Blood Testing for Gyms: How to Offer Lab Work to Your Members

A gym can offer blood testing by selling lab tests to members through a gym-branded storefront while a licensed provider orders each test and Labcorp runs it. The member buys the test from the gym, gives a sample at a Labcorp patient service center or, from December 1, 2026, with an at-home kit, and gets the Labcorp report in a portal with the gym’s name on it. The gym needs no medical license, no phlebotomist and no website build.

This guide covers why gyms add testing, which panels fit which members, how a test runs day to day, what trainers can and can’t say about results, how to price it, a sample 90-day retest program, and how labs lead into TRT, HRT and GLP-1 programs under the same brand. For the general business model, see our main guide on how to start a lab testing business.

Why Are Gyms Adding Blood Testing?

Gyms add blood testing for three reasons: it gives members a reason to stay, it measures progress the scale can’t show, and it adds a revenue line that doesn’t depend on more square footage.

Retention. Losing members is the default in this industry. The Health & Fitness Association’s 2025 Fitness Industry Benchmarking Report, drawn from 175 companies and more than 17,000 facilities, found member retention averaged 66.4% for 2024. Roughly one member in three left within the year. A retest on the calendar gives a member a dated reason to still be training in three months.

Progress beyond the scale. Many members train for months and judge the result by body weight alone. A blood test adds numbers they can track over time, such as A1c, lipids or vitamin D. The CDC estimates 115.2 million US adults have prediabetes and that 27.6% of adults with diabetes are undiagnosed, which is why A1c is one of the most useful markers a member can check.

A new revenue line. A gym earns from memberships, personal training and maybe supplements. Lab testing adds a product with a set margin per order and a natural repeat purchase. It also sits at the top end of the market: Equinox partnered with Function Health in 2024 to put 100 lab tests inside a membership priced at $40,000 a year. A neighborhood gym can offer a much simpler version at a price its members will actually pay.

Which Blood Tests Fit Gym Members?

The panels that fit gym members are the ones tied to why they train: hormones for strength and energy, metabolic markers and lipids for weight loss and heart health, thyroid for unexplained fatigue or stalled progress, vitamin D for general health, and iron with ferritin for endurance athletes.

Iron deserves a closer look if you coach endurance athletes. In a 2022 study of highly trained, non-professional female endurance athletes, 6 of 13 (46%) had ferritin below 30 µg/L, the cutoff the authors used for iron deficiency. The authors noted that non-professional athletes get less nutrition support than professionals, which describes most of the endurance athletes at a gym.

You don’t need every panel at launch. On Karpa you can build custom panels in the partner portal, so a gym might start with a “Strength Baseline” (hormones plus metabolic) and an “Endurance Check” (iron plus vitamin D) and add more later. For a deeper look at building a panel menu, see our guide to starting a lab testing business.

How Does Blood Testing Work Day to Day at a Gym?

Day to day, the gym sells the test and the rest runs without the gym touching a needle or a lab order. Here is the sequence on Karpa’s diagnostic labs storefront:

1. The member buys the test under your gym’s brand, from a QR code at the front desk, a link in an email or your app. Karpa can host the storefront, add its lab checkout to your own website, or connect to your gym’s app through its API.
2. The member fills out the intake form in the storefront.
3. A licensed provider orders the test. A provider in Karpa’s independent network places the order. Your staff never order labs.
4. The member gives a sample in one of two ways. They can walk in or book a time at a Labcorp patient service center (Labcorp runs 2,200+ locations), or, from December 1, 2026, they can use a branded at-home collection kit.
5. Labcorp runs the test and the Labcorp report lands in the member’s branded portal.
6. You see the order in your partner portal, which shows revenue, orders, lab results, custom panels and discount codes. Payment settles to your own Stripe account.

Results are not reviewed by a provider by default. A provider looks at results only if the member books a TRT or HRT consult. Tell members this plainly at checkout so they know to take their report to their own doctor with any questions.

Karpa’s lab storefront is available in 47 states plus Washington DC. It is not available in Hawaii, Maine or North Dakota, where Labcorp has no patient service center.

Walk-in lab or at-home kit?

For a fuller comparison of collection methods, including Tasso devices and finger-prick cards, see Tasso vs finger prick vs lab draw.

What Can Trainers Say About Blood Test Results?

Trainers can talk about training and can encourage members to retest, but they cannot diagnose, interpret a result or recommend treatment based on a lab value. Interpreting lab results is clinical work, and it sits outside a personal trainer’s scope of practice. Ordering the test is also clinical, which is why a licensed provider orders every test. Who can order labs varies by state; our guide to who can order lab tests covers the rules.

The line is easier to hold when staff have a script:

A good default line for any question about a number: “That’s a great question for your doctor. Bring the report to your next visit, and we’ll keep working on your training here.”

Treat results as private. Your partner portal shows lab results, so set a rule that only staff who need to see an order can open it, and never post a member’s numbers in a group chat, on a leaderboard or in marketing without their written consent. Our HIPAA guide for cash-pay programs covers data handling in more depth.

