Our mission

Supplements should be informed by your biology, not by marketing.

Most people take supplements based on articles, influencers, or guesswork. Your genetic data may offer real insights into which supplements are worth exploring. That information should be accessible, private, and free.

I spent years searching for answers I could not find. Turns out, the clues were in genetic data I had already collected and never fully explored.

Jeff Goodman, Founder

The problem

The information exists. Access doesn't.

Millions of people have genetic data sitting unused. The raw files from 23andMe and AncestryDNA contain health-relevant variants that most people never look at.

Functional medicine practitioners can help interpret that data, but it costs thousands of dollars and takes years of appointments. AI can help you explore that research faster, though it doesn't replace professional guidance.

Stack Precision was built to close that gap: make genetic-supplement research accessible, private, and free.

40M+

Consumer genetic tests taken

Most people never touched the health data.

194

Variants we track

Each backed by published supplement research.

Core features

Tracking, profiles, and journaling. Free forever.

Jeff Goodman, founder of Stack Precision

The backstory

I spent years trying to figure out why I felt terrible.

Food intolerances. Chronic pain. Brain fog that made entire afternoons unproductive. Doctors ran standard panels, found nothing actionable, and suggested I manage stress better. One specialist at a leading NYC hospital laughed at my questions, then sent me a bill for hundreds of dollars.

I tried every supplement I could find recommended online. Nothing moved the needle. In some cases, the wrong supplement caused severe discomfort.

When I finally dug into the genetic data I already had and started mapping my variants to supplements, things changed. Not overnight, but measurably. The key insight was not just which supplements to try. It was that many of them interact: some work together, others work against each other, and they have to be carefully balanced. In some cases, a manufacturer's "standard serving" was many times more than my body could tolerate.

My MTHFR and COMT variants suggested why standard B vitamins may not have been effective for me. It was not as simple as switching to methylfolate. I needed a specific balance of supplements that support the ways my methylation cycle is impaired, including methylfolate, but I also had to identify supplements that were likely triggering reactions. Working with my provider to find that balance seemed to make a meaningful difference.

It took me years and many, many hours of research to surface those connections. AI can now help explore that research in seconds.

Most of my symptoms improved significantly once I had better information to work with. Stack Precision is the tool I wished existed when I was still guessing.

I have 20+ years in tech across startups and Fortune 200 companies. I built Stack Precision because I know what it feels like to have answers hiding in data that nobody is helping you read.

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Why now

Three things changed that made this possible.

Consumer genetic testing went mainstream. Over 40 million people have raw data files from 23andMe, AncestryDNA, and similar services. Most have never looked at the health data.

AI can now help surface research at scale. Understanding connections between genetic variants and supplement research used to be limited to specialists. Large language models can now help you explore that research faster, though they don't replace professional guidance.

On-device processing solves the privacy problem. Genetic data can be parsed on your phone without ever leaving your device. HIPAA-grade encryption handles the rest. The technology to be both useful and private finally exists.