Sunday, October 4, 2026
This is why I eat the apple skin
At home, many people peel apples out of habit. I stopped doing that years ago.
The skin is not just the fruit's packaging. It is where a good portion of the fiber and polyphenols are concentrated.
And there is one specific compound that made me look at it differently: ursolic acid.
In a paper published in Cell Metabolism, a team analyzed which genes are activated in human muscle when mass is lost, due to fasting or spinal cord injury.
Using that signature, they looked for molecules that did the opposite and found ursolic acid, a compound abundant in apples. In mice, it reduced atrophy and increased muscle mass.
The mice also accumulated less fat and lowered their glucose and cholesterol. Sounds good. But it is best to lower your expectations.
These were mice, using the isolated compound and laboratory doses. This study did not test apples or humans. Nobody has proven that an apple with its skin on will make your quadriceps grow.
So, why do I eat it anyway?
Because the cost is zero and the skin provides more fiber and polyphenols than the pulp.
I don't need an apple to be a drug to stop throwing half of the good stuff into the trash.
This is the logic I apply to almost everything. What has strong evidence, first. What has preliminary evidence and zero risk, is added. What promises a lot and supports nothing, out.
Don't look for the miracle food. Look for the decisions that cost you nothing and that you repeat a thousand times.
Your 1% improvement for today.
The next apple, wash it well and eat it with the skin. One gesture, zero effort, and you keep the part that almost everyone throws away.
This is what I cover in the Longevity Workshop and Private Longevity WhatsApp Group: Decisions like eating the apple with the skin are what I share daily in my workshop and private WhatsApp group on longevity.
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