Full-Body Scans: The Latest Trend in Preventative Healthcare

Full-Body Scans: The Latest Trend in Preventive Healthcare

Nov 26 2025
By Jackie Kolgraf   (Edited and approved by Stephen C. Rose, PhD. )                                                                                                                                                                                                                                                                                                                                  

What if you could spot trouble brewing in your body—before you feel a thing—and do something about it? That’s the promise behind today’s boom in commercial full-body scans: pay out of pocket, spend under an hour in a scanner, and walk away with a detailed report of what’s happening inside you. (Or at least, what the scanner can see.)

The appeal is obvious. The scientific reality is…more complicated.

What is a “full-body scan”?

In consumer preventive medicine, “full-body scan” usually means one of two things:

• Whole-body MRI (Magnetic Resonance Imaging): uses a strong magnetic field and radio waves to create images. MRI does not use ionizing radiation (the kind used in X-rays and CT). [1]
• Whole-body CT (Computed Tomography): uses X-rays (ionizing radiation) to create cross-sectional images. CT radiation exposure may slightly increase lifetime cancer risk, and risk is higher with higher cumulative exposure. [2–4]

A scan might be done without contrast, though some medical MRI protocols use gadolinium-based contrast agents to improve visualization in selected situations. [1] Commercial providers often advertise "no contrast." [5]

What can these scans detect—and what can they miss?

A whole-body MRI can image many organs and regions (commonly brain/neck/spine/abdomen/pelvis and large joints), and it can identify a range of structural findings—for example cysts, masses, some vascular abnormalities, degenerative changes, and other “incidental findings.” [6]

But "seeing a lot" is not the same as "screening well." Sensitivity varies widely by organ system and by protocol; even the research literature notes that adding dedicated vascular and/or colon MRI protocols increases detection compared with general screening whole-body MRI. [6] Commercial providers also explicitly state that their scans may not detect some very small cancers and are designed to complement - not replace - standard medical evaluation. [10]

The most important point: full-body scans do not replace proven screening tests

It can be tempting to think: why schedule a colonoscopy, a mammogram, and other tests if one big scan can cover everything? Because modern screening recommendations are based on outcomes: does a test reduce disease deaths or serious complications in real populations? Whole-body screening MRI/CT has not met that bar for average-risk, asymptomatic people.

For example:

• The USPSTF recommends biennial screening mammography for average-risk women ages 40–74. [7]
• The USPSTF recommends colorectal cancer screening starting at 45 (with multiple accepted options, including colonoscopy). [8]
• The USPSTF recommends annual low-dose CT only for high-risk lung cancer screening (ages 50–80 with ≥20 pack-years and currently smoke or quit within 15 years). [9]

Even Prenuvo's own language says whole-body MRI can be an adjunct but is not intended to replace colonoscopy, dedicated breast imaging, Pap testing, or low-dose CT for high-risk lung screening. [10]

Why do people get full-body scans anyway?

1) Peace of mind (sometimes)

Some people want a baseline or reassurance. That’s understandable. But there’s a catch: scanning more often means finding more “things,” many of which are benign but not immediately classifiable. That uncertainty can create anxiety rather than relieve it. [6,11]

2) Early detection (occasionally)

There are real anecdotes - some widely publicized - where a scan found a serious condition early. Kim Kardashian, for example, said in 2025 that a Prenuvo scan led to additional brain imaging and an aneurysm diagnosis. [12] Stories like this are compelling, but they are not the same as evidence that a screening approach helps more people than it harms.

3) High-risk surveillance (the most defensible use case)

Whole-body MRI has a clearer role in specific inherited cancer predisposition syndromes (e.g., Li-Fraumeni syndrome), where guidelines recommend surveillance strategies that may include regular whole-body MRI because cancer risk is unusually high and avoiding ionizing radiation matters. [13]

That’s a very different scenario from “healthy, low-risk adult wants a check-everything scan.”

How long does a full-body scan take?

Consumer whole-body MRI offerings often take under an hour, though scan times vary by protocol and add-ons. [5]

The experience is usually noninvasive: you lie on a table that slides into the scanner, and the study is read by a radiologist before results are returned. MRI can be noisy, and it is not suitable for everyone (for example, certain implants or metallic fragments can be unsafe in a strong magnetic field). [1]

What is a DEXA (DXA) scan—and is it “full-body”?

