Is a full-body MRI scan worthwhile as a preventive measure?
There is no evidence that a preventive full-body MRI in healthy individuals leads to better health outcomes, while the risk of apparent abnormalities and unnecessary follow-up testing is real. Discuss the pros and cons carefully with your doctor before considering such a scan.
In more than half of healthy, symptom-free children and young people, research found abnormalities in the bone marrow that would quickly be regarded as suspicious in a clinical setting, but that in reality are not. These kinds of apparent abnormalities are a concrete risk of preventive full-body MRI and can lead to unnecessary follow-up investigations, anxiety, and perhaps even unnecessary treatment.
In healthy adults the same problem is visible in the spine. A study of 200 adults without symptoms who underwent a full-body MRI as a health check found that many had wedge-shaped vertebrae, intervertebral disc problems, or wear and tear. Almost all of them had no complaints whatsoever. Yet such a finding sometimes triggers further diagnostic testing, with no clarity on whether the person actually benefits.
Whether the scan genuinely leads to better health outcomes or lower mortality has not been demonstrated. There is one study that describes how people experience the procedure and how satisfied they are with it, but it does not examine clinical effectiveness. Positive expectations and a friendly manner make the scan more pleasant; claustrophobia makes it less so. That tells us something about how to improve the experience, but nothing about whether the scan is worthwhile.
In short, preventive full-body MRI regularly produces incidental findings that are difficult to interpret in practice, while evidence of a concrete clinical benefit is lacking. This makes the balance uncertain at present, particularly for children and young people.
The claims are based on a limited number of studies (PMID 36148490, 35617871, 35843014, 34107750). No RCTs or meta-analyses on clinical outcomes of preventive full-body MRI are available in the sources provided. The findings on false-positive results in children are associative in nature.
Does whole-body cryotherapy actually work for your health?
For specific applications, such as pain following knee surgery and possibly improved lipid levels, WBC shows small positive signals, but the evidence is too thin and too inconsistent to recommend it broadly. If you still want to try it, be aware that side effects such as skin frostbite are possible and that no standard protocol exists.
Is donating blood regularly good for your health?
Regular blood donation is safe for many people, but it can deplete your iron stores, especially if you menstruate or donate frequently. Have your ferritin level checked regularly and discuss your donation frequency with your doctor if you want to become pregnant or are feeling tired.
What are the best proven methods to prevent and treat migraines?
Well-proven treatments are available for both acute attacks and prevention. For a mild attack, start with an NSAID or paracetamol, and for severe attacks choose a triptan, as early in the attack as possible.
What can and cannot be concluded from a multifactorial health study in which several interventions are tested simultaneously?
Multifactorial research can reliably measure the effects of several interventions simultaneously, but whether the findings can be generalised depends on how long the follow-up lasted, whether participants were blinded, and whether the interventions had no interaction with one another. For each outcome, consider how large and how durable the observed effect is, not merely whether it is statistically significant.
Is intermittent fasting good for longevity?
Intermittent fasting improves health markers such as weight and insulin sensitivity, but whether it also makes you live longer has not yet been proven in humans. It is worth considering, but discuss it with your doctor first if you belong to a risk group.
Do multivitamins help with healthy ageing?
Daily multivitamins appear to offer modest protection for older adults' memory, but for most other aspects of healthy ageing the effect is small or absent. If you have a confirmed deficiency in vitamins or minerals, supplementation is certainly worthwhile; do not regard it as a wonder remedy.