❓ why
Why do some people have freckles?
Human BodyGenetics
Quick Answer
Freckles form when certain skin cells produce more melanin in response to sunlight. They are more common in people with variants in the MC1R gene.
The Full Story
Freckles are small spots of concentrated pigment that become more visible with sun exposure. They develop because melanocytes produce melanin unevenly in certain areas of the skin. A well-known genetic factor linked to freckles is variation in the MC1R gene, which is also associated with red hair and fair skin. Freckles often become darker in summer and lighter in winter. They are harmless in most cases, though skin changes should still be monitored like any other pigmentation change.
Key Facts
1.Sunlight makes freckles more visible
2.MC1R variants are strongly linked to freckles
3.They often fade in winter
YouTube Angle
Suggested video title for this topic:
"Why do some people spot up in the sun while others don’t?"