How to Evaluate PEMF and Infrared Therapy Devices Before You Buy

What You Need to Know Before Testing PEMF and Infrared Devices

Pulsed electromagnetic field (PEMF) therapy and infrared therapy devices are everywhere—from wellness boutiques to online marketplaces. Brands like Therasage, BioCharger, and dozens of others promise pain relief, faster recovery, improved circulation, and better sleep. But how do you know if a device actually works, or if you’re paying for marketing?

At Unbias Review, we believe the answer lies in transparent evaluation. Before you spend hundreds or thousands of dollars on a wellness device, you need a clear framework for testing claims, understanding the science, and spotting the difference between what a company advertises and what independent evidence actually supports.

This guide walks you through exactly how to evaluate PEMF and infrared therapy devices at home—what to test, what questions to ask, and how to interpret results honestly. We’ll show you how to cut through marketing language and make a decision based on real criteria, not hype.

Prerequisites: What You Should Know Before Starting

Before you begin testing any PEMF or infrared therapy device, understand these foundational points:

Medical Device Classification

According to FDA guidance on electromagnetic therapy devices, PEMF and infrared devices fall into different regulatory categories depending on their claims. Some are cleared as medical devices; others are marketed as wellness tools with no FDA approval. This distinction matters. A device cleared for pain relief has undergone safety and effectiveness testing; one marketed for “general wellness” has not. Always check whether the device you’re evaluating has FDA clearance for specific claims, or if it’s positioned as a general wellness tool.

The Evidence Gap

The National Center for Complementary and Integrative Health (NCCIH) summary on electromagnetic field therapy is clear: while some research suggests PEMF may help with certain conditions like osteoarthritis and wound healing, the evidence is mixed, study quality varies widely, and many claims lack rigorous support. This doesn’t mean the devices don’t work—it means the science is still developing. When you test, you’re evaluating whether this specific device delivers on its specific claims, not whether the technology itself is proven.

Your Role as a Tester

You are not a clinical researcher. At-home testing cannot replicate a randomized controlled trial. What you can do is observe whether the device functions as advertised, whether it’s practical to use, whether you experience any measurable changes in the outcome it claims to address, and whether those changes persist over time. This is subjective experience combined with objective observation—valuable for your own decision-making, but not a substitute for medical evidence.

Health Claims vs. Wellness Claims

Understand the difference. A health claim (“reduces arthritis pain”) is a medical assertion and requires evidence. A wellness claim (“supports relaxation and recovery”) is vaguer and harder to disprove. When evaluating, look for the specific claim the brand makes, then ask: Is this a health claim or a wellness claim? Does evidence exist? Has this device been tested for this outcome?

Step 1: Research the Device’s Claims and Regulatory Status

Before you buy or test anything, know exactly what the manufacturer claims and whether those claims are backed by regulatory approval.

Document the Advertised Claims

Visit the brand’s official website and write down every claim they make. Don’t paraphrase—use their exact language. Examples:

• “Reduces pain and inflammation”
• “Accelerates muscle recovery”
• “Improves sleep quality”
• “Enhances circulation”
• “Supports cellular energy production”

Note the frequency, intensity, duration, and any population they recommend it for (athletes, elderly, chronic pain patients, etc.).

Check FDA Clearance Status

Go to the FDA’s PEMF and electromagnetic device database or search the FDA’s 510(k) database directly. Search by brand name and device model. If the device is listed:

• Note the specific indication (what it’s cleared to treat)
• Read the summary of safety and effectiveness
• Check the clearance date (older clearances may reflect less rigorous standards)

If the device is not FDA-cleared, the manufacturer cannot legally make disease claims. If they do, that’s a red flag.

Review Published Research

Search PubMed for peer-reviewed studies on the specific device or very similar devices. Look for:

• Randomized controlled trials (strongest evidence)
• Systematic reviews or meta-analyses (summaries of multiple studies)
• Studies published in the last 5–10 years (more recent = more relevant)
• Study size (larger is better)
• Conflict of interest disclosures (did the manufacturer fund the study?)

For example, a peer-reviewed review on PEMF and osteoarthritis shows mixed results—some studies found benefit, others didn’t. This is the honest picture: not a clear yes or no, but nuance.

Check Independent Reviews

Look for reviews from reputable independent testing sources. As we detail in our framework for unbiased product testing, credible reviews should disclose their testing methodology, whether they received the device free, and how they measured outcomes. Avoid reviews that only list pros and cons without explaining how those were determined.