A DEXA/DXA scan is a low-dose X-ray test used primarily to measure bone mineral density (osteoporosis screening). [15] Whole-body DXA can also estimate body composition in some settings, but it is not the same kind of "full-body scan" as whole-body MRI or CT marketed for broad disease detection. [15,16]

How much do full-body scans cost—and does insurance cover them?

Pricing varies widely. One major provider lists whole-body MRI packages in the thousands of dollars, and notes that the scan is not covered by health insurance “at this time” (while acknowledging some people may pursue partial reimbursement). [14]

Why are full-body scans controversial?

1) Professional guidance is cautious for average-risk people

The American College of Radiology (ACR) states it does not believe there is sufficient evidence to recommend total-body screening MRI for people without symptoms or relevant risk factors. [17]
The Choosing Wisely recommendation hosted by the American Academy of Family Physicians and sponsored by the American College of Preventive Medicine advises against whole-body scans for early tumor detection in asymptomatic patients. [18]
For whole-body CT screening in asymptomatic people, the FDA says it has not been shown to meet accepted screening criteria, and professional societies have not endorsed it; the FDA also emphasizes potential harms from radiation and false or insignificant findings. [3,19]

2) False positives and incidental findings are common

A 2019 systematic review/meta-analysis of whole-body MRI in asymptomatic adults (12 studies; 5,373 subjects) found:

• “Critical” and “indeterminate” incidental findings were substantial overall.
• Among the six studies reporting false positives, the pooled false-positive proportion was 16.0% (with wide uncertainty).
• Only one study reported follow-up that allowed a false-negative estimate (2.0%), and verification of negative scans was generally lacking. [6]

A BMJ systematic review/meta-analysis also found that a meaningful proportion of asymptomatic adults have potentially serious incidental findings on brain/body MRI, while noting the downstream health consequences are often uncertain. [11]

Translation: full-body scans often lead to more imaging, referrals, and sometimes biopsy—not because the scan “found cancer,” but because it found something ambiguous that must be ruled out.

3) CT scans add radiation exposure

CT uses ionizing radiation; the FDA notes a small potential increase in lifetime cancer risk from CT radiation exposure. [2–4] The issue isn’t that one CT scan is guaranteed harm—it’s that screening implies repetition, and repeated exposure increases cumulative dose.

Are full-body scans “accurate”?

They can be accurate at identifying certain findings, but they are not magic, and they are not uniformly sensitive across all organs and diseases. Even commercial providers note limitations, including potentially missing very small cancers, and emphasize that scans complement rather than replace targeted screening and clinical evaluation. [10]

Public anecdotes illustrate both sides:

• Some people report a serious finding that led to timely treatment. [12]
• Others report missed findings or false reassurance; a high-profile malpractice case involving a former customer has attracted attention (allegations are not the same as proven performance data). [20]

Anecdotes are emotionally persuasive, but they are not a substitute for validated screening evidence.

So…are full-body scans worth it?

For average-risk, asymptomatic people, the evidence for routine whole-body MRI/CT screening improving outcomes is still limited, and the downsides—false positives, incidental findings, follow-up cascades, cost, and (for CT) radiation—are real. [3,6,17–19]

For high-risk groups with inherited cancer syndromes, whole-body MRI surveillance is a different category and is supported by guideline-based recommendations. [13]

If you’re considering a scan, a practical approach is:

1. Make sure you’re up to date on proven screening for your age/risk (mammography, colorectal screening, lung screening if high-risk). [7–9]
2. Treat any full-body scan as adjunct information, not a replacement for medical care. [10]
3. Go in with eyes open: you may buy reassurance—or you may buy a year of follow-up appointments. [6,11]

References

[1] National Institute of Biomedical Imaging and Bioengineering. Magnetic Resonance Imaging (MRI). Available online: https://www.nibib.nih.gov/science-education/science-topics/magnetic-resonance-imaging-mri (accessed on 1 March 2026).

[2] U.S. Food and Drug Administration. Computed Tomography (CT). Available online: https://www.fda.gov/radiation-emitting-products/medical-x-ray-imaging/computed-tomography-ct (accessed on 1 March 2026).

