Upload labs from anywhere, see your trends clearly, and understand what changed over time. Private. Mac-native.
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Joined May 2025
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Hemo - Bloodwork tracker retweeted
NEW: Brad Gerstner (@altcap) & Jason Chang (@yoweichang) are trying to turn a $100 CAC heart scan into the “mammogram for the heart.”
At the All-In Summit, Brad brought his mobile coronary artery calcium CT scanner to screen attendees & make the case for preventing heart attacks at scale.
Heart disease kills ~800,000 Americans annually. Brad believes scaling CAC scans to 40M people a year could save 50,000 lives & $20B in government healthcare costs annually.
Rob Goldberg joined us to explain why the mission is deeply personal.
His brother Dave Goldberg, married to Sheryl Sandberg, died suddenly at 47 from undiagnosed heart disease, leaving behind their two young children. Just five months earlier, he had passed a running EKG.
“My brother had passed a running EKG five months before he dropped dead from heart disease, from undiagnosed heart disease.”
Dave’s death became the foundation for Sandberg’s book Option B, co-written with Adam Grant, about grief, resilience & rebuilding life after devastating loss.
Now Brad Gerstner, Rob Goldberg, Jason Chang & the rest of the besties, & the team behind the Center for Heart Attack Prevention want to prevent more families from experiencing the same thing, pushing for earlier detection, broader access to CAC scans & changes to the standard of care.
We go inside the mobile scanner & discuss:
› Why Brad calls CAC scanning the “mammogram for the heart”
› The Goldberg family’s experience with undiagnosed heart disease
› Why cholesterol & traditional testing can miss cardiovascular risk
› What CAC scores actually tell you
› Difference between a calcium CT scan & an angiogram
› Why Brad bought his own mobile scanner
› The “buy one, give one” model for expanding access
› Brad’s push to bring CAC screening to 40 million Americans a year
› How a roughly $100 scan could potentially prevent thousands of premature deaths
› Why Brad believes health data gives people the power to take action
𝐓𝐈𝐌𝐄𝐒𝐓𝐀𝐌𝐏𝐒
00:00 Brad Gerstner & Rob Goldberg
00:10 CAC Scanner Moonshot
01:53 Rob’s Family Tragedy
04:39 Center Missions and Prevention
05:37 Why Cholesterol Became Standard
10:07 Overcoming Fear and Insurance
12:29 CAC vs Angiogram Guidance
14:43 Where the Trailer Goes Next
16:40 Inside the Scanner Demo
20:48 Why Labs Miss Risk
23:27 Final Call to Action
Hemo - Bloodwork tracker retweeted
Awesome Mac app! Great developer too.
Introducing Health Snapshot in Hemo.
The snapshot is useful because it highlights the most meaningful trends across all your data. And it stays up to date with each new upload of lab work.
Automatically.
From what happened this test to what's happened over the last couple years.
v1.0 available now in beta.
Hemo - Bloodwork tracker retweeted
The most misunderstood number in all of medicine is the one many doctors call normal.
Your labs come back, everything sits inside the reference range, nobody says a word, and you walk out believing you're healthy. But normal and healthy were never the same thing.
I spent years in the clinical laboratory building and running these reference ranges. Let me show you exactly where normal comes from, why it's a far softer number than you think, and the difference between normal, optimal, and the territory where you're quietly sliding toward a diagnosis.
This will change how you read every lab report you ever get again.
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Hemo - Bloodwork tracker retweeted
It’s very common. A lot of docs don’t even think about it. When you learn how a lab creates “normal” you’ll want to be anything but.
There’s a few options out there where companies give you the ability to upload your reports from other labs into a database that interprets the values and displays them in an optimal format and helps you track trends over time before they become a diagnosis.
Had the opportunity to speak with one of the developers of such a system recently. @SurrealBlend is building tryhemo.com or @tryhemo - he left a job at Microsoft to build something that had a personal interest to him after he got a CAC score done and was introduced to a true need in the market.
Keep an eye out. He’s doing it right.
Hemo - Bloodwork tracker retweeted
Last year, at 34, I found out I had a CAC score of 213.
That means I had visible, calcified plaque in the arteries around my heart.
I ranked in roughly the 94th percentile for my age.
I wasn’t obese. I wasn’t eating fast food every day. I wasn’t ignoring my health.
