Want to Live 100 Healthy Years?

Often, medical help only kicks in once symptoms appear—when chronic pain keeps you off your bike or inflammation sidelines you from running. But waiting for problems to surface isn’t the best path to a healthy, fulfilling life. That’s why Mark Hyman, MD, has spent decades redefining how we think about both the quality and length of our lives, championing a proactive approach to care.

As co-founder of Function, Dr. Hyman is empowering people to take ownership of their health with access to more than 160 advanced lab tests, along with MRI and CT scans powered by FDA-cleared AI. Dr. Hyman is on a mission to remove complexity, put advanced health technology directly in your hands, and make privacy a cornerstone of the experience. “Function exists to help make 100 healthy years a reality,” he says. “You deserve to understand what’s going on in your body and spend more time with the people you love.”

Here, Dr. Hyman shares his candid perspective on what’s missing in today’s system, why deeper insight into your body truly matters, and how Function brings all your health data together—paired with leading medical and research expertise—for just $1 a day.

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Outside: What inspired you to help create Function?

Dr. Hyman: We’ve all experienced the gaps in traditional healthcare—the long waits, the dismissals, the reactive model that only responds to symptoms. Function takes a better approach with the world’s top doctors to put you in control. The foundation of care at Function is the early detection of potential issues, when you can still do something about them. Function tests for early indicators related to heart health, hormone balance, and nutrient levels, including:

• Elevated ApoB or hs-CRP: May impair stamina, recovery, and overall cardiovascular resilience.
• Thyroid dysfunction: Can affect energy levels, temperature regulation, and metabolic efficiency.
• Nutrient deficiencies: Low iron, B12, or vitamin D can drain energy, reduce endurance, and weaken bones and muscles.
• Cortisol imbalance: May lead to chronic stress, impaired performance, slower recovery, and reduced immune resilience.
• Blood sugar dysregulation: Can cause energy crashes, inflammation, and inconsistent performance.
• Systemic inflammation: May contribute to joint issues, slower recovery, and compromised immune function.
• Kidney or liver strain: These organs are essential for detoxification and metabolic regulation, especially under physical stress.
• Electrolyte imbalances: Sodium, potassium, and magnesium are critical for hydration, muscle function, and endurance.

What does Function offer that other providers overlook?

Function doesn’t replace your doctor, but it does make you a more informed patient. Traditional healthcare is built around acute treatment, leaving significant gaps in the data and not providing the comprehensive solutions people actually need. Nearly 40 percent of premature deaths are caused by preventable diseases, yet most individuals still lack access to actionable health information. Despite having more health data than ever, patients often don’t get the clear, personalized next steps they need.

Function is creating a new standard of proactive health, enabling people to monitor thousands of potential disease pathways. Unlike the typical annual physical, which includes about 26 lab tests, Function members receive more than 160 tests twice a year—covering heart health, hormones, thyroid, liver and kidney function, heavy metals, nutrients, inflammation, cancer signals, and more—for $365 per year, or $1 a day. Getting tested is easy at one of the 2,000-plus participating labs across the United States. If something requires attention, you’ll know early, often years before symptoms appear.

Why did Function reduce its membership price?

Owning your health shouldn’t be a luxury. And our mission has always been to make expert-level insights accessible. That’s why, as Function has grown, we’ve used our scale to lower costs without lowering quality. You still get access to the same essential tests, science-backed insights, and clinical expertise. We didn’t cut a single test, offering, or piece of functionality.

How does Function help people take control of their long-term health?

The earlier you understand your biology, the more control you have over your health trajectory. Most chronic diseases are preventable, but you can’t improve what you don’t measure. Function gives people a way to get ahead, long before symptoms show up.

With Function, you’ll receive a comprehensive baseline of your health and your potential risks. We’ll equip you with detailed test results and clear, actionable next steps, including nutrition, lifestyle, and supplement recommendations. You won’t just get numbers—you’ll get detailed insights reviewed by a licensed clinician so you understand what’s worth your attention. All your data is accessible through our secure interface, giving you a personalized view of your health and empowering you to make confidently informed decisions.

What do you hope Function changes about health?

I hope we shift the culture from “wait and see” to “test and act.” When we do, we redefine health, not as the mere absence of disease, but as something you can build, maintain, and protect throughout your life. Function is proving that this change is possible: We don’t have to wait, and personalized health data can be far more accessible.

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Function is an all-in-one health platform that gives members access to 160-plus yearly lab tests—five times more than a typical annual physical—covering everything from hormones to nutrition and heart health, plus actionable insights from top doctors. Members can also add on advanced MRI and CT scans that could detect hundreds of potential conditions in up to 13 organs. All results are stored in one place, making it easy to spot trends, track progress, and take action.