Grapefruit: What are your main nutrients?

Grapefruit: What are your main nutrients?


Grapefruit is a citrus fruit belonging to the family of Rutaceae and comes from the tree Citrus paradisi. About 15 centimeters in size, is coated with a thick, fleshy shell, yellow or rosacea . Its origin is not known, but as in the rest of citrus, is believed to come from Asia. The Interprofessional Association of Lemon and Grapefruit ( Ailimpo ) and the Spanish Nutrition Foundation ( FEN ) indicate that grapefruit occurs in tropical and subtropical climates around the world.

Although occurring in these climates, it can be consumed in the world. As this citrus depending on the variety of mature, with intent between the fall in the winter, you can eat it in the months of October, November, December, January, February and March.


Although it is taken in all countries of the world, it is not the most common citrus, at least and Spain. As recalled by the Spanish Association of Manufacturers of Juices ( Asozumos ), its consumption is markedly lower than the orange, tangerine or lemon . Despite this, grapefruit is a different alternative that has many nutrients.

FEN Ailimpo and what are the main point:

1) Carbohydrates

Water is the most abundant component, with more than 90 percent of grapefruit. It is, therefore, a good diuretic. It also contains low calorific value (only 35 calories per 100 grams of fruit). The low calorie in this fruit comes from  carbohydrates  (7 grams per 100 grams of grapefruit).

2) Vitamin C

It is also rich in vitamin C . In fact, a grapefruit exceeds about 30 milligrams recommended daily intake of this nutrient. Vitamin C is important because it encourages the development of collagen and red blood cells and enhances the absorption of iron from food.

The folic acid has a presence, though not as representative . Despite this, it should be noted that this acid influences the development of red blood cells and white blood cells, the genetic material in formation and development of immune system antibodies.

3) malic, oxalic, tartaric and citric

Other compounds are grapefruit malic, oxalic, tartaric and citric acid, that will give this fruit its characteristic flavor .

4) Flavonoids

Grapefruit juice contains flavonoids such as naringin, naringenin and quercetin . The amounts of these compounds vary according to the variety in question, fruit maturity, the climatic conditions were developed so is the juice manufacturing process.

The most abundant of the three is naringin, element not found in other citrus and gives this fruit its bitterness.

5) Minerals, fiber and carotenoids

Besides these flavonoids, grapefruit contains two minerals : the potassium and magnesium . Just under presence it has the fiber , which provides only 1.6 grams per 100 grams of citric, fewer than in ant other fruits. This fiber is mainly between the pulp and rind in the white part.

As carotenoids, only they have significant presence in the pulp variety possessing dark.

Types grapefruit

All these nutrients are common in all varieties, but there are four varieties of grapefruit have to differentiate.The names of the different types vary according to place of origin, size and color.

FEN Ailimpo and emphasize that there are basically four types and the essential characteristics of each of them:

1) White Grapefruit

This grapefruit is characterized by an average size and weigh about 300 grams. The pulp is light cream -colored skin, smooth texture, has a soft pale or yellow. Much juice this variety is obtained and is the most acidic and consumed in Spain. October is normally eat.

2) Pink Grapefruit

Pink grapefruit called by the color of its flesh and skin, this type is an important source of lycopene . It also collects in October.

3) Star Ruby

Out because its juice content is higher than other varieties. It is recognized to be a medium sized fruit, seeds lacking. It has a thin skin, c odor between roasted yellow and red.

4) Red River

Red River is also known as Ray Ruby or Henderson. It has a less intense color as the Star Ruby variety which exceeds in size, although both juice contains this.

It is common to take River Network in Spain. Corroborating data Ailimpo and FEN, indicating that in this country only 16.4 percent of the population consumes often, compared to 83.6 percent who do not usually take. Another 39.2 percent of the population has tried on occasion, but did not liked it.

Drug interaction

Although prefer one or another variety, the juice of all these varieties is consumed worldwide. The Spanish Society of Hospital Pharmacy emphasizes its role as protector against cardiovascular diseases andcancers .

Still, for years it has studied the interaction of citrus, especially grapefruit juice with certain drugs.

This study indicates that grapefruit juice increases plasma concentrations of different drugs . This increase has been associated with increases in the frequency of adverse effects .

Some of the drugs in which this interaction occurs are:

  • Antimalarials (artemether and halofantrine)
  • Antiarrhythmics (amiodarone and propafenone)
  • Antibiotics (erythromycin)
  • Anticonvulsants (carbamazepine)
  • Antihistamines (astemizole, terfenadine and fexofenadine)
  • Antineoplastics (etoposide)
  • Antiparasitic (praziquantel and albendazole)
  • Blockers calcium channel (amlodipine, felodipine, lacidipine, diltiazem, lercanidipine, nifedipine, nimodipine, nisoldipine, nitrendipine, barnidipine, verapamil)
  • Oral contraceptives (ethinyl estradiol)
  • Benzodiapezinas (diazepam, midazolam and triazolam)
  • Beta – blockers (celiprolol)
  • Protease inhibitors (saquinavir)
  • Immunosuppressants (cyclosporine, sirolimus and tacrolimus)
  • Other  psychiatric drugs (buspirone, clomipramine, fluvoxamine and sertraline)
  • Corticosteroids (budesodina, methylprednisolone and prednisone)
  • Prokinetic (cisapride)
  • Other (sildenafil, vardenafil and ivabradine)

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