Updated October 15, 2026. By FitScript Editorial.
Function Health and Lifeforce both turn blood testing into a health plan, but they are built differently. Function Health sells a yearly membership with twice-yearly testing included. Lifeforce sells a clinician-led membership with regular blood draws, telehealth consults and a health coach built in. FitScript publishes this page and is shown alongside them as a third option built around reading the labs you already have. Every fact below is linked to where it came from.
FitScript publishes this comparison and is one of the services compared. Competitor facts come from each company's own website as of October 15, 2026. Prices and features change, so check their current terms before you decide.
| Topic | Function Health | Lifeforce | FitScript |
|---|---|---|---|
| Price | $365 per year, charged annually. Function notes that membership renews at the then-current price. [6] | Monthly Membership $199 to start, then $149 per month. Core Annual Membership $599 one time. [7] | Protocol $20 per month including a 7-day trial, cancel anytime. Peak $99 per month or $999 per year, adding provider access and two group coaching calls a week. [1] |
| Lab testing | 160+ lab tests a year, with 100+ at the annual visit and 60+ at a mid-year retest. [8] | 50+ biomarkers per draw, 4 times a year on the Monthly Membership or twice a year on Core. [7] | Panels priced one at a time, from $49 to $499. Up to 149 biomarkers across 11 systems, read against optimal ranges. [2] |
| Where you test | 2,000+ Quest labs in 48 states, or an at-home draw with a licensed specialist. [8] | An at-home draw by a phlebotomist, or a walk-in visit at a Quest location. [9] | A digital requisition valid at 3,000+ Quest and Labcorp locations, or at-home phlebotomy in select areas. [5] |
| Results timing | First results typically arrive within 48 hours of testing. [8] | Typically within 10 to 14 business days of the blood draw. [10] | 3 to 5 business days for FitScript Essential, up to 7 to 10 for Heavy Metals. [5] |
| Clinician and AI support | Clinicians review every result. Members can connect Function to AI partners such as ChatGPT, Claude and Perplexity. [8] | 45-minute clinician telehealth visits, a health coach and access to prescription medications. [7] | Atlas, the AI that reads your labs, on every plan. Peak adds provider access and two group coaching calls a week. [1] |
| Labs from elsewhere | Upload results from your doctor to track them in one place. [8] | External lab work can be uploaded when your Lifeforce clinician asks for it. [11] | Upload PDFs or photos of lab reports from Quest, Labcorp, other testing services or your doctor. [3] |
| HSA and FSA | Listed as HSA/FSA eligible. [6] | All plans listed as HSA/FSA eligible, with reimbursement support through Truemed. [7] | Each lab panel page lists the panel as HSA/FSA eligible. [5] |
Function lists one membership at $365 per year, charged annually, which it also expresses as $1 a day. Its pricing page states that the membership renews at the then-current price, and its FAQ notes that testing in New York and New Jersey can cost more because of state regulations. The membership covers 160+ lab tests a year, clinician review of every result, a personalised protocol and member pricing on MRI and CT scans. Function is insurance-free and provides an itemised receipt for HSA or FSA reimbursement.
On flexibility, Function states that members can cancel and rejoin at any time.
Lifeforce lists two ways to start. The Monthly Membership is $199 to start, shown as down from $349, then $149 per month, cancel anytime. It includes an at-home blood draw of 50+ biomarkers four times a year, four clinical consults a year to go over the results, access to prescription medications, unlimited health coaching, 30 percent off supplements and access to advanced panels and select peptides. The Core Annual Membership is a one-time $599, shown as down from $699, with two blood draws a year, one clinical consult a year, access to prescription medications, a personalised health program and 30 percent off supplements. Lifeforce also lists an annual option at $1,449 that includes everything in the Monthly Membership.
Lifeforce lists all plans as HSA/FSA eligible, and its help centre explains that most plans need an itemised invoice and a letter of medical necessity, which it arranges through Truemed. Members can cancel from the Orders and Subscriptions page of the member portal.
