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What are vitamin D deficiency symptoms?

The "sunshine" vitamin is a hot topic. You may have recently found out that you are deficient or know someone who is. It's shocking for most people when they have never had a problem before and believe nothing has changed to make it a problem now.

vitamin D
Known as the “sunshine vitamin,” vitamin D is a vitamin you can get from food or supplements. Exposure to the sun also stimulates vitamin D production in the skin.

Vitamin D serves several important functions in the body. This include:

promoting calcium absorption, maintaining normal calcium and phosphate levels, improving bone and cell growth, reducing inflammation.

According to Harvard University, an estimated 1 billion people are low in vitamin D. Vitamin D deficiencies can cause short-term symptoms and long-term complications.

Several factors have contributed to the rising incidence of vitamin D deficiency. This includes: wearing sunscreen (sunscreen blocks the sun’s ability to stimulate vitamin D production), not spending enough time outside, having darkly pigmented skin, which won’t absorb the sun’s rays as well, exclusively breastfeeding babies for prolonged time periods, being obese, which typically raises your vitamin D requirements

Some people are born without the ability to process vitamin D. Other people have medical conditions that keep them from digesting vitamin D well.

Vitamin D deficiency doesn’t always cause symptoms. When it does, some of the symptoms may include: difficulty thinking clearly, bone pain, frequent bone fractures, muscle weakness, soft bones that may result in deformities, unexplained fatigue.

Vitamin D deficiencies don’t always cause symptoms until levels get very low or have been low for some time. This can make the condition difficult to diagnose.

READ ALSO: What are foods with vitamin D?

vitamin D

How is vitamin D deficiency diagnosed?

Your doctor will start by taking your health history to determine if you’ve been experiencing symptoms that could indicate vitamin D deficiency.

A physician will likely order a blood test for the serum concentration of 25(OH)D. This is the type of vitamin D that circulates in the blood. It’s considered a good reflection of how much vitamin D you’ve absorbed from sun exposure and taken in from foods.

If your vitamin D levels are low and you’re having symptoms of bone pain, a doctor may recommend a particular scan to check for bone density. Doctors use this painless scan to evaluate a person’s bone health.

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What are the complications of vitamin D deficiency?

Researchers still aren’t sure of all the possible complications of vitamin D deficiency.

One study found that vitamin D deficiency was a contributing factor in recurrent major depressive disorder with seasonal patterns. This is a form of depression that only occurs during certain times of the year.

Another study found that vitamin D deficiency was linked to the faster growth of breast cancer cells in mice.

Doctors do know that vitamin D deficiency can cause:

impaired immune system functioning, which puts you at a higher risk for infection,

rickets, a condition that most commonly occurs in children that cause bone softening,

insulin resistance, which affects your ability to use insulin to process blood sugar,

Thin or brittle bones which increases your risk for osteoporosis.

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Vitamin D deficiency symptoms and treatment

Doctors often treat vitamin D shortcomings by prescribing or recommending vitamin D supplements. The amount you should take usually depends on how low your vitamin D levels are. For example, some people may reach their vitamin D intake by taking a multivitamin. These usually have between 400 and 800 IU of vitamin D with each serving. However, individuals who are very deficient in vitamin D may need higher levels of supplementation — about 1,000 IU per day. Ask your doctor how much vitamin D you need every day.

The ODS recommends the following dietary allowances for eating foods that contain vitamin D as well as taking supplements:

ages 0 to 12 months: 400 IU

ages 1 to 70 years (including pregnancy and lactating): 600 IU

ages 70 and older: 800 IU

Few unfortified foods in a person’s diet are high in vitamin D. Foods that are naturally high in vitamin D include:

fatty fish, such as mackerel, salmon, and tuna, beef, cheese, egg yolks, fish liver oils, mushrooms.

However, food manufacturers often add or fortify foods with vitamin D. Examples include: milk, breakfast cereals, yogurt, orange juice, margarine.

Manufacturers also add vitamin D to some infant formulas to reduce the risk that infants will have low levels.

It’s also possible to increase vitamin D levels by going outside more. About 15 minutes of sun exposure (without sunscreen on) is usually enough to build up vitamin D levels. Several factors can influence the amount of sun exposure you get, including the time of year, cloud cover, and the time of day (the sun’s rays are more direct during the middle of the day). Another consideration is that ultraviolet B radiation can’t penetrate glass. This type of radiation is what stimulates vitamin D production. So even if you’re taking in sunlight through a window, you won’t get the benefit of vitamin D production.

Sunscreen is still imperative to your health. If you’re going to be outside for longer than 15 minutes, you should wear sunscreen to protect against the sun’s damaging rays. 

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What is the outlook for someone with vitamin D deficiency?

It’s important to know that vitamin D deficiency usually can’t be “cured” overnight. Also, it is possible to take too much vitamin D. There are two kinds of vitamins: water-soluble and fat-soluble.

Fat-soluble vitamins (like vitamins A, D, and E) are stored in the body’s tissues. Water-soluble vitamins (like vitamins B and C) aren’t usually stored in the body. This means that fat-soluble vitamins can build up to excess levels in the body, possibly causing side effects like damage to the kidneys and heart.

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How can vitamin D deficiency be prevented?

Some step you can take to maintain healthy vitamin D levels include:

getting out in the sun without sunscreen on for 15 minutes each day

taking a multivitamin that contains vitamin D

eating foods that are high in vitamin D

purchasing and eating foods that are fortified with vitamin D, such as cereals and milk

Eating a healthy diet with fortified foods and getting some sun exposure when possible can help you keep your vitamin D at healthy levels.

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