Vitamin D Deficiency & Hair Loss: Follicle Signaling Guide

Vitamin D deficiency is a well-established risk factor for hair loss. Vitamin D receptors play a vital role in follicular function, and a deficiency can lead to disturbance in your hair growth cycle and premature shedding. 

Common causes of vitamin D deficiency include insufficient sun exposure, a lack of vitamin D-rich foods in your diet, and other health-related conditions. The good news is it’s fixable. Vitamin D deficiency can be addressed through oral supplementation, dietary changes, and sun exposure.

So if you're looking for answers to any pressing questions like, ‘Does vitamin D deficiency cause hair loss?’ or ‘Can hair loss due to vitamin D deficiency be reversed?’, then we recommend you continue reading this article.

There is a key connection between vitamin D and hair. The nutrient is considered essential to human life, especially for hair health. But let's first understand what vitamin D is. 

What is vitamin D? 

Vitamin D is a fat-soluble vitamin with anti-inflammatory and immunomodulatory properties. The nutrient is necessary for strengthening the immune system, regulating calcium metabolism and promoting bone growth. In addition, it plays a role in the hair cycle, signalling hair growth and the differentiation of hair follicles. 

Understanding vitamin D deficiency

Vitamin D deficiency occurs when your body doesn’t receive enough of this essential nutrient, thereby weakening the hair growth cycle. This eventually leads to excessive hair fall or stunted hair growth. 

While you may know how vitamin D deficiency causes hair loss, did you know the underlying cause for this deficiency is diet or lifestyle? Let’s get to know what causes vitamin D deficiency around the world. 

Causes & prevalence of vitamin D deficiency globally 

Vitamin D deficiency is estimated to affect over 1 billion people globally, and usually occurs in individuals who work indoors, the elderly, vegans, pregnant women, and those with highly pigmented skin. Vitamin D deficiency is caused by several factors, including: 

• Limited exposure to sunlight
• Poor diet 
• Age
• Obesity
• Pigmented skin
• Excessive use of sunscreen 
• Certain medications
• Other health conditions like liver or kidney disorders, malabsorption syndromes, Crohn’s disease, celiac disease, inflammatory bowel disease, rheumatoid arthritis, and lupus.

While there are numerous factors that give rise to vitamin D deficiency, it is imperative to be aware of the hair loss pattern it can lead to before going ahead with any treatment or diagnosis. 

Vitamin D deficiency hair loss pattern

Vitamin D deficiency is associated with various types of alopecia, occurring in both men and women, including: 

• Alopecia areata
• Telogen effluvium
• Androgenetic alopecia
• Scarring alopecia

Hair loss due to vitamin D deficiency can easily be spotted on your scalp. Thinning hair, patchy hair loss, failure of hair regrowth after shedding, and a U-shaped hair fall pattern are noticeable. 

A 2024 study has noted low vitamin D levels in people with alopecia, particularly alopecia areata and female pattern hair loss. This established link makes it clear that vitamin D plays a critical role in supporting your hair growth cycle and the creation of new hair follicles. 

The link between Vitamin D and hair growth

Vitamin D deficiency effects on hair have been substantiated by several studies globally. So hair specialists may assess the nutrient deficiency when evaluating your hair loss and suggest appropriate treatment options. 

Role of vitamin D receptor in hair growth 

Vitamin D receptors are present in your hair follicles. These receptors contribute to the overall health of each follicle by creating new hair follicles and supporting their growth. A vitamin D deficiency can cause hair follicles to enter the resting phase early, leading to excessive hair fall if your vitamin D levels are low. 

Does vitamin D deficiency cause hair loss?

Your hair follicles interact with vitamin D, wherein your hair actively grows in the presence of this vital vitamin during the anagen phase. When there’s a vitamin D deficiency, the anagen phase is disturbed, and your hair goes into the resting phase, resulting in excessive shedding. 

Although other vitamin deficiencies are known to contribute to hair loss, vitamin D deficiency is directly linked to your hair health. This makes vitamin D deficiency the most sought-after topic for those suffering from vitamin D deficiency hair loss. And if you’re one of them, optimising your vitamin D intake can make your hair transform from excessively thin strands to gorgeous locks that you can style as you please.

Symptoms of vitamin D deficiency

There are certain obvious symptoms to look out for in vitamin D deficiency. However, getting to know them is a great starting point for you in addressing it immediately. The symptoms include:  

• Dry skin and nails
• Weakened muscles
• Weight gain
• Brittle bones
• Fatigue 
• Slow wound healing
• Depression or mood swings
• Chronic illnesses and infections 

Are you at risk of vitamin D deficiency? 

The symptoms mentioned above can help you identify a vitamin D deficiency in your body. These risk factors can be accounted for early on and treated effectively. Although the risk is minimal and can be curtailed by consulting a healthcare professional, having your vitamin D levels checked and supplementing them if there’s a deficit may prove to be of great help to your hair health.

 Traya’s Ultimate Hair supplements combo provides the much-needed nourishment to your hair through Hair Ras and Hair Vitamin doses. These supplements are backed by the science of Dermatology and made using Ayurvedic ingredients essential for revitalising your hair health. 

Diagnosing vitamin D deficiency

A doctor may help you paint an accurate picture of your vitamin D deficiency by testing your blood samples. A serum 25-hydroxyvitamin D test may be suggested to check if the vitamin D level in your blood is optimal. This blood test can provide a comprehensive overview of the vitamin D levels in your blood. 