Function splits its 160+ yearly tests into two visits. The Annual Test covers 100+ biomarkers, and the Mid-Year Test covers 60+ biomarkers to track change, which Function says must be used before the annual renewal. Its published menu runs across heart, thyroid, hormones, metabolic health, liver, kidneys, nutrients, environmental toxins and autoimmunity, and includes markers such as ApoB, lipoprotein(a), LDL particle number, omega-3 levels and heavy metals such as mercury.
Function also lists practical details. Members fast for 8 hours and avoid seafood for 48 hours before heavy metal tests. Some members need two visits, for example people with an active menstrual cycle, so hormones are drawn at the right time, and members in Arizona because of state processing rules. Function is open to adults 18 and over who are not currently pregnant.
Lifeforce measures 50+ biomarkers per draw, grouped into hormone balance, critical nutrients, metabolic condition, organ health, cardiovascular health and other key risk factors. On the Monthly Membership the panel is repeated every quarter, and Lifeforce's how-it-works page describes retesting each quarter to track progress and refine the plan.
Lifeforce's help centre lists four optional add-on panels, heavy metals, metabolic, cardiovascular and brain protection, which can be added to a member's next draw alongside the standard 50+ biomarker panel.
Sources [8] [14] [7] [15] [16]
Lifeforce sends a licensed phlebotomist to your home or office for the draw, and its help centre explains that members can switch to a walk-in visit at a Quest Diagnostics location, where most sites accept walk-ins without an appointment. Lifeforce states that its services are offered in the 48 contiguous US states and require a US shipping and billing address.
Lifeforce asks members to fast for 10 hours before a draw and to avoid alcohol, aspirin and niacin for 24 hours. For draws that include advanced panels, it notes that 8 to 15 tubes are drawn, so good hydration matters.
Sources [17] [9] [18] [19] [20]
Function states that the first batch of results typically starts arriving within 48 hours of testing. Each result comes with explanations written by doctors, action items and a clinician's full summary, and Function says a healthcare provider will call right away if a result is critical. Members can download results as a PDF to share with their own doctor.
Lifeforce states that results are typically ready within 10 to 14 business days of the blood draw. Its algorithm then calculates a Lifescore, a single 0 to 100 measure that Lifeforce says reflects baseline health, quality of life and biological age, and a Lifeforce clinician reviews the results with your health questionnaire. Lifeforce says the initial review loads into the member portal within 48 hours of the lab returning results, ahead of the telehealth consult.
Function states that clinicians review every result and flag issues. For AI, members can stay in Function's Private AI Chat or securely connect their results and clinician notes to vetted partners including ChatGPT, Claude and Perplexity. Questions about membership or results go through member chat, and Function describes its service as deeper insight to use alongside your existing care.
Clinicians are the core of Lifeforce. Each membership includes 45-minute telehealth consults with a board-certified longevity medicine clinician to review results and build a plan, which can include supplements, hormones, peptides, pharmaceuticals and lifestyle strategies where the clinician finds them appropriate. Members are matched with a dedicated health coach, and Lifeforce lists monthly deliveries of supplements and prescriptions. Lifeforce states that clinical services are provided by independently owned medical practices.
Function lets members connect supported apps under Connected Apps to sync their health data, and invites members to upload results from their own doctor so everything is tracked in one place over time.
Lifeforce asks members to integrate the wearables they use during onboarding. For outside labs, its help centre asks members to mention external lab work in their telehealth appointment, and the clinician decides whether uploading it would help and explains how.
If you want scheduled one-on-one clinician time built in, a clinician-led membership is designed for that. If you mainly want labs read and a plan written, with clinicians available when needed, a reading membership may be the smaller cost. Prices change, so check each company's current pricing before you decide.
Sources [7]
Function offers a large amount of testing for one published yearly price, with two scheduled draws so members can see change over a year. Its site lists 2,000+ Quest labs in 48 states, an at-home draw option, first results typically within 48 hours and clinician review of every result. Members who want imaging can add an annual MRI.
For people who want a broad, recurring panel managed for them and like having clinicians review the results, that structure is easy to follow.
