Which costs less, Function Health or SiPhox Health?

It depends on how often you test. Function Health costs $365 a year and includes both draws. SiPhox Health charges $99 for the first kit, then $124 plus $25 shipping per renewal. A year therefore costs more as the cadence moves from 6 months to quarterly to monthly.

Does SiPhox Health use needles?

No. SiPhox Health's EasyDraw device collects the sample at your upper arm without needles or a lab visit. Function Health uses a standard venous draw instead. It is a home-based process, whereas Function's draw happens at a partner lab or, in select locations, at home.

Which tests more biomarkers, Function Health or SiPhox Health?

Per draw, Function Health does. Its annual draw lists 116 to 118 biomarkers, urinalysis included. SiPhox Health's kits count 31 biomarkers on Longevity Essentials and 62 on Ultimate 360, with no urinalysis. Function's 160+ lab tests span two draws, and the second repeats about 60 markers from the first.

How fast do Function Health and SiPhox Health results arrive?

Function Health's first results typically start arriving within 48 hours of testing, though its clinician-reviewed plan has no published timeline. SiPhox Health says its lab typically needs 7 to 10 days from receiving the sample, and an email signals when the report is available.

Do Function Health or SiPhox Health sell supplements or prescriptions?

Neither runs a member supplement store. Function Health offers supplement guidance through SuppCo and no prescriptions. SiPhox Health gives supplement recommendations, and its shop sells no supplements. Medication management exists only for Heart and Metabolic Program members, and an independent telehealth provider group, not SiPhox itself, provides it.

Are Function Health and SiPhox Health HSA/FSA eligible?

Yes. Function Health's membership and SiPhox Health's products are both HSA/FSA eligible. SiPhox does not accept insurance, and it will send an itemized receipt for reimbursement if your card is not accepted at checkout. Plan rules vary, so confirm the details with your administrator.

Function Health vs SiPhox Health: Features & Pricing (2026)

Key takeaway:

Function Health ($365/yr) is a biomarker testing membership with 160+ lab tests across two venous draws and a clinician-reviewed action plan. SiPhox Health ($99 first kit, then $124 plus shipping) collects blood at home with a needle-free upper-arm device, one kit per testing period you choose. If you want more than recommendations to carry out alone, Superpower ($199/yr) goes beyond biomarker testing to be a true home for health. A lab draw of 100+ biomarkers comes with the membership, and a marketplace for supplements and compounded prescriptions (like peptides) follows through on what Superpower AI recommends.

What is Function Health, and what is SiPhox Health?

Function Health is a testing membership that runs on a set calendar. It schedules two venous draws a year, returns 160+ lab tests, and follows with a clinician-reviewed plan.

SiPhox Health mails you a collection kit instead. Its EasyDraw device draws a blood sample at your upper arm with no needle, and you choose how often a new kit arrives.

The two part ways at the sample itself. Function sends you to a phlebotomist on a schedule it sets, while SiPhox puts the device in your hands on a schedule you set.

What does Function Health include?

Function Health's $365 membership pays for both yearly draws, a clinician-reviewed analysis and action plan, and a biological age test.

Function's how-it-works page and its pricing page add up to four things in the fee:

Two draws — An annual panel of about 115 biomarkers, then a mid-year redraw that repeats about 60 of them.
Clinician review — Clinicians read your results next to the health history you add, then produce your analysis and action plan.
Biological age — A test derived from Phenotypic Age, run at each draw.
Supplement guidance — SuppCo, now part of Function, links supplement advice to your biomarker data without a member-priced store.

Prescriptions are not offered.

What does SiPhox Health include?

A SiPhox Health membership covers a core panel, a written report, an AI assistant, and two age scores, with extra panels and coaching sold on top.

The membership list reads as follows:

Core panels — Longevity Essentials, Heart & Metabolic, Thyroid Focus, and Hormone Focus are included.
Health report — Insights and an action plan, after expert review of results from a CLIA-certified lab.
Sai — An AI health assistant inside the SiPhox dashboard. SiPhox says Sai is not a medical doctor and cannot give medical advice.
Age scores — BioAge and a Heart & Metabolic Age score.
Coaching — One coaching credit costs $50, listed against $70, and buys either a 30-minute video call or a written plan within 3 to 5 business days.

Supplement recommendations come with the report. SiPhox's shop sells tests, a scan bundle, and coaching, but no supplements.

What biomarkers do Function Health and SiPhox Health measure in 2026?

Function Health quotes 160+ lab tests across two draws. SiPhox Health counts per kit instead, with Longevity Essentials at 31 and Ultimate 360 at 62.

The table sets Function's annual draw beside Ultimate 360, SiPhox's largest panel. Both columns count calculated values next to direct measurements.

