Grapefruit vs Orange – Which is Healthier?

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Our Verdict

When comparing grapefruit to orange, we picked the orange.

Why?

It’s easy, when guessing which is the healthier out of two things, to guess that the more expensive or perhaps less universally available one is the healthier. But it’s not always so, and today is one of those cases!

In terms of macros, they are very similar fruits, with almost identical levels of carbohydrates, proteins, and fats, as well as water. Looking more carefully, we find that grapefruit’s sugars contain a slightly high proportion of fructose; not enough to make it unhealthy by any means (indeed, no whole unprocessed fruit is unhealthy unless it’s literally poisonous), but it is a thing to note if we’re micro-analysing the macronutrients. Also, oranges have slightly more fiber, which is always a plus.

When it comes to vitamins, oranges stand out with more of vitamins B1, B2, B3, B6, B9, C, and E, while grapefruit boasts more vitamin A (hence its color). Still, we’re calling this category another win for oranges.

In the category of minerals, oranges again sweep with more calcium, copper, iron, magnesium, manganese, potassium, and selenium, while grapefruit has just a little more phosphorus. So, another easy win for oranges.

One final consideration that’s not shown in the nutritional values, is that grapefruit contains furanocoumarin, which can inhibit cytochrome P-450 3A4 isoenzyme and P-glycoptrotein transporters in the intestine and liver—slowing down their drug metabolism capabilities, thus effectively increasing the bioavailability of many drugs manifold. It can also be found in lower quantities in Seville (sour) oranges, and it’s not present (or at least, if it is, it’s in truly tiny quantities) in most oranges.

This may sound superficially like a good thing (improving bioavailability of things we want), but in practice it means that in the case of many drugs, if you take them with (or near in time to) grapefruit or grapefruit juice, then congratulations, you just took an overdose. This happens with a lot of meds for blood pressure, cholesterol (including statins), calcium channel-blockers, anti-depressants, benzo-family drugs, beta-blockers, and more. Oh, and Viagra, too. Which latter might sound funny, but remember, Viagra’s mechanism of action is blood pressure modulation, and that is not something you want to mess around with unduly. So, do check with your pharmacist to know if you’re on any meds that would be affected by grapefruit or grapefruit juice!

All in all, today’s sections add up to an overwhelming win for oranges!

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