It is well known that vitamin D can help thicken existing hair, according to Levitan. Vitamin D works by binding to certain receptors found in the hair follicle, which helps to regulate their function and stimulate cellular activity, particularly in the anagen phase of the hair growth cycle. When vitamin D levels are sufficient, it can create new hair follicles and promote healthy hair growth. On the other hand, a deficiency in vitamin D can disrupt the hair follicle cycle and lead to poor hair growth.
So how long does it take for hair to regrow after taking vitamin D supplements? The answer varies from person to person, depending on how low their vitamin levels were before taking the supplements. Generally speaking, it may take three to four months for the body to increase its levels of vitamin D and improve the symptoms of nutritional deficiency. Some studies have shown initial improvements in hair loss after one month of taking the supplements, but regenerating activity usually returns after three months of daily vitamin maintenance. Fortunately, hair loss due to vitamin D deficiency is often reversible.
Once vitamin D levels are increased, hair follicles will usually begin to function properly and hair will start to grow again. It may take several months for new hair growth to become visible, so patience is key. Low levels of vitamin D can be caused by spending too much time indoors, using a lot of sunscreen, or not eating foods that contain this nutrient. Hair loss and thinning problems can also be caused by other vitamin and nutritional deficiencies.
Researchers have even discovered a possible link between vitamin D deficiency and the development of certain types of hair loss. Micronutrients, including vitamins, play an important role in cell multiplication and the development of matrix cells in the hair follicle bulb. Vitamin D is mainly absorbed through exposure to the sun, but dietary supplements and certain foods can also increase your intake of this nutrient. Vitamin D deficiency has been linked to alopecia (localized baldness) and other health conditions.
One study found that a topical treatment with vitamin D was effective for hair loss in nearly 70% of participants. It is important to get the recommended dose of vitamin D daily; otherwise, you may become deficient. Some people may experience hair loss within a few months of being deficient in vitamin D, while others may not see any effect for another year. Eating a healthy diet with foods that naturally contain or are fortified with vitamin D can help improve your levels.
Although rare, vitamin D toxicity can cause hypercalcemia (excessive accumulation of calcium in the blood), which can lead to symptoms such as nausea, vomiting, and headaches. When taking vitamin D dietary supplements for alopecia or hair loss, it is best to consult with a doctor who can recommend the appropriate dose for daily consumption and monitor you for results and any side effects. The effects of vitamin D supplements on hair loss due to deficiency may not be seen for a few months.
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