Top 10 Health Misconceptions

Gurloveleen Dhaliwal
Jul 23
4 min read

Updated: Oct 5

We all want to improve our health. We all make mistakes. We all also fall for misleading health myths that prevent the betterment of our bodies. This is why we put together some of the most common top health myths and misconceptions that can provide a greater understanding of what to do and what not to do. Here at Medknowlogy we have tried to create a fun and relatable way of improving our lives by avoiding common mistakes, through this Top 10 Health Misconceptions list. The list takes information from many credible health sources, so that people don’t need to spend precious time researching. Enjoy reading!

1. “You Only Need Sunscreen on Sunny Days”

Even though it seems like there is no sunlight, Ultraviolet (UV) radiation is always there. In other words, we don't need to have to see the sun to be at risk of harm. According to the World Health Organization, over 80% of UV rays can pass through clouds, meaning your skin is still exposed on overcast days¹. Even through windows, long-term exposure can increase your risk of skin cancer and premature aging. Daily application of SPF 30+ is a simple and effective preventative health measure, regardless of weather.

2. “Carbs Make You Gain Weight”

Carbohydrates are the body’s primary energy source and essential for brain and muscle function. The issue isn’t carbs but it's excess calories and ultra-processed foods. A 2018 Lancet study found that diets low in carbohydrates but high in animal fat and protein were associated with higher mortality rates². Whole grains, fruits, and vegetables are healthy carbs that support wellness in the long run and healthy weight management. So if we want to lose weight, other better methods would be eating more natural foods and maintaining a calorie deficit, preferably alongside exercise.

3. “Detox Teas and Juice Cleanses Remove Toxins”

Don't worry, our liver and kidneys are already equipped to detoxify our bodies 24/7. Commercial detox programs have no scientific backing, and some may cause nutrient imbalances or dehydration. Always follow the idea that don't trust in something that is too good to be true. The WHO emphasizes that many such products can be misleading and even harmful³. Rather than a trendy detox cleanse, a healthy liver, good hydration, and a balanced diet are far more effective for cleansing your system.

4. “Everyone Has to Drink 8 Glasses of Water a Day”

The idea of “8 glasses a day” is way too oversimplified. Water needs vary depending on factors including age, gender, activity level, and climate. The U.S. National Academies suggests ~3.7 liters per day for men and 2.7 for women, including fluids from foods⁴. Thirst, urine color, and environmental conditions are better guides for hydration than a fixed number. But remember, just because amounts of water you need can vary, it's important to stay hydrated for good health.

5. “Vaccines Cause Autism”

This myth originated from a fraudulent and now-retracted 1998 study. Multiple large-scale studies since –reviewed by the WHO and CDC – have found zero evidence linking vaccines to autism⁵. Vaccines save an estimated 4 to 5 million lives annually by preventing deadly infectious diseases⁶. Those who argue against vaccines because most people who die from diseases are vaccinated are misled seeing as most people are vaccinated, and this is the cause for the statistic as vaccines do not 100 percent prevent diseases but can significantly help.

6. “If It’s Natural, It Must Be Safe”

“Natural” does not mean safe or effective. Arsenic, hemlock, and cyanide are all natural – yet lethal. Similarly, many supplements sold as “natural remedies” are unregulated and may interact dangerously with medications. The WHO cautions consumers to critically evaluate natural health products and consult licensed providers⁷. In fact, apps are available nowadays to scan products and they can help determine a rating of 10 on how healthy a product is for you!

7. “You Can Sweat Out Toxins”

Sweat is mostly water, salt, and electrolytes – not toxins. Your liver and kidneys handle detoxification. WHO notes that using saunas for detoxification is a popular but medically inaccurate belief⁸. While sweating can have other benefits (like stress relief), it doesn't replace proper metabolic detoxification. So no need to stress, just keep your body healthy through diet and exercise!

8. “Antibiotics Cure Viral Infections”

Antibiotics only kill bacteria and not viruses. Taking them for colds, flu, or COVID-19 does nothing to fight the illness and contributes to antibiotic resistance, one of the WHO’s top 10 global public health threats⁹. Misuse leads to “superbugs” that are harder and sometimes impossible to treat. Always be careful and take appropriate procedures including medicine like Tylenol to lessen the symptoms of viruses.

9. “Cracking Your Knuckles Causes Arthritis”

This common belief has no scientific support. A study published in the Journal of the American Board of Family Medicine showed no correlation between knuckle cracking and arthritis¹⁰. The popping sound is caused by gas bubbles, not joint damage. At worst, frequent cracking may cause temporary swelling or reduced grip strength. If you want to learn more about this our instagram account @Medknowlogy has more on this myth!

10. “Fat Should Be Avoided in a Healthy Diet”

Dietary fat is essential for hormone production, brain function, and nutrient absorption. The real issue is the type of fat. Trans fats and excessive saturated fats are harmful, but unsaturated fats like those from avocados, nuts, and olive oil are beneficial and protective. The WHO recommends replacing trans fats with healthier alternatives to reduce the risk of heart disease¹¹. What is more important is cutting our processed food and high sugar amounts as they lead to diseases and weight gain!