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Numerous studies have shown the link between Vitamin D and hair loss. This is because vitamin D is involved in diverse roles in processes like immune regulation, brain function and hormone production. It is also important for healthy hair growth. Low vitamin D can contribute to thinning hair and put you at risk for other health conditions. Genetic thinning tends to show in the frontal scalp whereas vitamin D related hair loss is across the entire scalp and shows improvement once the levels are restored.
What is vitamin D and how does it affect hair?
Vitamin D is required for creating cells that develop into hair follicles and is a fat-soluble vitamin synthesized in the epidermis (upper layer) of the skin. Vitamin D receptors are found in the hair follicle in the anagen, growth phase of the hair cycle supporting regulation of the natural hair cycle. When vitamin D binds to receptors in the hair follicle it supports the stimulation of new hair follicle production; activates hair growth phases and supports scalp health and circulation. It is involved in the production of keratin, a key protein component of hair.
Some studies have shown that vitamin D can prevent some of the growth-inhibiting effects of the hormone di-hydrotestosterone (DHT) on genetic thinning. There is evidence to suggest that vitamin D exerts an anti-inflammatory and immunoregulatory effect and this is linked to autoimmune type hair loss conditions such as alopecia areata. The symptoms that show in the hair can present as thinning across the entire scalp. Noticeable shedding when washing (more than usual). Hair may grow slower and reduce in thickness and density.
Sources of vitamin D
Vitamin D is obtained from diet or synthesized by skin from sun exposure and is one of the best ways for the body to produce vitamin D. Spending too little time outdoors deprives the skin of UVB rays needed for vitamin D synthesis. If someone is low, then vitamin D supplements may help but it is best to seek the advice of a health care practitioner. The standard daily recommendation is 600-800 IU for US adults, but deficient individuals might require higher doses temporarily, as advised by a healthcare provider. The best sources are oily fish such as salmon and mackerel. Egg yolk, mushrooms that have been exposed to UV light and fortified foods like milk, including dairy alternatives, orange juice, breakfast cereals and yogurts are also good sources.
Symptoms of vitamin D deficiency
Limited sun exposure, especially during the winter months, can contribute to vitamin D deficiency. Multiple studies have shown lower levels of vitamin D in patients experiencing a form of autoimmune hair loss known as alopecia areata. Although there appears to be a link between other types of hair loss, such as a temporary diffused hair loss caused by an interruption in the hair growth cycle known as telogen effluvium. Vitamin D plays a role in regulating the hair growth cycle, but low levels can cause hair to prematurely go into the telogen, resting phase of the hair growth cycle.
Weaken hair follicles from deficiency can lead to increased shedding and reduced thickness and strength of the hair fiber. As well as thinning hair or increased hair loss, sufferers may experience low energy levels, muscle weakness, reduced bone density and impaired memory and concentration. Low mood or seasonal depression is cited as a contributing factor to lower concentration of vitamin D.
The important thing is not to self-diagnose but seek advice from a healthcare practitioner if you’re concerned. Your doctor can review your medical history and may even order a blood test if they believe you are deficient of vitamin D. The general recommended level for vitamin D is up to 50 nanograms (ng/mL) but some individuals benefit with optimum levels up to but not exceeding 125ng/mL.
Treatments for hair thinning due to vitamin D
The cause of any hair loss needs to be determined before taking additional supplements. US guidelines recommend supplementation of around 600-800 IU, although those with darker skin may require more, especially in the winter period when there is less sunlight. Too much can cause toxicity, so stick to the daily recommended amount unless advised by a healthcare practitioner Furthermore, as we age the skin does not synthesize vitamin D as efficiently as kidney and liver conversion decline. Spend time outdoors to ensure your skin can absorb UVB rays for vitamin D synthesis. Keep to a healthy weight as being overweight can make less vitamin D unavailable to activate. Gut health is equally important as if impaired can affect the absorption of vitamin D.
Vitamin D may occur alongside other conditions, but it is important to take a comprehensive approach that addresses overall health. With the right treatment and regular vitamin D, improvements are typically seen in 3-6 months, though individual timelines differ based on deficiency severity, treatment response, and overall hair health factors. Supplements can help but it is important to work with your healthcare practitioner to ensure you have that right dose to avoid causing other health complications.
Meanwhile, you can support your scalp and hair health with the right products for hair thinning. Using a Nioxin System Kit specifically formulated for your level of thinning and hair condition will sustain the growth . (Support optimum growth). You can also use a leave-in serum that improves hair anchorage like Nioxin Hair Fall Defense Serum or Diamax Advanced, a serum that instantly makes the hair fuller looking.
Conclusion
Vitamin D like all nutrients is essential to maintaining healthy hair growth. There is accumulating evidence that vitamin D has some function in normal hair growth. Deficiency can have an adverse reaction on scalp health and is linked to thinning hair. Focus on maintaining your levels by monitoring, especially in the winter months when the is less sunlight.
Optimize your hair health by eating a balanced diet rich in hair-supporting nutrients. It can take several months or more to get levels back to normal if you have a deficiency. The good news is that hair loss as a result of vitamin D deficiency can be corrected in most cases with diet and treatment. Therefore, timely diagnosis and intervention are crucial for optimal results. The signs of changes should be investigated. If you’re worried don’t leave it too long as it can make it more challenging to treat.
Frequently asked questions
Is vitamin D good for thinning hair?
Vitamin D is vital for maintaining health, certain studies suggest a possible correlation between excessive intake of this nutrient and the thinning of hair. However, this effect remains far from universal, with individual reactions demonstrating considerable variation. Elevated vitamin D levels possess the capacity to disrupt the hair's natural growth cycle. Hair follicles progress through stages of active growth, inactivity and subsequent shedding. An imbalance stemming from vitamin D surplus may curtail the growth phase or hasten premature shedding, potentially causing discernible hair thinning.
What are 5 signs of vitamin D deficiency?
The 5 signs of vitamin D deficiency can be subtle but impactful. Fatigue is a common indicator, as vitamin D plays a role in energy production. Bone and muscle pain, particularly in the lower back, may signal insufficient vitamin D levels, as this vitamin is crucial for calcium absorption and bone health. Frequent infections or a weakened immune system can also point to a deficiency, since vitamin D supports immune function. Mood changes, such as depression or anxiety, have been linked to low vitamin D levels due to its involvement in brain function. Lastly, slow wound healing may suggest a deficiency, as vitamin D is needed for tissue repair and regeneration.
Is vitamin D hair loss reversible?
Vitamin D deficiency can lead to hair loss, but the good news is that this type of hair loss is often reversible. By addressing the deficiency through supplementation and dietary changes, individuals can often stimulate hair regrowth and restore their hair to its previous healthy state. It's essential to consult with a healthcare professional to determine the appropriate dosage and monitor progress.
Sources
https://pmc.ncbi.nlm.nih.gov/articles/PMC1876678/