Function Health vs Parsley Health

Function Health vs Parsley Health: these solve different problems, so the better choice depends on what you want. Function Health ($365/year) is comprehensive biomarker testing with 100+ markers and not much else. Parsley Health (its Complete Care membership runs $150/month if Parsley is in-network with your insurance, or $275/month out of network) is a full functional medicine membership: 60-80+ biomarkers plus ongoing clinician access, health coaching, nutrition plans, and prescriptions. If you mainly want the labs, Function is the value pick. If you want a doctor managing a chronic condition, Parsley is doing far more.

I've personally tested Function Health and worked through its full results experience, and I reviewed Parsley Health's membership and panel details on their own website. This page lays out where the two actually differ so you don't pay for features you won't use.

Below I compare them on pricing, the lab tests included, and which one is the better fit for different goals. For the membership on its own, see our Parsley Health review.

Function vs Parsley Health comparison table

Where Function is stronger than Parsley

• Far lower price: At $365/year, Function costs less than two months of Parsley Complete Care, and tests more biomarkers.
• More comprehensive biomarker panel: Function includes 100+ biomarkers vs Parsley's 80, with specialized markers like omega fatty acids, advanced lipid particles, and heavy metals
• Focus on testing: If you primarily want detailed biomarker data without the full medical membership, Function is more targeted
• Polished data visualization: Function Health's app provides detailed explanations and tracking for all biomarkers

Where Parsley is stronger than Function

• Full medical membership: Parsley includes ongoing access to functional medicine clinicians, coaching, and care management, not just testing.
• Prescription capabilities: Parsley clinicians can prescribe medications and supplements as part of your treatment plan
• Root-cause approach: Parsley focuses on functional medicine principles to address underlying health issues, which can be good for people with complex chronic illnesses (POTS, ME/CFS, etc).

Function vs Parsley Health pricing

Function Health is $365/year for the testing membership. Parsley Health's Complete Care membership is $150/month if Parsley is in-network with your insurance, or $275/month out of network, roughly $1,800 to $3,300/year. That buys far more than labs: ongoing clinician visits, coaching, nutrition plans, and prescriptions. They aren't really priced against each other, since one is a lab service and the other is a care membership that happens to include testing.

Function vs Parsley Health: which is better?

If you primarily want a broad, affordable biomarker panel you can track over time, Function Health is the better value. If you want a clinician actively managing your care, especially for a complex or chronic condition, Parsley Health does much more for the higher price. Choose based on whether you're buying data or buying ongoing care.