I have to admit, the first time I heard about soaking pineapple in salt water, I wondered if someone had simply decided to make a perfectly sweet piece of fruit taste salty!
But there’s actually a good reason people do it.
A quick soak in lightly salted water can help tame some of the sharpness of fresh pineapple, and many people find that it makes the fruit more pleasant to eat. There’s also a fascinating little bit of food science behind the trick involving bromelain, the enzyme naturally found in pineapple.
And no, you don't need to turn your pineapple into a bowl of seawater!!
A mild salt-water soak is all it takes.
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Why Do People Soak Pineapple in Salt Water?
The biggest reason is simple: taste and texture.
Fresh pineapple contains an enzyme called bromelain. Bromelain is a group of protein-digesting enzymes naturally present in pineapple, particularly in the stem and fruit.
When you eat fresh pineapple, bromelain can interact with proteins in your mouth. For some people, that contributes to the familiar tingling, prickly, or slightly irritated feeling after eating a lot of fresh pineapple.
Salt-water soaking is commonly used as a traditional kitchen trick to make pineapple feel gentler to eat.
It can also slightly mellow the fruit's sharp, acidic flavor.
So if you've ever thought, “This pineapple is delicious... but why is my mouth tingling?” you're definitely not alone!
What Does Salt Water Actually Do to Pineapple?
There are a few things worth separating here.
It can make pineapple taste less sharp
Salt is a flavor enhancer. In a small amount, it can help balance sweetness and acidity rather than making the fruit taste salty.
That's why a tiny pinch of salt can make watermelon, tomatoes, chocolate, and even caramel taste more flavorful.
The same basic idea applies to pineapple.
It may help reduce the unpleasant mouth sensation
The bromelain in fresh pineapple is one reason some people experience that tingling sensation.
A salt-water soak may reduce the intensity of that experience, although it isn't a guaranteed way to remove all bromelain from the fruit.
The amount and concentration of the soak matter, and bromelain is not simply “washed away” by salt water.
It can make very tart pineapple more enjoyable
Some pineapples are beautifully sweet.
Others are intensely acidic and tart.
A short soak in lightly salted water can help balance the overall flavor, especially when the pineapple is particularly sharp.
What Is Bromelain?
This is the really interesting part!
Bromelain is the name commonly used for a group of proteolytic enzymes found in pineapple.
Proteolytic enzymes break proteins down into smaller components.
That's one reason pineapple has such a distinctive effect on the mouth. The enzymes can act on proteins in the tissues of your mouth.
It also explains why fresh pineapple can be useful in certain food preparations.
Why canned pineapple is different
If you've ever noticed that canned pineapple doesn't usually give you the same tingling sensation as fresh pineapple, there's a reason.
Commercial canning involves heating the fruit, and heat can deactivate bromelain.
So the enzyme is much more active in fresh pineapple than in heat-processed pineapple.
That's also why fresh pineapple can interfere with some gelatin-based recipes while canned pineapple generally doesn't have the same effect.
Does Salt Water Remove Bromelain?
