- A new survey suggests NHS staff are increasingly having to correct false or misleading claims about supplements during consultations.
- Cancer charities warn that online claims about turmeric, St John’s wort, magnesium, apricot kernels and other products can distract from evidence-based care.
- The issue is not that all supplements are bad, but that “natural” does not automatically mean safe.
Health misinformation about supplements has become a routine problem in NHS consultations.
A survey for the World Cancer Research Fund found that two in five frontline health workers encounter misleading supplement claims from patients at least once a week.
Among nurses and midwives, the figure was even higher.
The problem is not simply that people are curious about vitamins or herbal products.
It is that many arrive with claims from TikTok, wellness websites, social media influencers and newspaper headlines that sound confident but are not backed by good evidence.
Cancer specialists are especially concerned.
Patients facing cancer are often frightened, exhausted and searching for control.
That makes them vulnerable to promises of miracle cures, detoxes, superfoods or supplements that claim to boost recovery.
Some of these claims are merely useless.
Others can be dangerous.
Apricot kernels, for example, can cause cyanide toxicity.
St John’s wort can interact with medicines.
Turmeric supplements have been linked with liver injury in some cases.
Magnesium is not one single thing either.
Different forms behave differently, and some can cause diarrhoea.
The wider misconception is that over-the-counter products are automatically harmless.
That is not true.
If a supplement has an active effect, it can also have side effects, interactions and risks.
The concern is that false claims may pull people away from the changes that genuinely reduce cancer risk.
These include not smoking, keeping a healthy weight, limiting alcohol, eating a balanced diet and being physically active.
Clinicians are now spending precious appointment time undoing misinformation rather than focusing on care.
- Low vitamin B12 and folate may contribute to fatigue and low motivation
- Beer contains vitamin B6 but may not be the most sensible way to get it
- Daily multivitamin may modestly slow biological ageing in older adults
That is a problem for patients and for an already pressured NHS.
None of this means every supplement should be dismissed.
Vitamin D, folic acid in pregnancy and clinically recommended supplements can be important.
But the decision should be based on need, evidence and safety, not online hype.
The simplest rule is still the best one.
If you have cancer, take regular medication or have a long-term condition, speak to a qualified health professional before starting supplements.
Your health is too important to outsource to an algorithm.
