Why Do We Still Use 150-Year-Old Technology To Measure the #1 Killer of Humans Worldwide? The New Approach To Blood Pressure Measurement With Tom Moss.
Boundless Life
Ben Greenfield
4.6 • 5.3K Ratings
🗓️ 18 July 2026
⏱️ 72 minutes
🧾️ Download transcript
Summary
Full show notes: https://bengreenfieldlife.com/signalspodcast
In this episode with Tom Moss, founder and CEO of Vital Signals, you'll hear how a near-fatal hypertensive crisis during a family vacation became the founding moment for a device that may finally solve the problem of getting accurate blood pressure readings in real life without a cuff. Tom explains why blood pressure is the single most important indicator of long-term cardiovascular health and yet one of the least accurately measured, what the cuff gets wrong, and how Vital Signals achieved the scientific breakthrough that other companies failed to crack: accurate, calibration-free blood pressure monitoring from a ring. You'll also hear about the interplay between sleep, stress, hormones, sauna, cold, and blood pressure, what the Signal Ring's data is already revealing about human arterial health, and where this technology could go over the next decade.
Tom Moss is the founder and CEO of Vital Signals, building at the intersection of heart health, technology, and everyday behavior. After his experience with undiagnosed hypertension, he became focused on why some of the most critical health signals remain so difficult and often stressful to understand.
Pre-order your Signal Ring from LIFE Market and measure your blood pressure without the cuff. Ships October 2026.
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Transcript
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| 0:00.0 | My name is Ben Greenfield, and on this episode of the Boundless Life podcast, |
| 0:04.8 | people don't actually really know their blood pressure at all. |
| 0:07.5 | You probably don't really understand your blood pressure, and it's because the cuff is... |
| 0:11.4 | Number one and number two causes of death are basically related to arterial health and blood pressure, right? |
| 0:16.3 | There's no device on the market today that can do that. |
| 0:19.1 | This is the first device in the world that's available |
| 0:21.8 | to consumers that can accurately measure blood pressure without calibration from a cuff. |
| 0:28.5 | Welcome to The Boundless Life with me, your host, Ben Greenfield. I'm a personal trainer, exercise |
| 0:34.7 | physiologist, and nutritionist, and I'm passionate about helping |
| 0:38.1 | you discover unparalleled levels of health, fitness, longevity, and beyond. |
| 0:48.9 | Let's talk ketones. The whole drinkable, eatable ketone category has become very noisy. A lot of products |
| 0:57.5 | marketed as ketones are not actually delivering ketones directly. They're delivering ketone |
| 1:02.7 | precursors that your body still has to convert first, which creates a very different experience |
| 1:08.5 | physiologically and from a performance standpoint, |
| 1:12.1 | a recovery standpoint, and all the reasons that you'd want to use ketones. My ketone of choice |
| 1:17.6 | has become Tecton, T-E-C-T-O-N. They use something called R-3HBG, which is technically bioidentical D-Betaoxybutyate, that's a mouthful, essentially the |
| 1:31.9 | same ketone molecule your body naturally produces during ketosis. |
| 1:35.7 | No precursor conversion, no ethanol byproduct, and in my experience, a much cleaner and more |
| 1:40.7 | stable effect compared to the other ketone products that have saturated the market. |
| 1:45.7 | And what makes this stuff especially interesting is the science and the regulatory side. |
| 1:50.3 | First of all, tecton's molecule is the first ketone ingredient recognized by the FDA as a new |
| 1:55.6 | dietary ingredient. That's actually a very significant differentiator in a category that |
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