Lifeforce puts clinicians and coaching at the centre of the membership. Its site lists 45-minute consults with board-certified clinicians, a dedicated health coach, quarterly retesting on the Monthly Membership and prescription access when a clinician recommends it, with draws done at home so there is no waiting room.
For people who want a care team to read their results, build the plan and adjust it every few months, with coaching to help them follow through, that structure is easy to understand.
Function is a good fit for someone who wants a broad panel twice a year, with clinician review of every result, the option of an at-home draw and member access to MRI and CT. Its scheduled mid-year retest suits people who want to see change within a year without planning it themselves.
Lifeforce is a good fit for someone who wants a clinician-led program, with at-home draws, regular one-on-one consults, a dedicated health coach and access to prescriptions and supplements through the same membership.
FitScript publishes this page and is shown in the table as a third option. It is built around reading the labs you already have rather than around one fixed testing bundle. Protocol is $20 per month including a 7-day trial and covers Atlas, its AI, the Health Score and personalised recommendations on uploaded labs. Lab panels are sold one body system at a time, from $49 for a single test to $499 for FitScript Complete, and Peak adds provider access and two group coaching calls a week.
Its upload page accepts PDF reports from Quest, Labcorp, other testing services and hospital systems, as well as phone photos of paper printouts, and states that Atlas has a read in under a minute. So results from either service compared here can be uploaded and read against optimal ranges.
See Upload your labs, FitScript pricing, FitScript Essential
Start with the tests you actually want. A large biomarker count is useful when it covers the systems you care about, such as thyroid, hormones, heart, liver and kidney health. Read each provider's published list and look for the specific markers you have been told to watch, for example ApoB, fasting insulin or free T3, rather than comparing totals alone.
Next, think about how often you will retest. Seeing a number move after three or six months is often more useful than a single snapshot, so include the cost of a second draw in any yearly total. Check where you can be drawn, how long results take and whether a clinician reviews anything outside the standard range.
Finally, look at what happens after the results arrive. Some people want a clear written plan, some want to ask questions about their own numbers, and some want a licensed provider involved. Membership terms, renewal pricing and HSA or FSA eligibility are worth reading closely too, since they change over time.
Choose based on what you need most. Function Health sells a yearly membership with twice-yearly testing included. Lifeforce sells a clinician-led membership with regular blood draws, telehealth consults and a health coach built in. Read each company's current terms, since prices and features change.
Whatever you choose, a licensed clinician is the right person to interpret results that fall outside the standard range and to decide on any treatment.
As listed on Function Health's own site on the date shown on this page. $365 per year, charged annually. Function notes that membership renews at the then-current price. Check Function Health's current terms, since prices and features change.
As listed on Function Health's own site on the date shown on this page. First results typically arrive within 48 hours of testing. Check Function Health's current terms, since prices and features change.
As listed on Function Health's own site on the date shown on this page. 2,000+ Quest labs in 48 states, or an at-home draw with a licensed specialist. Check Function Health's current terms, since prices and features change.
As listed on Lifeforce's own site on the date shown on this page. Monthly Membership $199 to start, then $149 per month. Core Annual Membership $599 one time. Check Lifeforce's current terms, since prices and features change.
As listed on Lifeforce's own site on the date shown on this page. Typically within 10 to 14 business days of the blood draw. Check Lifeforce's current terms, since prices and features change.
As listed on Lifeforce's own site on the date shown on this page. An at-home draw by a phlebotomist, or a walk-in visit at a Quest location. Check Lifeforce's current terms, since prices and features change.
Atlas is FitScript's AI. It reads every marker against optimal ranges as well as the standard range, builds a daily protocol and answers follow-up questions about your own results. The FitScore is one score built from your results, tracked over time.
Many people retest a panel after about three months to see whether changes in sleep, training or diet have moved the numbers, then every six to twelve months once results are steady. A clinician can suggest a schedule based on your own results.
No. FitScript publishes it and is one of the services compared. Every competitor fact links to that company's own site and shows the date we read it, so you can check anything that may have changed.
Function Health and Lifeforce are trademarks of their respective owners. FitScript is not affiliated with or endorsed by Function Health and Lifeforce.