Vitamin D Deficiency: Symptoms, Causes, and Solutions

BY Jaber Posted August 10, 2023 Update August 14, 2023
Vitamin D Deficiency: Symptoms, Causes, and Solutions

Learn about Vitamin D deficiency, its symptoms, common causes, and effective solutions to maintain your health. Find out more!

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Hey there! Have you ever thought about the role of vitamin D in your body? Probably not as much as you should! Vitamin D is a crucial nutrient that plays multiple roles in keeping you healthy and active. Unfortunately, many people suffer from vitamin D deficiency, often without even realizing it. In this article, we'll explore what vitamin D deficiency is, why it happens, its symptoms, and the impact it can have on your health. Let's dive in!

What is Vitamin D?

Vitamin D, often referred to as the "sunshine vitamin," is a fat-soluble nutrient that your body needs for various vital functions. One of its primary responsibilities is to maintain proper levels of calcium and phosphorus in your blood, promoting healthy bone development and overall bone health. You can obtain vitamin D from multiple sources, including sunlight, certain foods, and supplements.

  • Vitamin D2 (Ergocalciferol): Vitamin D2, also known as ergocalciferol, is a form of vitamin D that is derived from yeast and fungi. It is commonly used in vitamin D supplements, especially in those intended for vegans or vegetarians. Vitamin D2 is also found in some fortified foods, such as certain types of plant-based milk.
  • Vitamin D3 (Cholecalciferol): Vitamin D3, also known as cholecalciferol, is the form of vitamin D that is synthesized in the skin when it is exposed to sunlight. It can also be obtained from certain animal-based food sources, such as fatty fish (e.g., salmon, mackerel) and cod liver oil. Vitamin D3 is generally more potent and more effective at raising blood levels of active vitamin D compared to Vitamin D2.

Vitamin d deficiency icd 10

In the International Classification of Diseases, Tenth Revision (ICD-10), the code for vitamin D deficiency is E55.9. The "E" indicates that it falls under the category of "Endocrine, nutritional, and metabolic diseases," and "E55" specifically denotes "Vitamin D deficiency." The ".9" at the end represents an unspecified type of vitamin D deficiency.[1]

So, the ICD-10 code for vitamin D deficiency is: E55.9

How Does the Body Get Vitamin D?

Ah, the sunlight! Your skin has a fascinating ability to produce vitamin D when exposed to sunlight. Isn't it incredible how your body can create its own vitamin D? But don't worry if you're not a fan of the sun. You can still get vitamin D from your diet, especially from fatty fish, fortified dairy products, and egg yolks. If your diet falls short, vitamin D supplements can come to the rescue!

Factors Contributing to Vitamin D Deficiency

So, why do so many people end up lacking this essential vitamin? There are several factors at play. Firstly, not getting enough sunlight can be a significant contributor. People who spend most of their time indoors or live in regions with limited sunlight are at a higher risk. Additionally, individuals with darker skin tones naturally have more melanin, which reduces the skin's ability to produce vitamin D. Age, geographical location, and certain dietary choices can also impact vitamin D levels.

signs of vitamin d deficiency

Vitamin D, the "sunshine vitamin," is an essential nutrient that plays a vital role in maintaining your overall health. Unfortunately, many people around the world are deficient in this crucial vitamin without even realizing it. But fear not! In this article, we'll explore the top 14 signs that might indicate you're not getting enough vitamin D. So, let's dive in and shed some light on this critical issue!

Fatigue and Weakness

Feeling tired all the time? Vitamin D deficiency might be the culprit! When your body lacks this essential nutrient, it can lead to unexplained fatigue and weakness, making even the simplest tasks feel like a herculean effort.

Bone and Back Pain

Do your bones ache more often than usual? Vitamin D plays a key role in maintaining healthy bones by helping your body absorb calcium. Without sufficient vitamin D, your bones may become weak and more susceptible to pain and fractures.

Mood Swings and Depression

If you find yourself feeling down in the dumps frequently, vitamin D deficiency could be a contributing factor. Low levels of this sunshine vitamin have been linked to mood disorders like depression and anxiety.

Impaired Wound Healing

Have you noticed that your wounds take longer to heal than usual? Vitamin D plays a crucial role in the wound healing process, and deficiency may slow down the repair of damaged tissues.

Hair Loss

Are you experiencing hair loss? While various factors can contribute to hair loss, vitamin D deficiency has been associated with certain types of hair thinning and loss. Ensuring adequate vitamin D levels may promote healthier hair growth.

Muscle Pain and Weakness

Muscle pain and weakness can be indicative of several health issues, and vitamin D deficiency is one of them. This essential nutrient is necessary for muscle function, and when lacking, it may lead to discomfort and weakness.

Constant Respiratory Infections

Frequent bouts of colds and respiratory infections might be a sign that your immune system needs a boost. Vitamin D plays a crucial role in supporting the immune system and defending your body against infections.

