Affordable, Comprehensive Functional Testing

While Functional Nutrition recognizes that lab tests are just a snapshot in time—and there’s plenty we can do to support healing without them—testing still plays a valuable role, especially when it comes to tracking your progress over time. That’s why I use and recommend Function Health: it offers the most comprehensive, affordable, and user-friendly functional lab testing and tracking available today.

Why choose Function Health?

• 100+ lab tests, twice a year. Test hormones, metabolism, inflammation, detox capacity, micronutrients, and more—including many markers not typically included in standard annual labs.

• Personalized insights from leading clinicians. Your results are reviewed and interpreted by top functional medicine doctors. you’ll receive a clinician’s summary that’s clear, actionable, and tailored to you.

• Long-term results tracking. All of your lab data is securely stored and easy to compare over time—helping you connect the dots and see how your nutrition and lifestyle changes are impacting your health.

• Convenient access to 2,000+ testing centers nationwide. Complete your bloodwork at a lab near you—no long waits or special referrals needed.

• Incredible value: $15,000+ of testing for the cost of a plane ticket. For just $499/year, you’ll get twice-yearly testing, full lab access, and professional interpretation—an unmatched value. it’s also FSA/HSA eligible.

Support our mission—use our code

When you sign up, enter referral code DBARRINGTON10 at checkout.

This small step directly supports the free content, resources, and education we create here at Peak Functional Health. We don’t receive affiliate credit automatically—so entering the code is the only way to ensure your purchase helps sustain our mission.

Thank you in advance for being part of this community and helping us continue to empower others with accessible health tools.

*By clicking the link, you’ll be directed to an external website. Peak Functional Health is not responsible for any changes to Function Health’s offerings, pricing, terms, or policies. We recommend reviewing their site carefully before purchasing. We share this referral based on personal experience and do not manage or oversee the services provided.