Step 2: Evaluate Specifications and Build Quality

Now that you understand what the device claims and what evidence exists, assess whether the device itself is well-designed and likely to deliver on those claims.

Verify Technical Specifications

The manufacturer should publicly list:

• Frequency (measured in Hz—how many pulses per second)
• Intensity or power output (measured in mT or Gauss for PEMF; watts or mW/cm² for infrared)
• Wavelength (for infrared devices; typically 600–1000 nm for red light, 1000+ nm for near-infrared)
• Treatment duration (how long each session should last)
• Recommended frequency (how many times per day or week)
• Dimensions and weight
• Warranty and return policy

If the manufacturer doesn’t list these, ask why. Legitimate devices are transparent about specs.

Cross-Check Claims Against Specs

For example, if a PEMF device claims to treat deep tissue but operates at a very low frequency (say, 2 Hz), that may not align with what research suggests about penetration depth. If an infrared device claims to deliver therapeutic wavelengths but the wavelength isn’t specified, you can’t verify the claim. Mismatches don’t prove the device doesn’t work, but they suggest the company may not understand its own product.

Assess Build Quality

When you receive the device:

• Is it well-constructed, or does it feel flimsy?
• Are the controls responsive and clear?
• Is the instruction manual detailed and professional, or vague and full of unsubstantiated claims?
• Are there obvious safety warnings (e.g., “Do not use if you have a pacemaker”)?
• Does the device have certification marks (CE, FCC, UL) visible on the product or documentation?

Poor build quality doesn’t mean the device won’t work, but it suggests the manufacturer may cut corners elsewhere.

Step 3: Test Safety and Basic Functionality

Before using the device on yourself, verify it’s safe and operates as advertised.

Check for Safety Warnings and Contraindications

Read the instruction manual thoroughly. Legitimate devices will list:

• Who should not use it (people with pacemakers, pregnant women, etc.)
• Potential side effects
• Precautions during use
• When to stop using it

If the manual says the device is safe for “everyone,” that’s unrealistic and a warning sign.

Verify Basic Operation

• Does the device power on and off as expected?
• Do the controls (intensity, frequency, duration) respond?
• For infrared devices, can you see the light output (red or near-infrared)? Does it feel warm as expected?
• For PEMF devices, does the applicator vibrate or produce any sensations when activated? (Note: you may not feel anything, which is normal for low-frequency PEMF.)
• Does the device produce any unusual sounds, smells, or heat?

Test on a Non-Sensitive Area First

If you’re using the device on your body, start with a small area—say, your forearm—at the lowest intensity setting. Use it for the minimum recommended duration. Wait 24 hours and observe for any skin irritation, allergic reaction, or unusual effects. Only after confirming no adverse reaction should you expand to larger areas or higher intensities.

Step 4: Establish a Baseline for Your Specific Outcome

Before using the device regularly, measure your starting point for whatever outcome you’re testing.

Define Your Outcome Clearly

Don’t test “general wellness.” Pick a specific outcome:

• “Knee pain when walking up stairs” (not just “knee pain”)
• “Time to fall asleep” (not just “sleep quality”)
• “Muscle soreness 24 hours after a workout” (not just “recovery”)
• “Skin appearance in the treatment area” (not just “skin health”)

The more specific, the more measurable.

Measure Your Baseline

For pain: Use a 0–10 pain scale. Rate your pain at the same time each day for 3–7 days before starting the device. Note what activities trigger or worsen the pain.

For sleep: Track sleep duration and quality using your phone’s sleep app or a simple log. Note bedtime, wake time, and a subjective quality rating (1–10) for 3–7 nights.

For muscle soreness: Rate soreness on a 0–10 scale 24 and 48 hours after a consistent workout (e.g., a specific run or strength session).

For skin: Take a photo in consistent lighting (same time of day, same location, same camera angle) before starting.

For circulation or energy: These are harder to measure objectively. Consider using a simple metric like “resting heart rate” (circulation) or “energy level rating” (subjective, 1–10).

Document Everything

Use a simple spreadsheet or notebook. Record:

• Date and time
• Baseline measurement
• Any other relevant factors (sleep, diet, exercise, stress, medications, weather)

These factors can affect your outcome independently of the device, so tracking them helps you distinguish device effects from other influences.

Step 5: Use the Device According to Instructions and Track Changes

Now begin using the device as the manufacturer recommends. Stick to the protocol exactly.

