“FDA registered” isn’t “FDA approved”: a buyer’s map to wellness devices

Key takeaways

• “FDA registered” only means a company listed its facility with the agency, and the FDA issues no registration certificates of any kind³.
• “FDA cleared” usually means a device was found similar to one already sold, and the clearance covers a specific use, not every claim in the ads²⁸.
• In January 2026 the FDA updated its wellness policy so some wearables can show estimates like blood pressure without FDA review, if the numbers are validated and the product makes no disease claims¹.
• In 2024 the FDA warned that no smartwatch or smart ring is authorized to measure blood sugar on its own, and wrong readings can lead to dangerous insulin doses⁶.
• Before you buy, ask for the clearance number, read the cleared use, and get the return terms and warranty in writing³¹⁵.

On July 14, 2025, the Food and Drug Administration sent a warning letter to WHOOP, the fitness-band company. The issue was a feature called Blood Pressure Insights. FDA officials wrote that estimating blood pressure is “not a low-risk function” and that the feature needed FDA clearance or approval⁴.

Two months later, the agency told the public not to use unauthorized blood pressure features on smartwatches and rings⁵. Then, on January 6, 2026, the FDA reissued its policy on wellness products. The new version describes a wrist wearable that reports sleep, pulse and blood pressure. It says such a product can count as a low-risk wellness product, as long as its blood pressure values are validated¹.

There’s one more twist. WHOOP’s electrocardiogram feature had already been cleared by the FDA in April 2025⁷. One band, two features, two very different regulatory stories.

If the agency’s own position shifted within six months, shoppers can be forgiven for feeling lost. Massage guns, light panels, posture trainers, magnetic bracelets and sleep rings all sit somewhere on the same map. This guide shows you how to read it. Later articles in this series cover wearables and specific technologies in depth.

A device’s legal status depends on what the seller says it does

Under federal law, a medical device is a product intended to diagnose or treat disease, or to affect the body’s structure or function¹. The key word is “intended.”

The FDA’s wellness policy looks at a product’s labeling, advertising, app screens and functions. If any of them mention a disease or steer you toward medical care, the product is no longer a wellness product¹.

So the same hardware can land in different places. A vibrating massager sold to help you relax is one thing. The same massager sold to treat arthritis is making a medical claim.

The wellness policy covers low-risk products that make two kinds of claims¹:

• General health claims about fitness, weight, relaxation, stress, sleep, mental sharpness, self-esteem or sexual function, with no mention of disease.
• Healthy-lifestyle claims that a healthy habit may help lower the risk of, or help you live well with, a chronic condition such as heart disease, high blood pressure or type 2 diabetes, when that link is widely accepted.

To stay in the wellness lane, a product also has to be low risk. It can’t pierce the skin, be implanted, or use technology that normally needs safety controls, such as lasers or radiation¹. The FDA’s own examples of products that fail this test include tanning sunlamps, laser skin treatments and brain stimulation sold to improve memory¹.

This is the part most shoppers miss. When the FDA leaves a wellness product alone, it is not vouching for it. The guidance says that falling under the policy “does not establish that it has been shown to be safe and/or effective for its intended use”¹.

What changed in January 2026, and what didn’t

The 2026 version adds a section on sensors. It covers wearables that estimate blood pressure, oxygen level, blood sugar or heart rate variability with light or another method that doesn’t break the skin. Such a product can stay in the wellness lane only if it stays out of medicine¹:

• It isn’t pitched for diagnosing or managing a disease, or as a stand-in for an FDA-reviewed device.
• Its readings never steer you toward a particular medical step.
• If it shows numbers that resemble clinical values, the company has validated them through its own testing or published studies.

When a reading drifts outside a wellness range, the gadget may now say a health professional’s opinion could help. It still can’t name a disease, label the result abnormal, display a diagnostic cutoff or offer treatment advice¹. A product that calls itself “medical grade” or “clinical grade” falls outside the policy¹.

Some limits held firm. A glucose wearable that uses tiny microneedles is not low risk, even if it only makes wellness claims, because it breaks the outer layer of skin¹.

Older warnings also remain on the FDA’s website.

In February 2024, the agency told people not to use any smartwatch or smart ring that claims to measure blood sugar without piercing the skin. The FDA said it had not authorized, cleared or approved any such device. It warned that people with diabetes could take the wrong dose of insulin and suffer dangerously low blood sugar, confusion, coma or death within hours⁶. The September 2025 blood pressure warning was also still posted in October 2026, with no update⁵.

So the agency’s documents now pull in somewhat different directions. Until the FDA reconciles them, here is a safe rule: a wellness estimate is a trend to notice, never a number to treat.

Registered, cleared, approved, authorized: four words, four meanings

The FDA sorts medical devices into three classes by risk². Class I devices are low risk, like elastic bandages and exam gloves, and most don’t need FDA review before sale. Class II devices are moderate risk. Class III devices, like mechanical heart valves, carry the highest risk².

Each regulatory word on a box points to a different process.

