2. Hair loss
A hair loss that lasts for a long periode may be a sign of vitamin D deficiency.
If you are losing hair especially in the fall and winter when our body is less exposed to the sun, you may consider checking your vitamin D levels.
The thing is that the lack of vitamin D prematurely ages the hair follicles, making them unable to properly re-engage a new cycle of keratinization
This factor would interact with the other factors of hair loss classically listed: heredity, stress, ferric anemia, thyroid problems …
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