Many people notice extra hair shedding in the colder months and often chalk it up to the natural seasonal cycle. While weather changes can play a part, they aren’t always the whole explanation. In some cases, hair loss may signal an underlying issue—such as a deficiency in essential nutrients, including vitamin D.
Vitamin D is vital for overall health. It supports strong bones, boosts the immune system, and promotes healthy skin. Yet, many people have low vitamin D levels—especially during fall and winter, when sunlight exposure drops. Because our bodies produce vitamin D through sunlight, shorter days and more time indoors can easily lead to a deficiency without us realizing it.
In addition to its general health benefits, vitamin D is linked to hair growth. It helps nourish hair follicles—the tiny structures that produce hair. Low levels can disrupt the natural hair growth cycle, potentially causing increased shedding or slower regrowth. While it isn’t the only factor behind hair loss, vitamin D can be a key piece of the puzzle.
Maintaining healthy vitamin D levels supports overall wellness and may improve hair health. Simple steps like getting sunlight, eating vitamin D–rich foods, or speaking with a healthcare professional about supplements can help. If hair loss seems persistent or more noticeable than usual, it’s worth considering whether your body is getting the nutrients it needs—rather than attributing it solely to the seasons.