Cardiovascular Issues

Your heart health can also be impacted by vitamin D deficiency. Research suggests a link between low vitamin D levels and an increased risk of cardiovascular problems.

Excessive Sweating

Unexplained and excessive sweating, particularly on the forehead, might be linked to vitamin D deficiency. Ensuring you have adequate vitamin D levels could help regulate your body's perspiration.

Gut Issues and Digestive Problems

Vitamin D is essential for maintaining a healthy gut lining and proper digestive function. Deficiency may contribute to gut-related problems and digestive discomfort.

Impaired Balance and Coordination

Have you noticed that your balance and coordination are off? Vitamin D is involved in maintaining neuromuscular function, and low levels could affect your balance and overall motor skills.

Chronic Pain

Chronic pain conditions, such as fibromyalgia, might have a connection to vitamin D deficiency. Ensuring sufficient vitamin D levels may help alleviate some of the discomfort associated with these conditions.

Slow Healing of Bone Fractures

If you've suffered a bone fracture and notice that it's taking longer than expected to heal, vitamin D deficiency could be a contributing factor. This essential nutrient is critical for proper bone repair.

Constant Fatigue After Exercise

Feeling excessively fatigued after exercise? While some post-workout tiredness is normal, persistent fatigue could be linked to vitamin D deficiency, as this vitamin plays a role in muscle recovery.

Health Risks Associated with Vitamin D Deficiency

Vitamin D deficiency goes beyond a lack of energy and achy bones. It can have more severe consequences on your health. For instance, inadequate vitamin D levels are linked to a higher risk of osteoporosis, a condition that weakens bones and makes them more prone to fractures. Furthermore, vitamin D plays a vital role in supporting your immune system, so deficiency might lead to an increased susceptibility to infections. Additionally, research has shown connections between low vitamin D levels and certain cardiovascular issues.

Diagnosing Vitamin D Deficiency

Curious about your vitamin D levels? The best way to know for sure is through a blood test that measures your serum 25(OH)D levels. Based on the results, your healthcare provider can determine if you're deficient or not. Keep in mind that recommended vitamin D levels can vary depending on age and certain health conditions.

Who is at Risk?

While vitamin D deficiency can affect anyone, some groups are more susceptible. Older adults, people with limited sun exposure, those with darker skin tones, and individuals with specific medical conditions may have a higher risk. Regular screenings can be crucial, especially if you fall into any of these categories.

Preventing Vitamin D Deficiency

The good news is that preventing vitamin D deficiency is often within your control. Getting moderate sun exposure is one of the best ways to boost your vitamin D levels naturally. Of course, always wear sunscreen and don't overdo it. On cloudy or winter days, when the sun is scarce, you can rely on dietary sources like salmon, sardines, fortified milk, and orange juice. If needed, vitamin D supplements can be a helpful addition to ensure you're meeting your daily requirements.

Treating Vitamin D Deficiency

If you are diagnosed with vitamin D deficiency, don't worry; it's usually treatable. Your healthcare provider may recommend a prescription vitamin D supplement to bring your levels back to normal. Regular monitoring and follow-up visits will ensure you're on the right track to optimal vitamin D levels.

Vitamin D and Immune System

Think of your immune system as a fortress, and vitamin D as the soldiers guarding the walls. Vitamin D plays a crucial role in supporting your immune system and helping it fight off infections. It's like having an army of protectors inside you!

Vitamin D and Mental Health

Have you ever noticed feeling down during the winter months when the sun hides away? That could be related to vitamin D! Research suggests a link between vitamin D deficiency and mood disorders like depression. That's why some people experience seasonal affective disorder (SAD) during gloomy times.

Vitamin D and Bone Health

Remember how important vitamin D is for maintaining proper calcium levels? Well, it's essential for your bones too! Vitamin D helps your body absorb calcium, promoting strong and healthy bones. It's like the key that unlocks the door to bone health!

The Controversy of Vitamin D

As with many things in the medical world, there are conflicting studies about vitamin D. Some suggest that mega-doses of vitamin D could have a range of health benefits, while others argue about potential risks and toxicity at high levels. Moderation and a balanced approach are key when it comes to supplementing with vitamin D.

Effective Treatments for Vitamin D Deficiency

Are you feeling fatigued, experiencing frequent bone pain, or generally not at your best? These could be signs of vitamin D deficiency, a common condition that affects people worldwide. But fret not! There are several effective treatments to combat this deficiency and get you back on track to optimal health. In this article, we'll explore the best ways to treat vitamin D deficiency, from simple lifestyle changes to prescribed supplements. So, let's dive right in and shed some light on this vital topic!

Sunlight Exposure - The Natural Source

Ah, the golden rays of the sun! Spending some time outdoors can be a simple yet effective way to boost your vitamin D levels. When your skin is exposed to sunlight, it synthesizes vitamin D naturally. Aim for 15 to 30 minutes of sunlight exposure at least twice a week, preferably during midday when the sun's rays are the strongest. But remember, always practice sun safety - wear sunscreen, sunglasses, and protective clothing to avoid sunburn.

