Two kiwis a day. What happened to the skin after 8 weeks
When we think, "I want to have beautiful skin," we tend to look for beauty serums and creams.
However, skin is a part of the body.
It is not just what we apply from the outside; what we eat every day also becomes the building blocks for our skin.
There is an intriguing study that makes us rethink this.
Surprisingly, it is a study that found changes in vitamin C levels and skin condition in the skin of people who ate two kiwis a day for eight weeks (Research from the University of Otago, New Zealand).
Improved Human Skin Vitamin C Levels and Skin Function after Dietary Intake of Kiwifruit: A High-Vitamin-C Food
A study on eating "two kiwis a day"
In a study published in 2025, people with low vitamin C intake were asked to eat two SunGold kiwis a day (approximately 250mg of vitamin C per day) for eight weeks.
The study measured not only the vitamin C in the blood but also the vitamin C actually contained in the skin.
As a result, after eight weeks, the following were confirmed:
An increase in vitamin C in the blood
An increase in vitamin C in the skin
Changes in skin "density"
Changes in indicators showing epidermal cell regeneration
were confirmed.
What particularly caught my attention here is the "skin density".
Focusing on the "foundation of the skin" rather than "skin becoming stronger"
It is easy to say, "Eating kiwis makes your skin stronger," but the study did not directly prove that "skin became stronger."
What was measured in the study were things like skin density and cell regeneration.
In other words,
Eat kiwis
↓
Vitamin C enters the body
↓
Vitamin C reaches the skin
↓
Possibility of changes in skin structure and cell condition
It seems reasonable to think that we have reached this point of understanding.
Why is vitamin C important for the skin?
When you hear vitamin C, you might have a strong image of "skin whitening."
However, that is not the only role of vitamin C.
Vitamin C is also necessary for the production of collagen, which forms the foundation of the skin.
Therefore, saying "vitamin C for the skin" is not just a beauty trend, but makes sense when considering how the body works.
And kiwis are fruits that contain vitamin C.
Moreover, the fact that you can eat them as fruit rather than as a supplement is also appealing.
However, it is not the case that "eating two will make you younger."
This is important.
While this study is interesting, the number of participants was small, and it was a relatively short-term study of 8 weeks.
Also, it is not a large-scale comparative study using a placebo.
Therefore,
"If you eat two kiwis, wrinkles will disappear"
or,
"Kiwis will make your skin age younger"
cannot be said.
Even so, what is interesting is that it is not simply a story about "it has a lot of vitamin C," but that they actually measured the vitamin C in the skin.
"What I ate is really reaching my skin."
When you think about it that way, the way you look at your daily meals changes a little.
I drink lemon water with squeezed lemon every morning. I thought I was getting plenty of vitamin C with that every day, but one tablespoon of lemon juice only has 6mg of vitamin C.
On the other hand, one kiwi has 125mg!
The recommended daily intake is 75mg for adult women and 90mg for adult men.
Oh my god! I'm not getting nearly enough!
Next time I see kiwis at the supermarket, I think I'll buy some and try eating one a day for eight weeks.
But wait, these gummies have 250mg per piece, aren't they the best? These are perfect for busy people. I'll buy some for my daughter.