Those small brown or reddish spots that adorn many people's faces have been a source of fascination, and sometimes insecurity, throughout history.
Nowadays, freckles are considered a unique and beautiful trait. However, behind that constellation of tiny dots on your nose and cheeks lies a fascinating story of survival and biology.
The origin of freckles: Genetics or sun exposure?
Our body produces melanin, the pigment responsible for giving color to our skin, hair, and eyes. When you are exposed to the sun, your skin produces more melanin as a protective shield to defend your cells from sun damage.
In most people, this melanin is distributed evenly, resulting in an even tan. However, if you are prone to getting freckles, your protective cells group together in small clusters. When the sun touches them, they darken, forming those famous spots.
The MC1R gene: The "switch" for freckles and red hair
If freckles were a movie, the MC1R gene would be the star director. This gene is responsible for providing instructions to your cells to manufacture a key receptor that regulates the type of melanin your body produces.
There are mainly two types of melanin: eumelanin (dark shades that protect well against the sun) and pheomelanin (reddish or yellowish shades that offer less protection).
The MC1R gene works like a switch. If the receptor is activated, you produce more eumelanin. But if you have certain mutations in this gene that reduce receptor activation, more pheomelanin is produced.
This explains not only the appearance of freckles, but also why the genetics of freckled skin is so closely linked to the likelihood of having red hair or blonde hair, and to fairer skins that are more vulnerable to radiation.
Can freckles be inherited?
If one of your parents has freckles, it is very likely that you will develop them too. The predisposition to have these clusters of melanin is passed down from generation to generation.
As a strongly hereditary trait, looking at your family can give you great clues about your skin's natural ability to defend itself against the sun's rays.
Myths and truths about freckled skin
It's time to debunk some beliefs with science in hand:
- Myth: You are born with freckles. False. No baby is born with freckles. They appear during childhood, usually after the first direct exposures to the sun.
- Truth: They indicate greater sensitivity to the sun. Freckled skin tends to burn faster. If you have freckles, using sunscreen daily is not optional—it's a medical necessity.
- Myth: Freckles are dangerous. False. Freckles themselves (ephelides) are completely benign. However, having them means your skin is more susceptible to sun damage.
- Truth: They disappear or lighten in winter. As exposure to UV rays decreases during the colder months, freckles tend to temporarily fade.
Knowing how your skin will react to the sun shouldn't be a guessing game. Understanding your genetics allows you to better protect yourself and prevent epigenetic aging or serious dermatological problems.
With the tellmeGen DNA test, you can put doubts behind you. Through a simple saliva sample from the comfort of your home, you will have access to a comprehensive analysis of your body.
