Chapter 3 · Decoding the Alphabet Soup

The lab results arrived in his inbox on a Tuesday afternoon. Mark was sitting at his desk, reviewing the Q2 budget proposal, when the notification pinged. He opened it immediately — something about the clinical framing of those results demanded to be checked right away, like he was supposed to understand them — and then he just stared.

ALT: 78 (H) AST: 52 (H) GGT: 61 (H)

Three red H's. High. Like failing grades on a report card that assessed his internal organs.

Mark had no context for these numbers. Were they bad? Were they catastrophic? He knew they weren't normal — the H was pretty clear on that — but he had no intuitive sense of what a normal ALT even was. Was it 30? Was it 50? Was there a world in which 78 was fine because some older, sicker version of himself might have an ALT of 150?

He opened a second browser tab, typing carefully: "normal liver enzyme levels ALT AST."

The results said normal ALT was 7–56 IU/L. His was 78. Elevated by 40% over the high end of normal. He felt something tighten in his chest. Forty percent wasn't a small overage. It wasn't like being two pounds over a healthy BMI. It was a meaningful elevation, and his liver — the organ he'd just spent a week learning wasn't actively dying — had produced that number as evidence of something wrong happening inside it.

He pulled up the full lab report on a second monitor and started writing the numbers down in a notes app, like transcribing them by hand would make them more real:

ALT: 78. AST: 52. GGT: 61. Platelets: 235,000.

The names meant nothing to him. He knew they were liver-related, but in what way? Was ALT the bad one? Was AST worse? Why were there three different enzyme measurements? Why couldn't the liver just have one number, the way the heart had troponin — which he remembered from his mom's health scare a few years back?

His coworker Jake passed by his desk and paused. "You okay? You look like you just got fired."

Mark almost laughed. "My liver enzymes are elevated."

"Shit," Jake said, sitting down unbidden. "That bad?"

"I have no idea. I have numbers and letters, and I feel like I'm supposed to understand if this means I'm going to die, but I actually don't."

Jake leaned in and looked at the screen. "Have you texted your doctor?"

"I have an appointment with the hepatologist next week. I thought I'd just figure it out before then."

Jake raised an eyebrow. "By Googling at your desk?"

"Yeah, well, that's working great so far."

Jake clapped him on the shoulder. "You're going to be fine, man. You're too efficient to die of liver disease. You'd organize it." He left, and the joke lingered in the air for a moment — warm, stupid, exactly what Mark needed.

But after Jake was gone, Mark went back to the notes app. He added a new line at the bottom: What does each enzyme actually measure?

That evening, after dinner and bedtime stories and the slow settling of the house, Mark sat at the kitchen table with his laptop and two hours of quiet. He read medical textbooks via Google Scholar, skimming past the jargon, looking for the one sentence that would make the picture click.

He found it in a hepatology primer: "ALT is the canary in the coal mine."

Unlike AST and GGT, which appeared in multiple tissues and organs throughout the body, ALT — alanine aminotransferase — was liver-specific. It lived primarily in hepatocytes, the actual working cells of the liver. If ALT was elevated, it meant those cells were being damaged, inflamed, or dying. They were leaking their contents into the bloodstream, and the blood test was catching the leak.

AST was different. It lived in the liver too, but also in muscle, heart, kidney, and brain. An elevated AST could mean liver damage — or it could mean you'd had a hard workout yesterday. It was a less specific signal. GGT was even broader, rising in response to chronic inflammation from many sources.

But then Mark read something that made him sit up straighter: "In NAFLD/MASLD, ALT is typically elevated more than AST. When the pattern reverses — AST greater than ALT — it suggests more advanced disease or possible cirrhosis."

His numbers were ALT 78, AST 52. ALT higher. The pattern that indicated his liver was just starting to complain, not failing. In that inversion of expectation — the realization that the pattern of his results actually indicated relative safety — Mark felt something settle in his chest for the first time in days.

The red letters were still red. The numbers were still high. But they were speaking a language he could now partially understand. And in that language, they were saying: inflammation is happening, but not scarring. You're in the window where this changes.

He opened the app he'd been using to track his labs and entered today's values. ALT: 78. AST: 52. GGT: 61. Platelets: 235,000. The app calculated something called an APRI score — AST to Platelet Ratio Index — and showed him he was at low fibrosis risk. Then it asked: "When is your next lab draw?"

Mark typed: "8 weeks."

The app set a reminder and showed him a projected chart titled "Expected Improvement with Lifestyle Change." If he lost 5% of his body weight and started intermittent fasting, the projection showed his ALT dropping to 60 in eight weeks. Sixty. That was inside the normal range.

For the first time since opening the lab results that afternoon, Mark felt something like hope. Not denial — he still had elevated enzymes, a fatty liver, and work to do. But a concrete path from here to better. A trend line he could bend.