Phrase on the box	What it means	What it does not mean
FDA registered	The company told the FDA where it makes or distributes devices. Facilities generally must register every year3.	Approval, clearance or any review of the product. The FDA issues no registration certificates3.
FDA cleared	The device passed a review called a 510(k) and was found substantially equivalent to a device already legally sold2.	That it works for every claim in the ads. Clearance covers a specific use.
FDA approved	A higher-risk device passed premarket approval, which requires valid scientific evidence of safety and effectiveness2.	That every model or add-on from that company is approved.
FDA authorized	A catch-all term. It can include a De Novo grant for a new kind of low- to moderate-risk device, or an emergency use authorization3.	Permanent approval. Emergency authorizations depend on a declared health emergency3.
Wellness product	The seller makes only general health claims for a low-risk product, with no FDA review1.	That the FDA tested or endorsed it1.

Watch for one trick in particular. Some sellers post official-looking “FDA certificates,” sometimes with the agency’s logo. The FDA says it doesn’t issue them. Using registration to suggest FDA approval makes a device misbranded under federal law³.

“Cleared” for one job, advertised for another

Cleared devices can still be sold with misleading claims. The Federal Trade Commission, which polices advertising, has made that point more than once.

In 2020, the FTC settled with NeuroMetrix and its CEO over Quell, a nerve-stimulation device worn below the knee. The FTC said the company advertised Quell as relief for chronic pain throughout the body and falsely called it “clinically proven.” The agency also said the company misrepresented the scope of its FDA clearance. The settlement was worth at least $4 million⁸.

That same year, the FTC acted against the sellers of the Willow Curve, a curved light-therapy device. The FTC said they falsely claimed FDA approval to treat chronic, severe pain and inflammation. They also ran ads dressed up to look like independent news stories⁹. The settlement imposed a $22 million judgment, partly suspended once each of the two owners paid $200,000⁹.

The FTC’s 2022 guidance on health products describes a similar case. An electronic ab belt was cleared as a Class II device to stimulate healthy muscle. Its ads paired “FDA Approved” with promises of lost inches and pounds. The FTC calls that deceptive, because the clearance never covered weight loss¹⁰.

That guidance covers health equipment, apps and tests, not only supplements. Health claims need “competent and reliable scientific evidence,” which generally means randomized controlled trials in people¹⁰. In that kind of study, people are assigned by chance to get the product or a comparison. Customer testimonials don’t count as proof, and a disclaimer like “for entertainment purposes only” doesn’t fix a misleading health claim¹⁰.

What the evidence shows for popular device types

Regulatory status and evidence are separate questions. A device can be cleared and only modestly useful. A wellness gadget can skip FDA review and still have decent research behind it. This article covers how the research stacks up for a few common categories.

Device type	Sold for	Evidence rating	What the research says
10,000-lux light box	Winter-pattern seasonal depression	Strong evidence	A mainstay treatment since the 1980s, usually 30 to 45 minutes each morning from fall to spring. It matched a form of talk therapy in a direct comparison14.
Wrist wearables	Ballpark heart rate and step counts	Strong evidence	Across 158 publications, about half of lab comparisons came within 3% of reference measures. Steps were often undercounted in the lab, and real-world heart rate data were thin11.
Wrist wearables	Accurate calories burned	Evidence says no, or unsafe	The review concluded that no brand met acceptable accuracy limits for energy use11.
Blue-light-filtering glasses	Less screen eye strain	Evidence says no, or unsafe	A 2023 Cochrane review of 17 trials found they may not reduce short-term eye strain. Effects on sleep are unclear12.
Static magnets in bracelets or pads	Pain relief	Not enough evidence	Studies are small and mixed. Magnetic mattress pads for fibromyalgia and magnets for carpal tunnel showed no significant benefit13.
Needle-free glucose watches and rings	Blood sugar	Evidence says no, or unsafe	None is authorized, and wrong readings can lead to dangerous medication doses6.

Two safety notes travel with this table. Light boxes filter out ultraviolet light, but people with certain eye diseases, or who take medicines that increase light sensitivity, should use them under medical care¹⁴. Magnets can interfere with pacemakers and insulin pumps, must come off before an MRI, and are dangerous if a child swallows them¹³.

How to look up a device in 10 minutes

You can check most claims yourself with free government tools. Try this routine before you buy.

1. Write down the exact claim. Screenshot the product page. Note the brand, the model and any phrase like “FDA cleared,” “clinically proven” or “medical grade.”
2. Ask the seller for a number. Cleared devices carry a 510(k) number that starts with K, and De Novo grants start with DEN⁷. If the only answer is “we’re FDA registered,” you have learned something important³.
3. Search Devices@FDA. You can search by device name or company name. Check the separate De Novo database for newer device types³.
4. Read the cleared use. Compare the official use with the ad. If, say, the clearance covers minor muscle aches and the ad promises arthritis relief, that gap matters⁸¹⁰.
5. Check feature by feature. A watch or ring can have one cleared feature and several unreviewed ones. The FDA keeps a list of authorized sensor features, such as certain heart rhythm and sleep apnea alerts, though the list isn’t complete⁷.
6. For blood pressure, look for product code DXN. The FDA says authorized blood pressure devices generally carry it, and you can search the 510(k) database by device name⁵.
7. Search the brand on fda.gov and ftc.gov. Look for warning letters, safety alerts and enforcement press releases.

