What are those "threads" on the banana and why do they appear all the time?

Friday 8 May 2026 15:30 - Mirella Mendonça
What are those threads on the banana and why do they appear all the time?

You may have noticed: when you peel a banana those thin "threads" appear stuck to the fruit and many people remove them automatically, almost by instinct. They look strange, sometimes even annoying, and give the impression that they shouldn't be there. But the truth is that these filaments are part of the very structure of the banana and have a much more important function than first appears.

The most curious thing is that, despite being so common, hardly anyone can explain what these threads really are or why they appear so often. Do they indicate quality? Are they signs of maturity? Or just a natural detail ignored for years? Understanding what's behind them completely changes the way you look at a simple banana.


What are those "threads" on the banana?

These threads have a scientific name: phloem bundles.

They are responsible for transporting nutrients inside the banana during its growth.

In practice, they act as a "plumbing" system for the fruit:

  • carry sugars
  • distribute water
  • help with internal development

In other words, they are not defects - they are essential for the banana to grow properly.

Why are they more visible?

During ripening, bananas undergo several changes:

  • the pulp becomes softer
  • the sugars increase
  • the internal structure changes

It is during this process that the strands become more apparent.

In addition:

  • some banana varieties have more threads
  • riper bananas tend to leave them looser
  • the way they are peeled can also highlight these strands

Are they bad for you?

This is a common question and the answer is simple:

No, they don't do any harm.

In fact:

  • they are edible
  • contain fiber
  • are a natural part of the fruit

You can eat them normally without any worries.

So why do so many people take it off?

Mainly because of the texture.

Some people find it

  • unpleasant to chew
  • visually strange
  • or simply prefer a "cleaner" banana

But this is entirely personal and has nothing to do with food safety.

Curiosity that few people know

These threads are so important that, without them, the banana wouldn't grow properly.

They are literally the system that "feeds" the fruit as it grows.

In other words: what many people throw away... is exactly what helped the banana to exist.

Can it be avoided?

Not completely, but you can reduce the perception:

  • choose less ripe bananas
  • peel more carefully
  • remove the strands by hand if you want to

But remember: this is more a matter of aesthetics than necessity.

The banana's "threads" are not a mistake, dirt or something foreign; they are an essential part of the fruit.

They ensure that the banana grows, develops and reaches you ready for consumption.

In the end, what seems like an annoying detail is actually a small reminder of how natural foods are more complex than they seem.

Mirella MendonçaMirella Mendonça
I am the editorial manager at Petitchef (Portugal and Brazil) and a huge enthusiast of travel and world cuisine, always in search of new flavors and experiences. However, as much as I love exploring the delights of different cultures, my mom's cooking will always be my favorite — with that unique flavor that only she can create.

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