We've all heard them - those persistent health 'facts' that get passed down through generations or circulate endlessly online. But how many of these commonly held beliefs are actually supported by medical science?
We spoke with leading NHS doctors and medical experts to separate fact from fiction and reveal the truth behind some of the most enduring health myths that could be impacting your wellbeing decisions.
The Vitamin C Miracle: More Than Just Oranges?
"The idea that loading up on vitamin C will prevent colds is one of the most persistent myths in healthcare," explains Dr Sarah Jenkins, an NHS GP based in London. "While vitamin C is essential for immune function, numerous studies have shown that for most people, megadoses won't actually stop you catching a cold."
Research indicates that vitamin C might slightly reduce the duration of symptoms, but the effect is modest. "A balanced diet typically provides all the vitamin C your body needs," Dr Jenkins adds. "Save your money on those expensive supplements."
Drink Eight Glasses Daily? Your Body Knows Better
That universal advice about drinking eight glasses of water daily might be doing more harm than good. "It's not just about plain water," says nutritionist Michael Trent. "Your body gets hydration from many sources including tea, coffee, fruits and vegetables."
Rather than counting glasses, experts recommend listening to your body's thirst signals and checking your urine colour - pale yellow indicates good hydration.
Cracking Joints: Arthritis Connection Debunked
If you've been warned that cracking your knuckles leads to arthritis, you can breathe a sigh of relief. "Multiple studies have found no connection between joint cracking and arthritis development," confirms Dr James Peterson, a rheumatology consultant.
The popping sound comes from gas bubbles forming in the synovial fluid, not bones grinding together. "While excessive cracking might annoy those around you, it's not damaging your joints," he assures.
Other Common Health Myths Exposed
- Sugar causes hyperactivity in children: "Multiple controlled studies show no direct link," says paediatric specialist Dr Emma Richardson
- We only use 10% of our brains: "Brain imaging clearly shows we use all parts of our brain throughout the day," explains neurologist Dr Ben Carter
- Reading in dim light ruins eyesight: "It might cause temporary strain, but no permanent damage," confirms optometrist Sarah Wilkinson
- Antibiotics work on viruses: "This misconception contributes to antibiotic resistance," warns infectious disease expert Dr Mark Thompson
Why Do Health Myths Persist?
"Many health myths contain a kernel of truth that gets distorted over time," explains health psychologist Dr Lisa Morgan. "They're also often spread by well-meaning friends and family, making them harder to challenge."
The rise of social media has accelerated the spread of misinformation, making it increasingly important to consult qualified medical professionals rather than relying on viral health tips.
"If a health claim seems too good to be true, it probably is," advises Dr Jenkins. "Always check with your GP before making significant changes to your health routine based on something you've heard or read online."
