Hair loss is becoming an increasingly worrisome issue for both men and women. To foster strong hair growth and prevent hair loss, there are numerous crucial factors, and the significant role of vitamin D cannot be overlooked. Vitamin D deficiency can render the hair weak, thin, and prone to breakage, complicating the recovery process. In this article, we will explore the relationship between vitamin D and hair loss, examine whether a vitamin D deficiency can contribute to hair loss, and if so, how to address and improve the situation. Keep reading!


Vitamin D deficiency can result from various factors. Insufficient exposure to sunlight is a primary cause, as the skin produces vitamin D when exposed to sunlight. People with limited sun exposure, those living in high latitudes, or individuals with darker skin may be at a higher risk. Inadequate dietary intake of vitamin D-rich foods, such as fatty fish, fortified dairy products, and egg yolks, can contribute to deficiency. Certain medical conditions that affect nutrient absorption in the gut, like celiac disease or Crohn’s disease, can also lead to vitamin D deficiency. Additionally, obesity, age, and kidney problems may impact the body’s ability to convert vitamin D into its active form. Consulting with a healthcare professional can help identify specific causes and determine appropriate interventions.


There is evidence suggesting that a deficiency in vitamin D can contribute to hair loss and other hair-related issues. Vitamin D plays a role in stimulating the growth of hair follicles, and insufficient levels of this vitamin in the body may impact the health of the hair.

 Vitamin D is an essential nutrient that aids in calcium absorption, found in foods and produced when the skin is exposed to sunlight. Vitamin D deficiency can occur when there is insufficient intake from food or supplements, or if the body is unable to absorb it properly. Several theories explain why a lack of vitamin D may lead to hair loss. Some suggest that vitamin D maintains the health of hair follicles, and when vitamin D levels decrease, the follicles may become damaged and shrink, resulting in hair loss. Another possibility is that vitamin D deficiency may increase the production of the hormone prolactin, which is linked to hair loss and can affect the normal hair growth cycle. Vitamin D deficiency is treatable, and addressing the deficiency may help prevent hair loss. However, it is advisable to discuss with a doctor or healthcare professional regarding medical history and medications before attempting any hair loss treatment methods.

A study published in the journal Dermatology and Therapy in 2017 examined data from over 2,000 individuals. The study revealed that people experiencing hair loss had significantly lower levels of vitamin D compared to those without hair loss. The results indicated that individuals with hair loss had an average vitamin D concentration of 20 ng/mL, while those without hair loss had an average vitamin D concentration of 26 ng/mL. Vitamin D levels below 20 ng/mL are considered deficient.


Vitamin D plays a multifaceted role in nurturing the health of your hair, operating as a subtle conductor orchestrating activities within your follicles. Its impact encompasses several key aspects. In the realm of hair growth, vitamin D interacts with cells in the hair follicles, activating them and promoting robust growth.  When it comes to preventing hair loss, vitamin D takes on the role of regulating the hair cycle.  The anti-inflammatory properties of vitamin D are instrumental in supporting follicle health. By mitigating inflammation around hair follicles, it creates a conducive environment for growth, averting damage that could potentially lead to hair loss. Beyond its impact on hair, vitamin D acts as a booster for overall immunity and health. Strengthening the immune system, it may provide a shield against stress-related hair loss while indirectly contributing to the general well-being of your hair.

Symptoms of Low Vitamin D

Individuals with a vitamin D deficiency may exhibit no symptoms, or their symptoms may be nonspecific and evolve over time. Common symptoms of a vitamin D deficiency comprise:

  • Changes in mood, such as depression or anxiety.
  • Frequent fractures.
  • Slow wound healing.
  • Loss of bone density.
  • Muscle weakness.
  • New or worsening high blood pressure.
  • Constant fatigue.
  • Chronic pain.
  • Infertility.
  • Decreased endurance.

The primary causes of a vitamin D deficiency are a lack of sunlight exposure or insufficient consumption of foods rich in vitamin D. However, some individuals may experience vitamin D deficiencies due to underlying conditions like Crohn’s disease or celiac disease, hindering proper nutrient absorption.

How Can You Treat Vitamin D Deficiency?

The most effective treatment for a Vitamin D deficiency is supplementation. Vitamin D supplements are best taken with meals, especially those rich in healthful fats, as fat aids in the absorption of the vitamin into the body. Dietary sources of good fats include avocado, eggs, chia seeds, certain fish (such as salmon, trout, and sardines), nuts, and cheese. Supplements are available in various forms, with recommended frequencies ranging from daily to monthly. Regular blood tests are conducted by doctors when treating low vitamin D levels to monitor progress.

The Endocrine Society recommends a daily intake of 600 IU of vitamin D for adults aged 19 to 55, with the unit “IU” denoting international units. Adults over 55 are advised to aim for between 600 and 800 IU per day, while children are recommended to receive between 400 and 600 IU daily. If an underlying condition is causing the deficiency, such as Crohn’s or celiac disease, addressing the primary condition is crucial. These diseases can impede the absorption of vitamin D from food. 

The 2019 study, conducted as a double-blind, randomized, placebo-controlled trial, aimed to explore the effects of vitamin D supplementation on hair loss in 50 women with telogen effluvium (temporary hair loss). The findings indicated an enhancement in hair density for both the vitamin D supplementation group and the placebo group. However, the difference between these two groups did not reach statistical significance. This suggests that, in the context of this study, vitamin D supplementation did not show a significant impact on hair density compared to the placebo.


To address hair loss resulting from a vitamin D deficiency, individuals can initiate their first line of defense by spending 15 to 20 minutes outdoors daily and incorporating vitamin D-rich foods into their diet. Supplementing with a vitamin D supplement may also be considered to meet specific intake goals.

For those dealing with brittle or sparse hair, adopting gentle hair care practices is essential to prevent further breakage. This includes refraining from pulling the hair while brushing, avoiding tight hairstyles like ponytails, opting for a gentle and natural conditioner, and securing long hair in a loose braid before bedtime to minimize tangling.


In this article, we are confident that you have clearly understood whether can vitamin D deficiency cause hair loss. Vitamin D plays a crucial role in regulating the hair growth cycle, promoting healthy development, and reducing the risk of hair loss. If you are experiencing hair loss due to a deficiency in vitamin D, in addition to the recommended improvement measures, consider incorporating some home remedies such as regular exercise, maintaining a balanced diet, and reducing stress. These factors can significantly contribute to enhancing overall health and preventing continuous hair loss.


  1. How long does it take for vitamin D to stop hair loss?

The timeframe for vitamin D to alleviate hair loss can vary among individuals. Consistent vitamin D supplementation may take several weeks to months before noticeable improvements are observed. It’s essential to maintain a sufficient and consistent intake and monitor progress over time.

  1. How much vitamin D is good for hair loss?

There is no one-size-fits-all answer to the optimal vitamin D dosage for hair loss, as individual needs can vary. However, general recommendations from health authorities may provide guidance. The Endocrine Society suggests that adults aged 19-70 should aim for 600-800 IU (International Units) of vitamin D per day.

  1. Are there other vitamins or nutrients that work synergistically with vitamin D for better hair health? 

Vitamins A, E, C, K, and B vitamins (Biotin, B12, Niacin) complement vitamin D for healthier hair. They aid in sebum production, act as antioxidants, support collagen, maintain follicles, and ensure overall hair health. Balanced intake ensures optimal hair well-being.