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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All Early Detection Function News Male and Female Health Nutrition and Lifestyle Podcasts and News Stress and Aging

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.

Illustrated grid of pink birth control pills.

Male and Female Health

Do birth control pills increase cancer risk?

Lauren and her fiancé outdoors on their wedding day.

Nutrition and Lifestyle

It wasn't a lack of discipline. It was signs of insulin resistance.

Your favorite AI tools: Better with Function

Your favorite AI tools: Better with Function

Why cancer stage matters for treatment and survival

Early Detection

Why cancer stage matters—and how to look for early signs

Ovarian cancer symptoms and early detection

Male and Female HealthEarly Detection

Ovarian cancer: Why it's hard to find and what to watch for

Lifestyle factors and ovarian cancer risk

Male and Female HealthNutrition and Lifestyle

What affects ovarian cancer risk? Here's what you can—and can't—control.

Low-dose lung CT screening

Early Detection

Lung CT screening: What it is, who it's for, and why it matters

Chris after major weight loss and lifestyle changes

Early DetectionStress and Aging

He lived with pain for decades. Then an autoimmunity test changed everything.

Mario outdoors after his Function imaging journey

Early Detection

He never expected a kidney tumor. An MRI found signs.

Mason balancing on a winners podium with his arm in a sling after a shoulder injury

Early DetectionStress and Aging

His inflammation kept rising. The answer was in his house.

Life is short?

We disagree.

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