Debunking Common Health Myths: From Breathing to Hair Turning White

Many widely held beliefs about health – like “the early bird catches the worm” or that deep breathing is always detoxifying – may not be entirely accurate. A new book, exploring the “shocking secrets of the human body,” challenges these assumptions, prompting a re-evaluation of common wisdom. Let’s delve into some of these surprising revelations.

The Risks of Mouth Breathing

Even as often considered a harmless habit, chronic mouth breathing can negatively impact health. Humans, like other mammals, are primarily designed to breathe through their noses. The nasal passages filter pathogens like viruses and bacteria with nasal hairs and mucus, and can even eliminate them.

The mouth lacks these protective mechanisms, making individuals more susceptible to colds and flu. Mouth breathing can lead to dryness, creating a breeding ground for pathogens and causing awful breath.

Why Excessive Deep Breathing Isn’t Always Beneficial

Deep breathing is often recommended for stress relief and relaxation. But, excessive deep breathing can disrupt the body’s delicate acid-base balance. While we inhale oxygen and exhale carbon dioxide, carbon dioxide plays a crucial role in regulating bodily functions.

Breathing too deeply can expel too much carbon dioxide, leading to discomfort such as dizziness or headaches. Moderation is key when practicing deep breathing exercises.

The Myth of the Early Bird

The adage “the early bird catches the worm” suggests that waking up early is inherently good. However, research indicates that the optimal wake-up time varies with age. Recommended wake-up times are 8-9 a.m. For those aged 15-30, 7-8 a.m. For those 31-64, and 6-7 a.m. For those over 65.

Waking up before your body’s natural rhythm can be detrimental to health, disrupting the body’s internal clock.

Sleep Timing, Not Golden Hours

The long-held belief that 10 p.m. To 2 a.m. Is the “golden period” for sleep, due to growth hormone secretion, is also being challenged. Growth hormone is primarily released within the first three hours of sleep, meaning the duration of sleep is more vital than the specific time window. Prioritizing sufficient sleep each night is crucial for overall health.

Nails and Hair: Already Dead Cells

Contrary to popular belief, the cells that make up nails and hair are already dead. Nails and hair are composed of keratinocytes, cells filled with the protein keratin. As new cells are produced, the older ones become keratinized and die, being gradually pushed out.

Because these cells are already dead, cutting or trimming them doesn’t cause pain or bleeding. However, the nail root and hair bulb are alive and contain nerves and blood vessels, so pulling them out can be painful and cause bleeding.

The Power of a Smile

Smiling has significant health benefits. Research shows that smiling increases the activity and number of “natural killer cells” in the body, which can inhibit cancer cells and fight off viruses. Laughter also releases endorphins, relieving stress and exercising facial muscles. A positive outlook can contribute to overall well-being.

The Impact of Praise on Brain Function

Positive reinforcement, such as praise, can enhance brain function. When we receive compliments, the brain releases dopamine through a network of neurons called the “A10 nerves.” Dopamine boosts motivation, learning, and performance.

The Mystery of the Missing Human Tail

Humans once possessed tails, evidenced by the tailbone at the end of the spine, which is a remnant of a degenerated tail. The reason for its disappearance remains a scientific mystery. While tails aid in balance and movement, their loss in humans isn’t fully understood, even considering our upright posture.

The Enigma of “Forty/Fifty Shoulder”

Painful shoulder conditions, often referred to as “forty or fifty shoulder,” can affect individuals as early as their twenties. Officially known as adhesive capsulitis, this condition involves inflammation of the shoulder joint. The exact cause is still unknown.

Source: Adapted from information presented in “The Shocking Secret of the Human Body: Why Doesn’t the White Hair Regenerate After Pulling It Out?” by Ozaki Yu.