According to the Endocrine Society, a 25-hydroxyvitamin D level greater than 30 ng/ml is considered to be optimal. However, always consult an expert who’ll review your medical history, vitamin D levels in your blood, and other factors before deciding whether supplementation is needed or not to treat your vitamin D deficiency. 

Treating hair loss due to vitamin D deficiency 

Once you diagnose the symptoms and know it’s a vitamin D deficiency, there’s so much you can do to effectively treat the hair loss. But don’t be overwhelmed. You’ll be able to deal with it easily if you know about the wide list of treatment methods available to you. Let's take a look at these treatment options: 

Exposure to sunlight 

Sunlight is the greatest natural source of vitamin D. So use this as a sign to head out and receive adequate sun exposure. 

Making modifications to your diet

Another way to maintain optimal levels of vitamin D is by including vitamin D-rich foods in your diet. Natural sources of vitamin D include:

• Cod liver oil 
• Salmon 
• Mackerel
• Tuna fish
• Swordfish
• Sardines 
• Eel
• Caviar or fish roe
• Mushrooms 
• Egg yolks
• Fortified milk

Maintaining a balanced diet can prevent vitamin D deficiency, which can lead to rampant hair loss. 

Taking Vitamin D supplements

Hair loss due to vitamin D deficiency can be brought under control with supplemental treatment that normalises the vitamin D levels. When it’s difficult for you to make necessary dietary adjustments or obtain vitamin D through sunlight, oral supplements are the ideal option. 

Seeking expert support

Vitamin D deficiency can be easily spotted when you notice the symptoms we had listed earlier. But if you’re facing trouble dealing with the vitamin D deficiency symptoms of hair loss, consider visiting a specialist who can provide appropriate oral supplementation, suggest dietary modifications, and suggest treatment options by evaluating your hair and blood samples. 

Tips to prevent hair fall caused by vitamin D deficiency

An expert may help you deal with this hair loss, but there are certain things that you need to introduce in your daily routine to reduce hair breakage. So stop looking for alternatives on how to stop hair fall due to vitamin D deficiency, when you can do it yourself using these tips: 

• Manage your stress levels – Hair loss can be prevented by reducing your stress levels and bringing them under control. Chronic stress can significantly hamper your hair growth. 
• Follow a hair care routine – This includes avoiding the use of excessive styling equipment, avoiding tight hairstyles and ponytails, and using gentle and natural shampoos to wash your hair. These are simple things, but they can prove really effective in preventing hair breakage. You can also indulge in a scalp massage to improve the blood circulation to your hair follicles. 
• Having a balanced diet – Incorporate a balanced diet filled with essential vitamins and minerals like protein, omega-3s, antioxidants, iron, zinc, etc.

We’ve all been through hair loss at some point in life. It takes a toll on you, and we completely understand. However, when you seek the right treatment options and address the underlying problems, you might just be able to manage it effectively. Knowing the root cause of the hair fall might empower you to work in that direction and prevent any further damage to your scalp.

Frequently Asked Questions 

1. What deficiency causes hair loss? 

Your hair needs essential nutrients like vitamin D, vitamin B12, biotin, folate, or riboflavin. Deficiency of any of these nutrients may cause hair loss. 

2. Is vitamin D the only reason for hair loss? 

No, genetics, stress, hormonal imbalance, and other nutrient deficiencies can also be the cause of hair loss. 

3. Can vitamin D supplements help with hair growth? 

Oral supplements can only fulfil your vitamin D deficiency and cannot promote hair growth by themselves. 

4. How to take vitamin D supplements? 

These supplements are to be taken orally based on the advice of your doctor. 

5. How much vitamin D should I take daily? 

For people older than 70, it is recommended to take at least 20 micrograms of vitamin D. On the other hand, all those aged 1 to 70 require 15 micrograms of vitamin D. 

6. Is excessive vitamin D intake harmful?

Vitamin D can prove to be toxic in some rare cases, as it can lead to hypercalcemia, a condition involving the buildup of excessive calcium in your bloodstream. This can get deposited in your arteries. Too much vitamin D can also give rise to kidney stones in some people. 

7. Can hair loss due to vitamin D be reversed?

Yes, hair loss can be reversed and brought to normalcy in a few months of consistent treatment, which includes vitamin D supplementation, hair care, and dietary changes. 

8. Why is vitamin D deficiency so common? 

There are multiple reasons why the deficiency is a common occurrence globally. They are: 

• Lifestyle 
• Dietary habits
• Food preferences

References:

1. https://pubmed.ncbi.nlm.nih.gov/34553483/ 
2. https://ishrs.org/vitamin-d-deficiency/ 
3. https://www.ishrs-htforum.org/content/32/4/113.full 
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC8759975/ 
5. https://pmc.ncbi.nlm.nih.gov/articles/PMC1876678/ 
6. https://medlineplus.gov/ency/article/003569.htm%23:~:text%3DWhy%2520the%2520Test%2520is%2520Performed%26text%3DThis%2520test%2520is%2520done%2520to,Crohn%2520disease%252C%2520or%2520celiac%2520disease&sa=D&source=docs&ust=1776953051431008&usg=AOvVaw0eSxdLxuXtuyLfzA7DdxZw

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