Follow the Recommended Protocol

Use the device at:

• The recommended frequency (e.g., once daily, twice daily, three times weekly)
• The recommended intensity
• The recommended duration
• For the recommended body area

Don’t improvise. If the manual says use it once daily for 8 minutes at medium intensity, do exactly that. If you change the protocol midway, you won’t know whether changes are due to the device or your modifications.

Track Your Outcome Consistently

Continue measuring your chosen outcome at the same time each day or session. If you’re tracking pain, rate it at the same time. If you’re tracking sleep, log it each morning. If you’re tracking muscle soreness, measure it 24 and 48 hours after workouts, as before.

Note Confounding Factors

Record anything that might affect your outcome:

• Changes in exercise, diet, or stress
• Other treatments you start (physical therapy, new medications, supplements)
• Sleep disruptions
• Seasonal changes
• Menstrual cycle (if relevant)

If you start a new exercise program the same week you begin the device, you won’t know which caused any improvement.

Run the Test for at Least 2–4 Weeks

Most manufacturers recommend using the device for at least 2 weeks before expecting results. For some outcomes (like chronic pain or skin changes), 4 weeks is more realistic. Stick with it for the full period before drawing conclusions.

Step 6: Interpret Your Results Honestly

After 2–4 weeks, compare your outcome measurements to your baseline. This is where objectivity matters most.

Look for a Clear Pattern

Did your measurements improve, worsen, or stay the same? Look for a consistent trend, not just one good day.

For example:

• Baseline pain: 7/10 for 5 days
• After 2 weeks of device use: 5/10, 6/10, 5/10, 5/10, 6/10
• This shows a consistent 1–2 point improvement.

Vs.:

• Baseline pain: 7/10, 8/10, 6/10, 7/10, 8/10
• After 2 weeks: 6/10, 8/10, 7/10, 8/10, 6/10
• This shows no clear pattern—just normal variation.

Account for Placebo Effect

Knowing you’re using a device designed to help creates expectation. This is the placebo effect, and it’s real—it can improve pain, sleep, and other subjective outcomes by 20–30% even if the device does nothing. To account for this:

• Compare your improvement to what you’d expect from placebo alone (typically modest)
• Ask: Is the improvement large enough to justify the cost and time?
• Consider: Did your other confounding factors change? Did you start exercising more, sleeping better, or reducing stress? That could explain the improvement.

Distinguish Correlation from Causation

If you improved while using the device, that doesn’t prove the device caused the improvement. It’s correlation. To strengthen causation, consider:

• Did the improvement occur quickly after starting the device, or gradually over weeks?
• If you stopped using the device, would the improvement persist or fade?
• Did the improvement match the manufacturer’s timeline?

Be Willing to Say “No Clear Effect”

If your measurements show no improvement, or improvement within normal variation, the honest conclusion is that you didn’t experience a measurable benefit from this device. That’s valuable information. It doesn’t mean the device is worthless—it means it didn’t work for you, for your specific outcome, at the settings you used.

Step 7: Assess Practical Usability and Value

Even if the device works, is it practical and worth the money?

Evaluate Ease of Use

• How long does setup take?
• Is the device intuitive, or does it require constant reference to the manual?
• Is it portable, or does it require a specific location?
• How often do you realistically use it? (If the recommended frequency is twice daily but you forget, that’s a usability problem.)
• Does the device require charging or batteries? How often, and how long does charging take?

Consider Time Investment

If the device requires 15 minutes twice daily and you’re not consistent, it won’t deliver results. Be honest about whether you’ll stick with it long-term.

Calculate True Cost

Don’t just look at the purchase price. Consider:

• Warranty and replacement costs if it breaks
• Accessories or replacement parts
• Maintenance (cleaning, storage)
• Electricity or battery costs over time
• The cost per use if you calculate it over the device’s likely lifespan

For example, a $500 device you use 3 times a week for 2 years (312 uses) costs about $1.60 per use. A $2,000 device you use once a month for 2 years (24 uses) costs about $83 per use. The more expensive device might be worse value.

Compare to Alternatives

What else could you do with that money? For pain management: physical therapy, massage, over-the-counter medications, or exercise. For sleep: a better mattress, blackout curtains, or cognitive behavioral therapy for insomnia. For recovery: rest, nutrition, or coaching. Some alternatives have stronger evidence than PEMF or infrared devices.

Step 8: Extended Testing and Long-Term Verdict

If the device showed promise, extend your testing to confirm durability and long-term effects.

