Function Health Review

Function Health is a US blood-testing subscription. Its website describes a membership with 160+ lab tests, doctor-reviewed explanations and a personalized action plan. Categories include hormones and thyroid, heart and metabolic health, aging, mental health and focus, and cancer and other silent risks.

In practice you give blood at 2,000+ Quest sites or have a specialist come to your home or office, and the FAQ says first results typically arrive within 48 hours. Clinicians review and flag issues, and the app lists next steps. It also has private AI chat, wearable connections, past-record uploads and optional MRI and CT. The terms say Function does not provide medical advice or diagnosis and does not create a doctor-patient relationship with you.

The list price is $365/year. According to Pulse 2.0 this was cut from $499 when the company announced a $298 million Series B at a $2.5 billion valuation in November 2025, alongside the Ezra acquisition that adds MRI and CT. Refund terms are strict: a full refund only within 48 hours and before any specimen is collected. Add-on tests and MRI/CT cost extra and are not priced on the pricing page.

It fits US residents who want one broad panel rather than buying individual tests or going through insurance. Note that Function is not yet offered in Rhode Island, Hawai'i or Puerto Rico. Some comparison write-ups argue that broad screening of people without symptoms can cause false positives and unnecessary follow-up; these are often affiliate pages, so treat them as opinion. For wearable users such as Oura or Whoop owners, Function adds blood data rather than replacing daily tracking.