	Function Health	SiPhox Health (Ultimate 360)
Initial draw	116-118 biomarkers (102-103 distinct and 14-15 calculated)	62 biomarkers (42 distinct and 20 calculated)
Follow-up draw	Retests ~60 markers already on the annual panel, included	Next kit on the cadence you pick, billed per kit
Headline count	160+ lab tests across two draws	31 on Longevity Essentials, 62 on Ultimate 360

Function's annual draw lists more markers than any single SiPhox kit, and its count includes urinalysis, which no SiPhox panel carries. Function's baseline also carries total omega-3 and lipase.

SiPhox sells its extras as upgrades and add-ons:

Panel upgrades — Ultimate 360 adds $125, and a medication-monitoring panel adds $75 (a testing product, not a prescription).
Blood add-ons — A complete blood count adds $45, IGF-1 adds $70, and the pair adds $100.
Shop tests — Advanced Gut Health Test, 295 Food & Environmental Allergy Panel, Advanced Stress & Sleep Cortisol Test, and a Kidney, Liver, and Lp(a) Panel.

Function lists optional add-ons beyond its included markers on its what-we-test page.

What are the official 2026 membership prices for Function Health and SiPhox Health?

Function Health costs $365 a year, charged annually. SiPhox Health starts at $99 for the first kit. Every kit after it is $124, with $25 shipping added.

The $99 is an introductory price that every new SiPhox member pays once. The plan then renews monthly, quarterly, or every 6 months, so a year holds 2, 4, or 12 kits depending on the cadence you choose.

Function's at-home draw is offered only in select locations, at fees that vary. New York and New Jersey members pay an added state fee at the facility on the day of the draw.

Both companies are HSA/FSA eligible. SiPhox does not accept insurance.

Venous draw or EasyDraw: how the sample gets collected

Function Health collects blood with a standard venous draw. That happens at one of 2,000+ locations, or at home where its concierge service reaches, and a trained phlebotomist handles every sample.

SiPhox Health hands collection to you. Its how-it-works page describes a kit that ships within 3 days and arrives in 3 to 5. You press the EasyDraw device to your upper arm, with live 1:1 support available to guide you. FedEx then collects the sealed sample the same day and carries it overnight to a CLIA-certified lab. Members in Canada use a finger-prick method instead.

If needles or appointment slots are what keep you from testing, SiPhox removes both. If you want someone else to handle a large panel, Function does.

How often can you test?

Function Health builds two draws into the year, with the second already paid for, plus on-demand testing between them.

SiPhox Health leaves the rhythm to you. You pick monthly, quarterly, or every 6 months, and each interval brings another kit at the $124 renewal price, with $25 shipping.

Get 100+ biomarkers tested, in-lab or at home

One membership, one blood draw. Get a full picture of your health and the action plan you need to improve it.

Book your test

Get 100+ biomarkers tested, in-lab or at home

One membership, one blood draw. Get a full picture of your health and the action plan you need to improve it.

Book your test

How fast do results arrive, and who reads them?

Function Health says first results typically start arriving within 48 hours of testing. The clinician-reviewed analysis and action plan follows, and Function publishes no turnaround for it. Reviewers report waits of three to four weeks.

SiPhox Health reports results 7 to 10 days after your sample reaches the lab, announced by email once the report is ready. The report arrives with insights and an action plan, which SiPhox says go through standard CLIA analysis overseen by medical experts before they are personalized.

Function members then work from the clinician-reviewed plan. SiPhox members can ask Sai questions, or buy a coaching credit for a human conversation.

Who is Function Health best for, and who is SiPhox Health best for?

Function Health is best for:

Members who prefer a set pair of draws, both covered by the one fee
People comfortable with a venous draw at a lab
People who want first results within 48 hours of testing

SiPhox Health is best for:

People who would rather skip needles and lab visits
People who want to choose their own testing cadence
People who want an AI assistant for questions between tests

The bottom line

Function Health is the steadier choice, with two scheduled draws, 160+ lab tests, and a clinician-reviewed plan inside one $365 fee. SiPhox Health is the more flexible one, with a needle-free kit on a monthly, quarterly, or 6-month cadence, at $124 plus shipping after the first.

Neither membership sells the supplements its recommendations name. Function's SuppCo ties supplement advice to your data but runs no member-priced store, and it offers no prescriptions. SiPhox lists supplement recommendations, its shop sells none, and prescribing sits with an independent provider group serving one program.

Superpower costs $199 a year to Function's $365, the lower of the two, and that fee covers one draw of 100+ biomarkers. Those results and your wearable data from Apple Health, Whoop, Oura, and more all feed Superpower AI, which writes your Superpower Protocol and provides health coaching as the numbers change. The marketplace carries supplements at up to 20% off for members, and prescriptions are available there when clinically appropriate, priced separately. A digital twin shows how your markers move over time. Superpower says 93% of members found their action plan more useful, even life-changing, than a yearly checkup.

Blood work is where a health plan starts, not where it ends. Build your home for health with Superpower today.