Tag

Red Hair

All articles tagged with #red hair

Redheads Aren't Going Extinct, Genes Keep the Flame Alive
science1 month ago

Redheads Aren't Going Extinct, Genes Keep the Flame Alive

Live Science debunks the extinction myth: red hair stems from a recessive MC1R variant that can persist in the population through carriers who don’t display red hair themselves. While redheads are a small minority (under 2% globally) and have higher melanoma risk, there’s no evidence the trait is disappearing; frequency may fluctuate with migration, but as long as MC1R variants exist in the gene pool, redheads aren’t going extinct.

World Redhead Day 2026 spotlights red hair’s genetics and quirky facts
world3 months ago

World Redhead Day 2026 spotlights red hair’s genetics and quirky facts

World Redhead Day on May 26 shines a light on red hair—with fewer than 2% of people having it and Scotland and Ireland as hotspots—while noting eight genes, including MC1R, influence red hair; the rare blue-eyed redhead combo occurs about 0.17%, redheads may require about 20% more anesthesia, produce more vitamin D, are often overrepresented in ads, and the hair color isn’t going extinct.

Redhead Genes Show Immune Perks, But Higher Autoimmune Risks
science4 months ago

Redhead Genes Show Immune Perks, But Higher Autoimmune Risks

A Harvard Medical School study of ancient DNA from about 16,000 people over 10,000 years finds that the genetic variants behind red hair and fair skin may confer immune benefits (including potential HIV resistance and leprosy resistance) and lower arthritis risk, but also raise the risk of Crohn's disease and celiac disease due to gluten sensitivity, suggesting a trade‑off shaped by ancient selection and the spread of wheat farming.

Redhead Genomics: Immune Perks But Gluten-Linked Health Tradeoffs
science4 months ago

Redhead Genomics: Immune Perks But Gluten-Linked Health Tradeoffs

Harvard Medical School researchers analyzed 10,000 years of DNA from about 16,000 people and found that the genetic variants behind red hair and fair skin were favored by natural selection, with potential immune benefits (including HIV resistance and leprosy resistance) and lower risk of certain conditions, but these same genes may raise the risk of gluten-related autoimmune diseases such as Crohn’s disease and celiac disease, possibly linked to the advent of wheat farming; vitamin D production advantages were noted in earlier work.

science4 months ago

Farming Fueled Rapid Human Evolution, Favoring Red Hair and Leaner Bodies

A large ancient-DNA study of nearly 16,000 West Eurasian individuals finds that natural selection accelerated in the last 10,000 years as farming spread, identifying 479 gene variants tied to traits such as red hair, lighter skin, and lower body fat, with some links to modern diseases like type 2 diabetes and schizophrenia; the researchers have made their dataset public to enable broader cross-population analysis.

Ancient DNA uncovers ongoing human evolution: lighter skin, red hair, and reduced baldness in West Eurasia
science4 months ago

Ancient DNA uncovers ongoing human evolution: lighter skin, red hair, and reduced baldness in West Eurasia

A Nature study analyzing about 16,000 genomes across 18,000 years in West Eurasia shows natural selection acted on hundreds of gene variants, increasing light skin and red hair, boosting resistance to HIV and leprosy, and reducing susceptibility to male-pattern baldness and rheumatoid arthritis. The team’s AGES method reveals that recent human evolution continued beyond prior assumptions, with trait shifts likely tied to changing environments and pathogens; data and methods are openly shared to enable further research.

Ancient DNA Confirms Ongoing European Evolution, From Red Hair to Immune Traits
science4 months ago

Ancient DNA Confirms Ongoing European Evolution, From Red Hair to Immune Traits

A large study of nearly 16,000 ancient genomes and over 6,000 living people shows natural selection continued in Europe for more than 10,000 years, increasing red-hair/fair-skin genes and other advantageous variants while factors linked to disease risk fluctuated; selection intensified after farming, with vitamin D adaptation likely helping in low-sun climates, and some obesity-related genes being selected against. The work, focused on West Eurasia, challenges the idea that evolution slowed after modern humans settled into agriculture and is published in Nature.

Ancient DNA reveals selection for light skin, red hair, and immunity in West Eurasians
science4 months ago

Ancient DNA reveals selection for light skin, red hair, and immunity in West Eurasians

A Nature study of 18,000-year genomes from West Eurasians shows natural selection boosted lightweight-skin pigmentation, red hair, and resistance to HIV and leprosy, while lowering the frequency of male-pattern baldness and rheumatoid arthritis risk. Using a new method called AGES, researchers detected fine-scale directional selection over millennia and say patterns likely reflect changing environments and pathogens; the team plans to extend the approach to other regions like East Eurasia.