I lifted. I ran my first half marathon. I ate well. I tracked bloodwork. I worked with a doctor. By most external measures, I looked like someone who was on top of things.
But that wasn’t always my story.
For much of my teens and twenties, I struggled with weight, stress, alcohol, poor sleep, and the usual bad decisions you assume you can outrun later.
And for a while, it seemed like I had.
I got the scan expecting a 0.
I thought it would be reassurance.
Instead, it changed the entire direction of my life.
Here’s the story behind why I dove head-first into building Hemo…
Hemo - Bloodwork tracker retweeted
American physicians are remarkably pro-AI, and getting more supportive each year.
76% of doctors believe AI can help their ability to care for patients. And 70% believe that patients’ use of general-purpose AI chatbots for health information is positive / or has no impact.
AI will not become a part of American healthcare without buy in from physicians (i.e. individual physicians, not the AMA or other societies, that don't necessarily speak for docs).
Misguided ideas like the NY state bill would limit patient access to these tools. But most American doctors understand that banning data centers is bad for patients.
Hemo - Bloodwork tracker retweeted
Heart disease is the #1 killer.
If you’re going to focus on one thing, this is it.
My bloodwork is below.
ApoB is the North Star metric. Many docs say it’s the only thing that matters. There is 1 ApoB protein attached to each bunch of cholesterol (fat) as it travels through the blood.
Know and control this number.
My ApoB is in the top 1% of all humans. Under 50 is ideal. Over 70 is bad. Up near 90 or higher and you are on a fast track to heart disease.
Average doctor will send you on your way at these numbers and tell you to come back when you have a heart attack. Most won’t even include it in bloodwork.
The system is broken.
My LDL is top 5%. Over 80 is bad. Over 100 is really bad.
My triglycerides are optimal. Under 100 is good. Over 120 or so is bad.
But I’m part of the 20% of humans with high Lipo(a).
It’s genetic. 49 is very bad and there is nothing I can do about it with diet or lifestyle.
This increases risk in all areas. And pharmacology cant impact it.
It’s why my heart contrast scan showed plaque buildup already.
So what do I do?
Hyper focus on the others. Make sure ApoB is very low around 40. Work on LDL and triglycerides more.
Workout. Get heart rate up above 120 for 120 minutes or more per week. Zone 2 is great for heart health.
I’m fasting for 72 hours 1x a quarter. No calories. This lets my body enter a deep state of autophagy and my good cells eat my bad cells. My body consumes some of the soft plaque on the walls of my arteries.
This also helps reduce my cancer risk because my healthy cells eat my B cells and unhealthy cells that are more likely to turn into cancer.
I recently started Repatha - peptide that creates more receptors on the outside of my liver that pull these proteins out of my blood. It’s expensive at $550 a month because my insurance won’t cover it.
Statins are great options for a lot of people. Cheap and effective. Some side effects.
The bottom line:
If you don’t know these numbers, you are foolish!
Don’t wait until you have a heart problem.
Hemo - Bloodwork tracker retweeted
Imagine managing your budget by downloading random PDFs from five different banks, all in different formats, every few months. Then just... guessing whether your habits are working.
That's basically how most people deal with blood work today.
It’s hard for patients to see the full picture, and hard for clinicians to get a clean longitudinal view without a lot of manual effort.
I'm building Hemo (@tryhemo). It's a Mac app where you import blood work from anywhere, and it turns years of scattered results into trends you can actually follow.
Did that supplement move anything? Is your cholesterol really trending down, or was it just one good test?
And while it’s AI-powered, your health data lives on your device, we never store it.
Our mission is to make personal health tracking feel as simple and empowering as your favorite budgeting app.
It's available to try today for free, in a private beta. (Link below)
Hemo - Bloodwork tracker retweeted
15 sessions of sauna dramatically reduced toxins in my body.
+ 65% drop in 2,4-D
+ 100% drop in MEP
+ 15% drop in MBP
+ 100% drop in MEHP (undetectable post sauna)
+ 56% drop in NAPR
+ 56% drop in HEMA
+ 100% drop in Perchlorate (undetectable post sauna)
After completing fifteen sauna sessions, each lasting 20 minutes at 200°F, led to a significant reduction in my environmental toxins, three went from being abnormally high to undetectable post sauna.
Hemo - Bloodwork tracker retweeted
Left or Right? Trying to decide if it's worth updating the biomarker status chart in @tryhemo
... (left is a figma proto)