Continue Tracking for 8–12 Weeks

Short-term improvements might fade. Extend your tracking to 2–3 months to see if:

• Benefits persist
• You develop tolerance (the effect diminishes)
• Side effects emerge
• Your compliance drops (you use it less often)

Test Consistency

If you skip a few days, do benefits fade quickly? If so, the device requires strict adherence. If benefits persist despite missed sessions, that suggests a more durable effect.

Revisit the Evidence

After your extended test, return to the published research. Does your experience align with what studies show? If studies say PEMF helps osteoarthritis pain but you saw no effect on your knee pain, consider why: Is your condition different? Did you use the device correctly? Is the evidence weaker than you thought?

Red Flags: Warning Signs of Questionable Devices

While evaluating any PEMF or infrared device, watch for these warning signs:

Unsubstantiated Health Claims

If the manufacturer claims the device treats cancer, cures diabetes, or fixes serious conditions without FDA clearance, that’s illegal and a major red flag. Legitimate devices either have FDA clearance for specific claims or market themselves as wellness tools.

Vague or Exaggerated Language

“Energizes your cells,” “balances your body’s energy,” and “quantum healing” are marketing language without clear meaning. Real devices use specific, measurable claims: “reduces pain by X%” or “improves sleep latency by Y minutes.”

Absence of Specifications

If the manufacturer won’t tell you the frequency, intensity, or wavelength, they’re hiding something. Legitimate devices are transparent.

No Warranty or Poor Return Policy

A device with no warranty, a 14-day return window, or a restocking fee suggests the manufacturer isn’t confident in quality or durability.

Testimonials Instead of Evidence

Customer testimonials feel persuasive but are anecdotal and biased. They’re not evidence. Look for peer-reviewed research, not “John from Ohio says this cured his pain!”

Affiliate Links and Undisclosed Sponsorships

Be cautious of reviews that link to Amazon or the manufacturer’s store without disclosing affiliate relationships. As we explain in our guide to affiliate transparency in reviews, undisclosed affiliations create conflicts of interest. Look for reviews that clearly state whether they earn commission.

Pressure to Buy Now

“Limited-time offer,” “only 3 left in stock,” or “price increases tomorrow” are pressure tactics. Legitimate products are available consistently.

Common Outcomes: What to Realistically Expect

Based on current research and user reports, here’s what’s realistic to expect from PEMF and infrared devices:

Pain Management

Both PEMF and infrared have some evidence for reducing pain, particularly in osteoarthritis and musculoskeletal conditions. However, effects are typically modest (20–40% pain reduction) and may take 2–4 weeks to appear. Research on PEMF for sports recovery and active living shows promise for muscle soreness, but effects are not dramatic.

Sleep Quality

Some users report improved sleep, but evidence is limited. Placebo effect is likely substantial here. If you’re testing sleep, expect modest improvements and account for other sleep-hygiene changes.

Muscle Recovery

Athletes sometimes report faster recovery, but rigorous studies are limited. If you’re testing this, track objective metrics like “time to return to full training” rather than subjective “how recovered do I feel.”

Wound Healing

Infrared and PEMF both have some evidence for accelerating wound healing in clinical settings. A clinical review on PEMF and wound healing shows promise, but most studies involve medical-grade devices, not consumer models. If you’re testing a consumer device on a minor wound, improvement may be within normal healing timelines.

Circulation and Energy

These are subjective outcomes and hard to measure at home. Be skeptical of dramatic claims. Modest improvements in subjective energy or warmth are possible but could be placebo.

Skin Appearance

Infrared light may improve skin, but effects are subtle and take weeks. Take consistent photos and be honest about whether changes are meaningful or within normal variation.

Pro Tips for Rigorous At-Home Testing

Blind Yourself to the Condition

If possible, have someone else set up the device and randomly turn it on or off without telling you. This reduces placebo effect. (This is difficult for infrared, where you can see the light, but possible for PEMF.)

Use Objective Metrics When Possible

Instead of “I feel better,” use:

• Pain scale (0–10) at the same time each day
• Sleep duration and quality from your phone’s sleep app
• Resting heart rate (measured the same way each morning)
• Photos with consistent lighting and angles
• A specific functional test (e.g., “time to walk one flight of stairs”)

Track Confounding Factors Religiously

Exercise, diet, stress, medications, and sleep all affect your outcomes. If you change any of these during your test, you won’t know if improvements are from the device or the change.