How Should a Gym Price Blood Testing?

Gyms usually price blood testing in one of three ways: as a one-off purchase, bundled into a premium membership tier, or as a quarterly retest subscription. On Karpa, you set the retail price. Partners typically charge $50 to $200+ per order and aim for around a 50% margin per order.

For a price check, Labcorp OnDemand’s consumer site listed a comprehensive testosterone test at $159, a men’s or women’s health test at $219 and a custom thyroid test at $247 as of November 2026. Your members are paying for convenience and for a gym they already trust, so you don’t have to be the cheapest option. Our guide on how much to charge for lab tests goes through the math.

Quarterly retests with white-labeled Tasso devices

The quarterly model is where at-home collection pays off. Starting December 1, 2026, above a minimum order quantity, Tasso at-home collection devices can be white-labeled under your gym’s brand and sold as a subscription, such as a retest every quarter. The member gets a kit with your logo, collects at home and mails it in, and you get recurring revenue without anyone booking a lab visit.

A worked example

These numbers are illustrative; use your own. Say you price a hormone and metabolic panel at $150 and keep around 50%, or $75 per order. If 40 members sign up for quarterly retests, that is 160 orders a year and about $12,000 in margin, before counting one-off tests or members who later join a prescription program.

A Sample 90-Day Retest Program

A 90-day program gives members a start date, a midpoint and a finish line with a second test, which is what turns a one-off purchase into a habit. Here is a simple version a gym can run alongside a training challenge or a new personal training package.

Two details make the program work. First, use the same panel at baseline and retest so the member compares like with like. Second, sell the retest at the start, either as part of the package or as a subscription, so the week 12 test is already paid for.

During the program the trainer coaches training and the member owns their results. If a member wants help with what their numbers mean, that goes to their own doctor, or to a licensed provider through a consult if the gym offers a prescription program.

How Do Labs Lead to TRT, HRT and GLP-1 Programs at a Gym?

Labs are a natural entry point to prescription programs, because a member who checks testosterone, thyroid, A1c or lipids is often the next TRT, HRT or GLP-1 patient. On Karpa the same gym can add prescription telehealth programs under the same brand once its lab storefront is running.

• TRT. A man who tested his testosterone can book a TRT consult, and a licensed provider then looks at his results as part of that consult. See the TRT brand guide.
• HRT. Women in perimenopause or menopause who tested hormones can move into an HRT program. See how to launch an HRT telehealth brand.
• GLP-1 weight loss. A weight loss member who has been tracking A1c and lipids may ask about medication. The provider decides eligibility.
• Peptides. Recovery and performance members often ask about peptide therapy. Our guide for gym owners launching a peptide telehealth clinic covers that program in detail.

Karpa powers 50+ telehealth brands, and in each one the partner owns the brand and the customer relationship. Starting with labs lets a gym see how many members buy a health product before it commits to a prescription program.

Which Lab Testing Companies Work for Gyms?

A gym owner or personal trainer cannot order lab tests, so a gym needs a lab testing company whose own physicians or providers order each test. Several do, and four of them sell testing under the gym’s brand without an enterprise contract or an engineering team: Choose Health, Karpa Health, SiPhox Health and Spot Dx. The right one depends on how members will give a sample and where they will buy.

Evexia Diagnostics, Fullscript Labs (formerly Rupa Health) and Vibrant Wellness are built for licensed practitioners. Evexia’s physician network does let non-licensed practitioners such as health coaches order outside New York, New Jersey and Rhode Island, but it is not a storefront under the gym’s brand. Karpa is not the right fit for a gym that needs at-home kits before December 1, 2026, or whose members live in Hawaii, Maine or North Dakota. The full comparison is in our list of white label lab testing companies, with head-to-head pages for Choose Health, SiPhox Health and Spot Dx.

How to Launch Blood Testing at Your Gym

1. Pick one starter panel per member goal. Two or three panels are enough to launch, using the table above.
2. Set your prices and your model. One-off, premium tier or quarterly retest subscription.
3. Launch your gym-branded lab storefront. On Karpa you supply your brand and connect Stripe; Karpa runs the storefront, intake form and partner portal. No website build, medical license or LegitScript certification is needed for labs-only.
4. Write a staff script for results. Use the trainer table above, and make “ask your doctor” the default answer to any question about a number.
5. Announce it to members. A QR code at the front desk, one email and a baseline test offer for members starting a challenge or personal training.
6. Schedule the retest. Put every tested member on a 90-day reminder.

See how the storefront works on our diagnostic labs page, or book a call to walk through it for your gym.

The Bottom Line

Blood testing gives gym members a measurable reason to keep training and gives the gym a product with a margin on every order. The setup is light: a licensed provider orders each test, Labcorp handles collection (with at-home kits from December 1, 2026), and the report lands in a portal with your gym’s name on it. Keep trainers to training and send questions about results to a doctor. Price for repeat testing rather than one-off sales, and when members start asking about testosterone, menopause or weight loss medication, the prescription programs can run under the same brand.