Function Journal

Nutrition and Lifestyle

When caregiving ends, your health still matters

Nutrition and Lifestyle

A phlebotomist’s guide to an easier blood draw

Stress and Aging

Stress is aging you faster than you think—here’s how to slow it down

Early Detection

Aging backwards: How to measure, slow, or reverse your biological age

Woman training in a gym for the women's lab testing article.

Nutrition and Lifestyle

10 lab tests women should track when strength training

You track your reps and your progress. These lab tests track what powers them — from iron stores and stress hormones to metabolic and recovery markers.

Two people embracing, with one person's arms wrapped around another's waist.

Male and Female Health

Progesterone: Why it matters and how to test with Function

Man outdoors for the male fertility testing article.

Male and Female Health

Decoding Male Reproductive Health and The Fertility Testing Playbook

Close-up of a person's neck and collarbones against a dark background.

Early Detection

The hidden epidemic: Why thyroid disorders often go undiagnosed

Person swimming underwater in an orange top with arms extended forward.

Male and Female Health

Is It Infertility–Or a Hormonal Imbalance You Can Fix?

Member story

What started as a diagnosis became a turning point

Geoff thought he was in great health until one prostate marker flagged through Function changed everything.

Read Geoff’s story

An image of Geoff talking to the camera.

Function like Geoff

Dr. Mark Hyman during his Bari Weiss podcast feature.

Nutrition and Lifestyle

Dr. Mark Hyman x Honestly with Bari Weiss: How to Live Your Healthiest Life

Dr. Mark Hyman joins Bari Weiss to explore how food, toxins, and functional medicine are shaping America's health crisis—and how we can fix it.

Dr. Mark Hyman during his Huberman Lab podcast feature.

Nutrition and Lifestyle

Dr. Mark Hyman x Huberman Lab: How to Improve Your Vitality & Heal From Disease

Fernando during his Function story feature.

Nutrition and Lifestyle

Turning 30—and taking charge

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Sara and Tré smiling at each other while seated in their living room.

Male and Female HealthNutrition and Lifestyle

They won $250,000 and a clearer picture of their health

Placeholder — replace with MRI with Spine article hero image

Early Detection

MRI with Spine: What it checks for and why it matters

Tanner holding his young daughter outdoors by a river.

Early Detection

His PSA kept rising. At 35, Tanner pushed for a biopsy.

Mitchell and his wife taking a selfie on a coastal overlook.

Early Detection

His result: “Cancer signal detected.”

Sarah speaking on stage at a George Washington University Analytics Academy event.

Early Detection

She had chest pain at 40. Function helped her find the cause.

Two side-by-side axial brain MRI scans with a warm brown-orange tint and grainy texture. The left scan shows bright white tissue, and the right shows darker tissue with bright white fluid-filled spaces.

Early Detection

Why Function's MRIs are contrast-free by design.

Male and Female Health

PSA and prostate health: A deep dive

MRI brain scan card reading “Unremarkable,” overlaid on a softly lit photo of a person’s neck and shoulder.

Early Detection

Why should I get an MRI when I have no symptoms?

Your favorite AI tools: Better with Function

Your favorite AI tools: Better with Function

JP and his father smiling at a soccer stadium in Argentina jerseys

Early Detection

He had no symptoms. His heart biomarkers helped him look closer.

Function result card for Prostate Specific Antigen (PSA), Total, showing an in-range value of 0.9.

Male and Female HealthEarly Detection

Going in-depth on PSA

Jaclyn stands barefoot in a sunlit doorway framed by climbing greenery, looking over her shoulder and smiling.

Early Detection

This doctor survived breast cancer. It changed her practice.

Life is short?

We disagree.

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