Guarantees and warranties protect you only if you check them first

Device sellers love the words “risk free.” The Willow Curve case shows why to read the fine print. The FTC said people who tried its “risk free money back” guarantee were charged for shipping and handling, and many never saw a refund or waited over a year for one⁹.

If a product comes with a warranty, the FTC says the law requires that you be able to read it before you buy, in a store or online¹⁵. State law also gives most products implied warranties. In plain terms, a product should do what it’s meant to do, unless the seller lawfully sells it “as is”¹⁵.

Before you pay, check how long coverage lasts, what it excludes, and whether you pay for labor or shipping. Get spoken promises in writing and keep your receipt¹⁵. If a dispute stalls, the FTC suggests contacting the seller, then writing to the manufacturer, then reporting to ReportFraud.ftc.gov and your state attorney general¹⁵.

A good device supports a habit your body already knows

Many people who value natural health buy devices for good reasons. They want to track sleep, move more, ease sore muscles or get more morning light without a prescription. The best devices serve those goals.

A light box stands in for the winter sun. A step counter nudges you out the door. Your body does the real work.

The skepticism you bring to drug ads belongs here too. A gadget company has a product to sell, just as a drug company does. Asking for real trials of the actual device, and checking who ran them, protects both your money and your trust.

Readings are not diagnoses. Don’t change a medicine dose, skip a lab test or stop a treatment because of a wellness estimate. If you live with diabetes, high blood pressure or a heart condition, ask your clinician which FDA-authorized device to use for decisions⁵⁶. Check with your clinician first if you have an implant or take medicines that make you sensitive to light¹³¹⁴.

If a device hurts you, or its readings led to harm, report it to the FDA’s MedWatch program⁶. Report false advertising to the FTC¹⁵. For chest pain, trouble breathing, signs of a stroke or very low blood sugar, call 911.

Questions readers ask

The bottom line

A wellness device’s label tells you about paperwork, not results. “Registered” describes a company’s facility, “cleared” describes one specific use, and “wellness” means the FDA chose not to review the product. None of those words, on its own, tells you the device works.

Spend 10 minutes before you buy: find the number, read the cleared use, check the evidence and get the return terms in writing. Then let the device support the habits that keep you well, and save medical decisions for readings you and your clinician trust.

Related reading

• Six questions to ask before you buy anything for your health
• How to tell a real certification from a logo
• What protects your data when HIPAA doesn’t cover most health apps
• The wellness subscription you meant to cancel

Sources

1. U.S. Food and Drug Administration. “General Wellness: Policy for Low Risk Devices.” Guidance for industry and FDA staff, January 2026. fda.gov
2. U.S. Food and Drug Administration. “Is It Really ‘FDA Approved’?” Consumer Update, 2026. fda.gov
3. U.S. Food and Drug Administration. “Are There ‘FDA Registered’ or ‘FDA Certified’ Medical Devices? How Do I Know What Is FDA Approved?” 2021. fda.gov
4. U.S. Food and Drug Administration. Warning Letter to WHOOP, Inc. (CMS #709755). July 14, 2025. fda.gov
5. U.S. Food and Drug Administration. “Do Not Use Unauthorized Devices for Measuring Blood Pressure: FDA Safety Communication.” September 16, 2025. fda.gov
6. U.S. Food and Drug Administration. “Do Not Use Smartwatches or Smart Rings to Measure Blood Glucose Levels: FDA Safety Communication.” February 21, 2024. fda.gov
7. U.S. Food and Drug Administration. “Medical Devices that Incorporate Sensor-based Digital Health Technology.” Digital Health Center of Excellence, 2026. fda.gov
8. Federal Trade Commission. “Marketers of Pain Relief Device Settle FTC False Advertising Complaint.” Press release, March 4, 2020. ftc.gov
9. Federal Trade Commission. “FTC Puts an End to Deceptive Advertising of Light Therapy Device.” Press release, June 25, 2020. ftc.gov
10. Federal Trade Commission. “Health Products Compliance Guidance.” December 2022. ftc.gov
11. Fuller D, Colwell E, Low J, et al. “Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review.” JMIR mHealth and uHealth, 2020. pubmed.ncbi.nlm.nih.gov
12. Singh S, Keller PR, Busija L, et al. “Blue-light filtering spectacles for visual performance, sleep, and macular health in adults.” Cochrane Database of Systematic Reviews, 2023. cochrane.org
13. National Center for Complementary and Integrative Health. “Magnets for Pain: What You Need To Know.” 2023. nccih.nih.gov
14. National Institute of Mental Health. “Seasonal Affective Disorder.” 2023. nimh.nih.gov
15. Federal Trade Commission, Consumer Advice. “Warranties.” 2025. consumer.ftc.gov