Dietary Changes - Vitamin D-Rich Foods

Fortifying your diet with vitamin D-rich foods is another strategy to tackle deficiency. Fatty fish like salmon, mackerel, and tuna are excellent sources of this essential nutrient. Additionally, egg yolks, beef liver, and fortified dairy products like milk and yogurt can contribute to your daily vitamin D intake. For those following a plant-based diet, fortified plant milk and some breakfast cereals are viable options.

Vitamin D Supplements - The Backup Plan

When sunlight and diet alone aren't sufficient, vitamin D supplements come to the rescue! These supplements are available in various forms, including vitamin D2 (ergocalciferol) and vitamin D3 (cholecalciferol). Vitamin D3 is generally preferred as it's more potent and easier for the body to utilize. The appropriate dosage will depend on your specific needs, so it's essential to consult with your healthcare provider before starting any supplementation.

UV Lamps - Artificial Sunlight

For individuals with limited sun exposure due to climate or lifestyle, UV lamps can be a viable alternative to natural sunlight. These lamps emit ultraviolet rays similar to those in sunlight, stimulating the production of vitamin D in the skin. However, UV lamps should be used with caution and under the guidance of a healthcare professional to avoid potential skin damage or overexposure.

Calcium Supplements - Enhancing Absorption

Vitamin D and calcium go hand in hand when it comes to bone health. To maximize the benefits of vitamin D in supporting your bones, consider pairing it with calcium supplements. Calcium helps strengthen bones and works in synergy with vitamin D to ensure proper absorption and utilization.

Lifestyle Changes - Get Active!

Engaging in regular physical activity can also aid in combating vitamin D deficiency. Exercise, especially weight-bearing activities like walking, jogging, or dancing, can improve bone density and overall health. Combining physical activity with sunlight exposure can have a double positive impact on your vitamin D levels.

Monitoring and Follow-Up

Once you start implementing treatments, it's crucial to monitor your progress regularly. Your healthcare provider will likely perform blood tests to check your serum 25(OH)D levels. Based on the results, adjustments to your treatment plan may be made to ensure you reach and maintain optimal vitamin D levels.

Addressing Underlying Conditions

In some cases, vitamin D deficiency may be secondary to other medical conditions or factors. For instance, certain gastrointestinal disorders can affect the absorption of vitamin D from the diet. If an underlying condition is contributing to your deficiency, treating that condition may help improve your vitamin D levels.

Sun Safety and Vitamin D Balance

While sunlight is an excellent source of vitamin D, it's essential to strike a balance between sun exposure and sun protection. Prolonged exposure without protection can increase the risk of skin cancer and other skin issues. Finding the right balance will ensure you get the benefits of vitamin D without compromising your skin health.

Consult a Healthcare Professional

Always remember, when it comes to your health, consulting a healthcare professional is essential. They can assess your individual needs, perform necessary tests, and provide personalized recommendations for treating vitamin D deficiency. Self-diagnosis and self-medication are not advised and can lead to unintended consequences.


So, there you have it! Vitamin D deficiency is a widespread issue that often goes unnoticed. From supporting your bone health to strengthening your immune system, this vital nutrient plays a significant role in keeping you healthy and happy. Remember to get some sun, eat foods rich in vitamin D, and consider supplements if necessary. Take care of your body, and it will take care of you!


  1. Can I get enough vitamin D from sunlight alone?

    • While sunlight is a great natural source of vitamin D, various factors can affect how much you produce, such as skin type, time of day, and geographical location. It's essential to strike a balance between sun exposure and taking supplements or getting vitamin D from your diet.
  2. Are there any side effects of taking vitamin D supplements?

    • When taken within recommended levels, vitamin D supplements are generally safe for most people. However, excessive doses can lead to toxicity, causing symptoms like nausea, vomiting, and weakness. Always follow your healthcare provider's advice regarding supplementation.
  3. Can vitamin D deficiency cause hair loss?

    • Hair loss can have various causes, and vitamin D deficiency may be one of them. Ensuring you have sufficient vitamin D levels might help improve hair health, but it's essential to consult a healthcare professional to determine the underlying cause of hair loss.
  4. Is it possible to get too much vitamin D from sunlight?

    • Your body has a natural mechanism that limits the production of vitamin D from sunlight, preventing excessive levels. However, it's still crucial to practice sun safety, as prolonged sun exposure without protection can increase the risk of skin cancer and other skin issues.
  5. Can I get vitamin D from plant-based sources?

    • Unfortunately, vitamin D is mostly found in animal-based products, like fatty fish, egg yolks, and fortified dairy. While some plant-based foods are fortified with vitamin D, they might not provide enough to meet daily requirements. Vegans and vegetarians may need to rely more on sunlight and supplements to get enough vitamin D.