical effectiveness, quarterly interval, and adverse impacts) every 3 days; not to exceed 150 mg every 12 hours. [7]

How grapefruit juice can disrupt medications

With most drugs that are affected by grapefruit juice, “the juice lets more of the drug go into the blood,” says Shiew Mei Huang, Ph.D., of the FDA. “When there is excessive drug in the blood, you might have more side effects.”.

For instance, if you consume a lot of grapefruit juice while taking specific statin drugs to lower cholesterol, too much of the drug might stay in your body, increasing your danger for liver and muscle damage that can result in kidney failure.

Lots of drugs are broken down (metabolized) with the help of an essential enzyme called CYP3A4 in the small intestine. Grapefruit juice can obstruct the action of digestive tract CYP3A4, so instead of being metabolized, more of the drug goes into the blood and stays in the body longer. The outcome: excessive drug in your body.

The amount of the CYP3A4 enzyme in the intestinal tract varies from person to person. Some people have a great deal of this enzyme and others just a little. So grapefruit juice may affect individuals differently even when they take the exact same drug.

Although scientists have actually understood for a number of decades that grapefruit juice can trigger excessive of particular drugs in the body, more current studies have found that the juice has the opposite impact on a couple of other drugs.

” Grapefruit juice can trigger less fexofenadine to get in the blood,” reducing how well the drug works, Huang says. Fexofenadine (brand name Allegra) is readily available as both prescription and OTC to alleviate signs of seasonal allergic reactions. Fexofenadine might likewise not work also if taken with orange or apple juice, so the drug label says, “Do not take with fruit juices.”.

Why this opposite result? Instead of changing metabolism, grapefruit juice can impact proteins in the body referred to as drug transporters, some of which help move a drug into our cells for absorption. As a result, less of the drug gets in the blood and the drug may not work too, Huang says.

How Grapefruit Juice Impacts Some Drugs

When drugs are swallowed, they might be broken down (metabolized) by enzymes and/or soaked up utilizing transporters in cells discovered in the small intestine. Grapefruit juice can trigger problems with these enzymes and transporters, causing excessive or insufficient drug in the body.

Some drugs, like specific statins utilized to lower cholesterol, are broken down by enzymes. As revealed above, grapefruit juice can block the action of these enzymes, increasing the quantity of drug in the body and may cause more adverse effects.

Other drugs, like fexofenadine, are moved by transporters into the body’s cells. As revealed above, grapefruit juice can block the action of transporters, reducing the quantity of drug in the body and may trigger the drug to not work also. [8]

What side effects are possible?

Adverse effects can differ based on the communicating drug and possible adverse effects.

Adverse effects can range from abnormal heart rhythms, stomach bleeding, muscle discomfort, muscle breakdown, kidney damage, low blood pressure, problem breathing, sedation, and dizziness.

Other responses may happen– it depends upon the drug and the levels of the drug in the blood.

If you have actually been warned about a possible drug interaction with grapefruit, ask your healthcare provider to describe the possible negative effects and find out how to recognize it. [9]
Grapefruit’s perpetrator chemical does not interact directly with your tablets. Rather, it binds to an enzyme in your digestive tract known as CYP3A4, which reduces the absorption of specific medications. When grapefruit juice blocks the enzyme, it’s easier for the medication to pass from your gut to your bloodstream. Blood levels will rise faster and higher than typical, and in some cases the abnormally high levels can be dangerous. [10]


Grapefruit interferes with proteins in the small intestine and liver that normally break down lots of medications.

Consuming grapefruit or drinking grapefruit juice while taking these medications can lead to greater levels of them in your blood– and more side effects.

With some drugs, with even small amounts of grapefruit can trigger severe side effects. For that reason, the mix should be prevented.

Your pharmacy might mark these drugs with a grapefruit interaction warning.

Make certain your doctor and pharmacist understand if you routinely consume grapefruit. They can assist you choose whether it’s safe to consume it while on specific medications. [11]


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