Surprising Health Benefits! Reasons to Eat Kiwi and Pineapple Peels

Kiwi with the Skin, What About Pineapple? Deciphering the "Nutritional Parts We Discard"

Cut a kiwi in half and scoop it out with a spoon. Cut off the pineapple skin thickly. In our usual kitchens, we almost unconsciously separate "edible parts" from "discarded parts."

However, news from the UK has prompted a reevaluation of these boundaries. The video title posted by the BBC is "Why you should eat kiwi and pineapple skins." In Japanese, it translates to "Reasons to Eat Kiwi and Pineapple Skins," a headline that makes you do a double-take.

While eating kiwi skin might be imaginable, eating the hard pineapple skin might surprise some.

What should be noted here is that the fact that skins contain nutrients and the act of putting skins directly into your mouth are not the same discussion. This news is not about a competition to eat fruits whole, but rather a chance to reconsider how we use ingredients, revealing its true meaning.

The UK Study Examined the Parts We Usually Discard

A study released by King's College London on October 30, 2026, compared the dietary fiber in commonly eaten parts and easily discarded parts of 12 types of produce common in the UK.

The results showed that in 10 types, parts like skins and stems contained more dietary fiber. However, there were exceptions, such as broccoli stems having less fiber than the florets we usually eat.

In other words, there isn't a simple rule that "the outer parts always have more nutrients." The starting point is that it varies depending on the ingredient and the part.

The study introduces the concept of "root-to-tip," which means making the most of all edible parts from the root to the tip. However, this component comparison alone cannot conclude that eating certain skins will prevent diseases.

Kiwi Skins Are Edible. "50% Increase" Also Depends on the Variety

Firstly, regarding kiwi skins, Zespri, the distributor in Japan, also states that they are edible, provided they are washed well before eating.

According to the company's data, two green kiwis contain 4 grams of dietary fiber in the flesh, and an additional gram if eaten with the skin. On the other hand, two SunGold kiwis contain 2 grams, and eating them with the skin allows for 50% more intake.

Here, it's important to understand the numbers. The explanation "50% more if eaten with the skin" should not be uniformly applied to all kiwis. Also, these figures are based on the company's research.

If you want to try, you can thinly slice a well-washed kiwi with the skin. There's no need to bite into it whole immediately. Methods such as mixing it into a salad with other ingredients are also introduced.

Whether to peel or leave the skin is not a binary health test. First, try a slice and see if you find it tasty.

Consider Pineapple "Skin" and "Core" Separately

Unlike kiwis, pineapples are more challenging to handle in the same way.

In a related BBC article, nutritionist Kirsten Jackson suggests mixing the core into smoothies but does not recommend the hard skin.

Even within the same fruit, the soft flesh, fibrous core, and hard outer skin differ in ease of eating. Even if the headline mentions "pineapple skin," it is not appropriate to take it as an article recommending biting into the outer skin at home.

Research on processing pineapple waste considers extracting components from skins and cores for potential use in food products. Such research is important for reevaluating what was previously discarded as a resource.

However, there is a significant gap between extracting and processing components in a factory and eating raw skins at home. Information that "useful components are included" does not determine home cooking methods or appropriate amounts.

Beware of the Leap from "Contains Enzymes" to "Healthy"

In discussions about pineapples, the enzyme mixture "bromelain," which breaks down proteins, often appears.

However, introducing the function of components in research does not directly lead to the conclusion that "eating the skin is beneficial." The quantity and conditions differ between research using concentrated products and consuming small amounts as food.

The U.S. National Center for Complementary and Integrative Health organizes the research status and safety of bromelain by use. When reading such materials, it is necessary to distinguish whether the subject is food, supplements, or pharmaceuticals.

What should be noted in this topic is not eating hard skins seeking special health effects, but rather what potential uses exist for parts not typically used in everyday meals.

On Social Media, "The Skin Tastes Good" and "Can't Stand the Texture" Coexist

So, how do people who actually eat kiwis with the skin feel about it?

On the overseas forum Reddit, there have been posts about kiwi skins for some time. In a thread titled "Anyone else eat the kiwi skin?" the poster shared their experience of finding out it's edible and liking the taste.

On the other hand, another thread titled "Kiwi skin" shows opinions of people interested in nutrition but disliking the texture of the skin.

Additionally, posts favoring eating with the skin mention experiences of being looked at strangely when talking about it with others.

These are not reactions to the current BBC video or representative surveys of public opinion. However, they do hint at what might be barriers when the habit of eating with the skin spreads. Nutritional explanations alone do not easily change the roughness felt in the mouth or the long-standing eating habits.

