Research has shown that people with red hair perceive pain differently than others. They may be more sensitive to certain types of pain and can require higher doses of some pain-killing medications. However, studies suggest that their general pain tolerance may be higher.
Key Takeaways. Humans and mice with red hair have a different tolerance for pain because their skin's pigment-producing cells lack the function of a certain receptor. Lack of this receptor function causes changes that tip the balance between pain sensitivity and pain tolerance.
A McGill University study found that redheads could handle more electric shocks than those with different coloured hair. Other research discovered that gingers are better at handling stabbing or sharp pain.
Red Hair May Be Good for Your Bones
Throughout history, the “ginger gene” likely protected many redheads against rickets, a disorder that softens and weakens bones due to vitamin D deficiency, according to Professor Jonathon Rees of the University of Edinburgh.
The skin of a redhead is thinner compared to others and is derived from the ectoderm. Teeth enamel is also derived from the ectoderm and thus is thinner than usual. Since the enamel coating is thin, the inner layer of tooth-dentin is more visible and offers a yellowish appearance.
Redheads are harder to sedate, but they have a different tolerance for pain, says UCI Health pain management specialist Dr. Shalini Shah. “Classic anesthesia literature has documented that redheads require more anesthesia,” she says.
Some evidence suggests redheaded adults often appear older than their actual age. For example, one study published in 2016 in Current Biology found that adults who carry two copies of the MC1R gene variant are more likely to look two years older than other people their age.
Lifespan: up to 20 years in captivity, 5-10 years in the wild.
One of the many facts about redheads is that their hair will never turn grey. The pigment in their hair that causes it to be red will just fade over time, causing their hair to turn blonde or white, but never grey.
Not only are they more likely to burn when the mercury rises, but they also feel the most pain when it drops. Researchers at Louisville University in Kentucky have discovered that people with ginger hair are more sensitive than most.
The conclusions come from a survey of 10,878 white Americans asked about their natural hair colour (Hispanics and African Americans were excluded to eliminate bias). The results showed the average IQ of blonde-haired women was 103.2, 102.7 for brown hair, 101.2 for red hair and 100.5 for black hair.
People with red hair also respond more effectively to opioid pain medications, requiring lower doses. People with red hair have a variant of the melanocortin-1 receptor (MC1R) gene.
Reds have fewer and thicker strands than blondes and brunettes. On average, redheads have about 90,000 strands, blondes 110,000, and brunettes 140,000. Because each fiery strand is significantly thicker and coarser than its color counterparts, it makes hair look fuller and easier to style.
Even today, some doctors believe that African-Americans are more tolerant of pain. One study found that relative to other racial groups, physicians are twice as likely to underestimate black patients' pain.
According to an article by evolutionary biology professor Mark Elgar, PhD, of the University of Melbourne, blue-eyed redheads are the absolute rarest, with 0.17% of the population having that combination of hair and eye color.
There's more research on the variations in human hair color than you might expect, and the science makes it clear that crimson locks are not becoming increasingly rare, nor will they disappear any time soon. It's a trait that dates to prehistory.
The rarest natural hair colour is red, which makes up only one to two percent of the global population. You commonly see these hair colours in western and northern areas of Europe, especially Scotland and Ireland. However, natural redheads may not exist for much longer.
Less than 2 percent of the world's population has red hair, making it the rarest hair color in the world. It's the result of the mutated MC1R gene. If both parents carry that gene, their child has a 25% chance of getting lovely, red locks, even if the parents don't have red hair themselves.
And when you meet a red head with blue eyes, you are looking at the rarest colour combination of all for human beings. Around 17 per cent of people have blue eyes, and when combined with 1-2 per cent having red hair, the odds of having both traits are around 0.17 per cent.
Redheads probably won't go grey. That's because the pigment just fades over time. So they will probably go blonde and even white, but not grey.
Strawberry blonde therefore belongs to the red hair group. 'Strawberry blonde is the lightest shade of red hair. Other tones in this color group include mahogany, copper and Irish red. When somebody says they have strawberry blonde hair, they're stating their shade of red.
Final Thoughts on Redheads and Alcohol Tolerance
There's not enough evidence to claim redheads have a higher tolerance to alcohol than other people. However, several social and genetic factors (including the MC1R mutation) may lead to a perception that they have a high tolerance and a predisposition to alcoholism.
The genetic link
A gene called MC1R plays a role in whether someone will have red hair. People who have certain variants in this gene are more likely to have red hair because they have higher levels of pheomelanin.