[3] U.S. Food and Drug Administration. Full-Body CT Scans - What You Need to Know. Available online: https://www.fda.gov/radiation-emitting-products/medical-x-ray-imaging/full-body-ct-scans-what-you-need-know (accessed on 1 March 2026).

[4] U.S. Food and Drug Administration. What Are the Radiation Risks from CT? Available online: https://www.fda.gov/radiation-emitting-products/medical-x-ray-imaging/what-are-radiation-risks-ct (accessed on 1 March 2026).

[5] Prenuvo. FAQ. Available online: https://prenuvo.com/faq (accessed on 1 March 2026).

[6] Kwee, R.M.; Kwee, T.C. Whole-body MRI for preventive health screening: A systematic review of the literature. J. Magn. Reson. Imaging 2019, 50, 1489-1503, doi:10.1002/jmri.26736.

[7] U.S. Preventive Services Task Force. Breast Cancer: Screening. Available online: https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/breast-cancer-screening (accessed on 1 March 2026).

[8] U.S. Preventive Services Task Force. Colorectal Cancer: Screening. Available online: https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/colorectal-cancer-screening (accessed on 1 March 2026).

[9] U.S. Preventive Services Task Force. Lung Cancer: Screening. Available online: https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/lung-cancer-screening (accessed on 1 March 2026).

[10] Prenuvo. Advanced Whole Body MRI Scans for Early Diagnosis. Available online: https://prenuvo.com/the-scan (accessed on 1 March 2026).

[11] Gibson, L.M.; Paul, L.; Chappell, F.M.; Macleod, M.; Whiteley, W.N.; Al-Shahi Salman, R.; Wardlaw, J.M.; Sudlow, C.L.M. Potentially serious incidental findings on brain and body magnetic resonance imaging of apparently asymptomatic adults: systematic review and meta-analysis. BMJ 2018, 363, k4577, doi:10.1136/bmj.k4577.

[12] Benadjaoud, Y.; Leib, M. Kim Kardashian shares health update after revealing aneurysm scare. Good Morning America 2025. Available online: https://www.goodmorningamerica.com/culture/story/kim-kardashian-diagnosed-aneurysm-126797351 (accessed on 1 March 2026).

[13] Petralia, G.; Zugni, F.; Summers, P.E.; Colombo, A.; Pricolo, P.; Grazioli, L.; Colagrande, S.; Giovagnoni, A.; Padhani, A.R.; Italian Working Group on Magnetic Resonance. Whole-body magnetic resonance imaging (WB-MRI) for cancer screening: recommendations for use. Radiol. Med. 2021, 126, 1434-1450, doi:10.1007/s11547-021-01392-2.

[14] Prenuvo. Pricing. Available online: https://prenuvo.com/pricing (accessed on 1 March 2026).

[15] MedlinePlus. Bone Density Scan: MedlinePlus Medical Test. Available online: https://medlineplus.gov/lab-tests/bone-density-scan/ (accessed on 1 March 2026).

[16] Shepherd, J.A.; Ng, B.K.; Sommer, M.J.; Heymsfield, S.B. Body composition by DXA. Bone 2017, 104, 101-105, doi:10.1016/j.bone.2017.06.010.

[17] American College of Radiology. ACR Statement on Screening Total Body MRI. Available online: https://www.acr.org/News-and-Publications/Media-Center/2023/ACR-Statement-on-Screening-Total-Body-MRI (accessed on 1 March 2026).

[18] American Academy of Family Physicians. Don't use whole-body scans for early tumor detection in asymptomatic patients. Available online: https://www.aafp.org/pubs/afp/collections/choosing-wisely/250.html (accessed on 1 March 2026).

[19] U.S. Food and Drug Administration. Whole-Body CT Screening - Should I or Shouldn't I Get One? Available online: https://www.fda.gov/radiation-emitting-products/medical-x-ray-imaging/whole-body-ct-screening-should-i-or-shouldnt-i-get-one (accessed on 1 March 2026).

[20] Stempniak, M. Whole-body MRI provider Prenuvo loses bid to limit damages in high-profile malpractice case. Radiology Business 2025. Available online: https://radiologybusiness.com/topics/healthcare-management/legal-news/whole-body-mri-provider-prenuvo-loses-bid-limit-damages-high-profile-malpractice-case (accessed on 1 March 2026).