Friday, September 25, 2026
Cold hands and feet tell me a lot about this longevity issue
Wearing socks to bed in June isn't just a quirk. It is information.
Your hands and feet are at the end of your blood's journey. If circulation isn't reaching them properly, that's where you notice it.
The common causes are well known: low iron, sluggish thyroid, smoking, low muscle mass, persistent anxiety. It is worth ruling these out before looking for obscure explanations.
But there is another piece that almost no one looks at: the ability of your arteries to dilate when the body calls for it.
This capacity can be measured in the arm artery. It is compressed for a few minutes, released, and observed to see how much it widens when the flow returns.
It is a way to check if the endothelium, the inner lining of your vessels, is responding well.
A meta-analysis of fourteen studies with over 5,000 people found that the better this response was, the lower the risk of suffering cardiovascular events in the following years.
It is an observational association, not a cause-effect relationship. The studies were uneven in quality, and the authors themselves doubt that this measure adds much to classic risk factors.
And that study did not look at cold hands or thermal sensation. What it does suggest is that the response of your arteries is related to your future cardiovascular health.
That is why it is not wise to treat constantly freezing feet as a mere nuisance. It is a sign that deserves to be looked at with blood work and context.
Your body has been speaking to you through your extremities for years. Listen to it.
Your 1% improvement for today.
If you regularly have cold hands or feet, write it down and ask for ferritin and thyroid panel levels in your next blood work.
This is what I cover in the Longevity Workshop and Private Longevity WhatsApp Group: In the Longevity Workshop I teach you which lab tests to request when faced with signs like cold feet, and in the group, we resolve your doubts.
Remember that I now sell only ONE access to the Longevity Workshop and Private Longevity WhatsApp Group per day.
The price is set by Dutch auction.
It drops throughout the day.
→ See the current price of the Longevity Workshop and Private Longevity WhatsApp Group