Plan for a Control Period

After 4 weeks of using the device, stop using it for 1–2 weeks and track your outcome. If improvements fade, that’s evidence the device was helping. If improvements persist, the device may have created a lasting effect—or placebo was the main driver.

Be Skeptical of Manufacturer-Provided Data

Manufacturers have incentive to present their devices in the best light. Prioritize independent, peer-reviewed research over company claims.

Summary: Your Decision Framework

Use this checklist to make your final decision:

Before Buying:

• I’ve verified the device’s FDA status and specific claims
• I’ve read peer-reviewed research on the device or similar devices
• I’ve checked independent reviews from credible sources
• I understand the specifications and whether they align with the claims
• I’ve identified a specific, measurable outcome to test

After Testing:

• I established a clear baseline and tracked it for at least 2 weeks
• I used the device exactly as recommended and tracked confounding factors
• I saw a measurable, consistent improvement (not just one good day)
• I accounted for placebo effect and other causes
• The improvement is large enough to justify the cost and time
• I tested for 4+ weeks and considered long-term durability

Value Assessment:

• The device is practical for my lifestyle
• The cost-per-use is reasonable compared to alternatives
• The warranty and return policy are solid
• I’m willing to use it consistently long-term

If you can check all these boxes, the device is likely worth buying for you. If you can’t, it’s not—regardless of marketing claims or testimonials.

Understanding the Bigger Picture: Evidence and Transparency

As we detail in our complete framework for unbiased product testing, honest evaluation requires separating marketing from reality. PEMF and infrared devices occupy a gray zone: some evidence exists, but it’s mixed, and many claims outpace the science.

The best approach is to test the device yourself using the framework above, compare your results to published research, and make a decision based on your specific outcome and budget. Don’t rely on the manufacturer’s claims, testimonials, or affiliate-heavy reviews. As we explain in what verified scores mean in product testing, a real evaluation requires transparency, methodology, and honesty about uncertainty.

If you’re comparing multiple devices, our approach to evaluating product comparisons applies here too: rank by your specific criteria (price, ease of use, evidence), test each one using the same protocol, and choose based on results, not marketing.

Final Thoughts

PEMF and infrared therapy devices may help with certain outcomes for certain people. But the only way to know if one will help you is to test it rigorously, measure the specific outcome that matters to you, and be honest about the results. This guide gives you the tools to do that.

Remember: a device that works for someone else might not work for you. A device with strong evidence behind it might underperform in your hands. And a device that seems too good to be true probably is. Test, measure, track, and decide based on data—not hope.

Sources

• FDA. “Electromagnetic Therapy Devices.” https://www.fda.gov/medical-devices/consumer-products/electromagnetic-therapy-devices
• National Center for Complementary and Integrative Health (NCCIH). “Electromagnetic Field Therapy—What the Science Says.” https://www.nccih.nih.gov/health/providers/digest/electromagnetic-field-therapy-science
• NIH Office of Dietary Supplements. “Wound Healing Fact Sheet for Health Professionals.” https://ods.od.nih.gov/factsheets/WoundHealing-HealthProfessional/
• International Society for the Study of the Lumbar Spine. “PEMF Patient Resources.” https://www.issls.org/PatientResources/PEMF
• PubMed Central. “Pulsed Electromagnetic Therapy: Literature Review and Current Perspectives.” https://pmc.ncbi.nlm.nih.gov/articles/PMC11506130/
• PubMed. “Pulsed Electromagnetic Fields for the Treatment of Osteoarthritis.” https://pubmed.ncbi.nlm.nih.gov/27881583/
• Frontiers in Sports and Active Living. “PEMF Stimulation as an Adjunct to Sports and Active Living.” https://www.frontiersin.org/journals/sports-and-active-living/articles/10.3389/fspor.2024.1471087/full
• Wound Practice and Research. “Integrative Review of PEMF and Wound Healing.” https://journals.cambridgemedia.com.au/wpr/volume-32-number-2/integrative-review-pulsed-electromagnetic-field-therapy-pemf-and-wound-healing
• WebMD. “Pulsed Electromagnetic Field (PEMF) Therapy.” https://www.webmd.com/vitamins/ai/ingredientmono-1323/pulsed-electromagnetic-field-pemf-therapy
• Mayo Clinic. “Red Light Therapy.” https://www.mayoclinic.org/tests-procedures/pain-management/in-depth/red-light-therapy/art-20465248