1. Shaved Hair Grows Back Thicker and Darker Contrary to popular belief, shaving hair does not alter its thickness, color, or rate of growth. The blunt ends created by shaving may give the illusion of thicker hair, but this effect is purely cosmetic and temporary. 2. Eight Glasses of Water a Day The recommendation to drink eight glasses of water daily is not based on scientific evidence. Individual hydration needs vary depending on numerous factors, including diet, climate, and physical activity. Many foods and beverages contribute to total fluid intake, and the body's thirst mechanism is a reliable indicator of hydration needs. 3. Nails and Hair Grow After Death This myth arises from the appearance of longer nails and hair after death, which is actually caused by the retraction of the skin as it dehydrates and shrinks. There is no post-mortem growth of nails or hair. 4. Using Only 10 Percent of Our Brains The myth that humans use only 10 percent of their brains is widely debunked. Neuroimaging studies show that virtually all parts of the brain have identifiable functions and are active over a 24-hour period. Even simple tasks require more than 10 percent of brain activity. 5. Reading in Dim Light Damages Eyesight While reading in dim light can cause eye strain and discomfort, it does not result in permanent damage to eyesight. The strain is temporary and can be alleviated by proper lighting and regular breaks to rest the eyes. 6. Turkey Causes Drowsiness Turkey does contain tryptophan, an amino acid that can promote sleep. However, turkey does not contain significantly more tryptophan than other common meats. The drowsiness often felt after a large Thanksgiving meal is more likely due to the overall large intake of food and carbohydrates, along with alcohol consumption, rather than the turkey itself. 7. Cellphones Are Dangerous in Hospitals Modern studies have shown that cellphones pose minimal risk of interference with medical equipment. In fact, cellphones can enhance communication among healthcare staff, potentially reducing errors and improving patient care. Hospital policies are increasingly accommodating the use of cellphones, balancing caution with the benefits of improved connectivity. These myths continue to circulate, even among healthcare professionals. Understanding the evidence behind these beliefs can improve patient education and dispel longstanding misconceptions.
