Grapefruit vs Pineapple – Which is Healthier?

Our Verdict

When comparing grapefruit to pineapple, we picked the pineapple.

Why?

In terms of macros, these two fruits are “very much of a muchness”, insofar as they approximately the same fiber, carbs, and protein—so a tie in this first category.

In the category of vitamins, grapefruit has more of vitamins A, B5, and E, while pineapple has more of vitamins B1, B2, B6, B7, B9, C, and K, winning this round.

Looking at minerals, grapefruit has more calcium, phosphorus, and potassium, while pineapple has more copper, iron, magnesium, manganese, selenium, and zinc, winning another round.

In other considerations, pineapple has bromelain (a highly beneficial enzyme group that’s unique to pineapple); see the link in the “learn more” section for more about this. So, one more point for pineapple here.

One more consideration that’s not shown in the nutritional values, is that grapefruit contains high levels of 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.

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!

PS: the same substance is quite available in pummelos and sour oranges (but not meaningfully in sweet oranges); you can see a chart here showing the relative furanocoumarin contents of many citrus fruits, or lack thereof as the case may be, as it is for lemons and most limes).

In any case, adding up the sections makes for a clear overall win for pineapple, but by all means do enjoy either or both (if grapefruit isn’t contraindicated for you because of the medications interactions)!

Want to learn more?

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Bromelain vs Inflammation & Much More

Enjoy!