Knowing that something is "edible" and wanting to "eat it again" requires culinary ingenuity to bridge the gap.

First, Wash with Running Water. Even if Peeling

Before considering whether to eat the skin, it's essential to focus on washing as a basic step.

The U.S. Food and Drug Administration (FDA) advises washing fruits and vegetables thoroughly under running water before preparing or eating them. Even if not eating the skin, washing first is important because dirt and bacteria on the surface can transfer inside when cutting or peeling.

The agency does not recommend using soap or household detergents to wash produce. Washing helps reduce bacteria but does not remove them all.

It's also wrong to think "anything can be eaten if washed." There's no need to force yourself to eat spoiled or rotten items to reduce food waste.

Valuing ingredients and ensuring safety are meaningful only when they coexist.

For Japanese Tables, Start with "Just One Item" Instead of "Everything"

If you want to incorporate this topic into Japanese households, there's no need to start by challenging the outer skin of pineapples.

For example, try leaving just one slice of kiwi with the skin on, which you usually peel. Cut the broccoli stems you usually discard into easy-to-eat pieces and add them to your cooking. What's important is to confirm "eating deliciously" before aiming for "not wasting."

Regarding dietary fiber, it's not about increasing it all at once. Related BBC reports point out the need to gradually increase it to avoid bloating and that it may be burdensome for people with irritable bowel syndrome.

Zespri also recommends peeling for children with undeveloped digestive functions and people with weak stomachs.

Not everyone in the family needs to eat the same way. Those who like it with the skin can eat it as is, while those who don't can peel it. If that maintains the enjoyment of eating fruit, it's a perfectly reasonable choice.

Think Before Discarding, But Don't Force Yourself

Hearing that "skins have nutrients" might make you feel like you've been missing out by discarding them until now.

However, the message to take from this news is not to add new obligations to your table. It's that there are still parts you can choose again in your usual preparation.

Know the edible parts. Choose methods that suit the ingredients. If it's not tasty, think of another use. If it still doesn't work, don't force it.

Don't treat the thin kiwi skin and the hard outer pineapple skin as the same, but discern their respective characteristics. Such small judgments can transform health topics from fleeting trends into everyday cooking.

Sources and References

1. BBC News: Video on the Current Topic
   https://www.bbc.com/news/videos/cx30e2v3m3vqo

2. King's College London: Announcement by Research Institution
   Comparison of dietary fiber by part in 12 types of produce and confirmation of the "root-to-tip" concept.King's College London
   https://www.kcl.ac.uk/news/eating-root-to-tip-could-help-your-health-and-the-planet

3. BBC Related Article (Published on AOL): Introduction of Research and Nutritionist's Cautions
   Reference to the different handling of pineapple core and hard skin, and the caution to gradually increase dietary fiber.AOL
   https://www.aol.co.uk/articles/biggest-fibre-boost-could-scraps-004035000.html

4. Zespri Official: How to Eat Kiwi Skin and Nutritional Components
   Confirmation of dietary fiber numbers by variety, washing, and methods of eating such as slicing and adding to salads. The numbers are based on the company's research.Zespri Official
   https://www.zespri.com/ja-JP/blogdetail/can-i-eat-the-skin-of-kiwifruit

5. Zespri Official: Explanation About Kiwi
   Reference to the guidance recommending peeling for children and people with weak stomachs.Zespri Official
   https://www.zespri.com/ja-JP/blogdetail/mottainai_kiwi_myths

6. Academic Review: Component Extraction and Utilization of Pineapple Processing Residues
   Research background on resource utilization of skins and cores. This is not a document recommending eating raw outer skins at home.PMC
   https://pmc.ncbi.nlm.nih.gov/articles/PMC9525513/

7. U.S. NCCIH: Research Status and Safety of Bromelain
   Reference material to distinguish between food, supplements, and pharmaceuticals.NCCIH
   https://www.nccih.nih.gov/health/bromelain

8. U.S. FDA: Safe Handling of Produce
   Confirmation of washing with running water, reasons for washing before peeling, and not using detergents.FDA
   https://www.fda.gov/food/buy-store-serve-safe-food/selecting-and-serving-produce-safely

9. Reddit: Public Posts About Kiwi Skin
   Summary of opinions favoring the taste, disliking the texture, and experiences of reactions from others. This is a summary of posts found through searches and not direct reactions to the current report.reddit.com
   https://www.reddit.com/r/fruit/comments/1d4xime/
   https://www.reddit.com/r/fruit/comments/1jy6oel/
   https://www.reddit.com/r/unpopularopinion/comments/1habyb7/