Medically reviewed on August 1, 2022 by Jillian Foglesong Stabile, MD, FAAFP. To give you technically accurate, evidence-based information, content published on the Everlywell blog is reviewed by credentialed professionals with expertise in medical and bioscience fields.
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We’re all looking for ways to stay healthy, and keeping up with daily vitamin requirements is an integral part of overall wellness. Vitamin D, in particular, is essential for several biological functions, including maintaining bone health. But do you know your vitamin D status?
If you’re asking, “Can low vitamin D cause bone fractures?” the answer is yes.
In fact, vitamin D deficiency can lead to a whole host of health issues, including weakened bones, bone loss, bone disease like osteoporosis, and bone injuries beyond small bone fractures and fissures. Follow along to discover the connection between vitamin D and bone health and learn the best way to support your skeleton for the long and short term.
How does vitamin D impact your bone health?
Vitamins can affect multiple bodily systems, working synergistically with cells, proteins, and hormones to perform complex and crucial biological functions.
As one of the 13 essential vitamins that make up a healthy diet, your body uses vitamin D in the following ways:
- Immune response – Your body needs vitamin D to fight off various viruses and bacteria. As a pillar of immune system support, vitamin D can help ensure your body is prepared to protect you from illnesses.
- Nerves and muscles – Your nerves are the messengers of your body. Vitamin D ensures your nervous system continues functioning properly and sends signals between your body and your brain. Additionally, vitamin D also helps maintain your muscles. If it weren’t for vitamin D, you might be unable to move.
- Bone health – One of vitamin D’s primary functions is to help your body absorb calcium, a major building block for your bones—both for developing children and aging adults. Not only does it help strengthen and maintain your skeletal system, but it also provides the necessary nutrients to keep your bones strong and resilient.
Calcium is the mineral most associated with bone and tooth health. In fact, 99% of your body’s calcium is stored in your bones.  Calcium is sourced from the food in your diet, including green leafy vegetables, dairy products, and calcium-enriched foods. Without vitamin D supplementation, all that calcium supplementation would go to waste, as your body would be unable to synthesize it.
What causes vitamin D deficiency?
A vitamin D insufficiency simply refers to the condition of not having enough of this essential vitamin in your body. A deficiency doesn’t always start right away. In fact, as a fat-soluble vitamin, it could be days—or even weeks— before your body’s surplus of vitamin D is used up.
That said, once gone, the symptoms of vitamin D deficiency (including weakened bones and bone mineral density loss) may occur rather quickly. The length and severity of a vitamin D deficiency will depend on how long it’s left untreated. Conditions will likely worsen if your body doesn’t receive the vitamin D it needs.
Several factors could contribute to a vitamin D deficiency, including:
- Absorption diseases – Often, deficiencies spring up when absorption is interrupted. Conditions like celiac disease and Crohn’s disease can directly interfere with the natural absorption that occurs during digestion. Even if you’re supplying your body with adequate vitamin D, a disconnect between consumption and absorption could result in a serious deficiency. (Related: At-Home Celiac Test)
- Lack of sun – In some cases, vitamin D deficiency is caused by a lack of sun. If you find yourself frequently indoors or living in a climate with little to no sunshine, it’s not at all uncommon to develop a vitamin D deficiency.
- Insufficient diet – Not eating enough greens? Our diets are the primary source of most vitamins. While you can always rely on the sun for a dose of vitamin D, a varied and healthy diet can benefit your bones, body, and overall wellness.
What are the side effects of vitamin D deficiency?
A lack of vitamins and minerals is bad news for health and wellness in general. From strange bruising to bothersome rashes, the symptoms of a deficiency can sometimes be hard to pinpoint without the help of a medical professional.
Vitamin D deficiency, in particular, can lead to fatigue, kidney problems, digestive issues, and several other health issues. Additionally, your largest concern is likely the dangerous, long-term bone damage you could sustain from a lack of vitamin D. Consider the following conditions associated with this deficiency.
Bone mineralization refers to the process of adding mineral density (calcium) within bone tissue.  When mineralization doesn’t occur correctly, it can result in health issues, including:
- Rickets – A dangerous disease that often affects developing children, rickets is caused by a vitamin D, calcium, or phosphate deficiency.  Without adequate vitamins or minerals, bones can become soft and weak, causing them to form incorrectly.
- Osteomalacia – Similar to rickets but found exclusively in adults, osteomalacia results in a breakdown of bone density.  Symptoms typically include pain in the legs and hips, frequent fractures, and mobility issues.
There are more than 200 hundred bones in the human body, and all of them need calcium to thrive. Without vitamin D, your body can’t absorb enough calcium to maintain bone density. This can lead to issues like: 
- Fractures, breaks, and cracks – It’s no surprise that brittle bones are more prone to breakage. Typically, fractures occur when bones are put under extreme stress—such as a car accident or a fall—but a prolonged vitamin D deficiency could leave your bones so weakened that even a minor accident could lead to a painful break. You are at a high fracture risk if you have a low vitamin D level.
- Slow fracture healing – Recovery times vary depending on the severity and location of a break. Still, a vitamin D deficiency could slow down the healing process or interfere with proper bone regrowth. This may lead to further complications, including reduced mobility and extended discomfort.
- Muscle weakness – Vitamin D also contributes to muscle function, and deficiency can lead to weakened muscles and physical fatigue. This, in turn, could make you more susceptible to falls, increasing the likelihood of bone fractures.
Bone fractures and related physical trauma are extremely dangerous for older individuals. If you’re over 70, you know the risks of breaking bones. Seniors are often recommended higher doses of vitamin D, to reduce their fracture risk and related issues.
Osteoporosis is strongly correlated with vitamin D and calcium deficiencies, a disease that directly affects bone health and density. This condition leads to frequent breaks and fractures, often leading to mobility problems and long-term health crises. 
If you’re concerned about osteoporosis, consider the following:
- Consider your risk factors – Your age, family history, and current medications are all potential risk factors for developing osteoporosis. Risk factors don’t mean you’re certain to develop osteoporosis—even those in high-risk groups can avoid this condition.
If your healthcare provider has questions or concerns about your potential risk, be sure to supply accurate and thorough information.
- Seek medical testing – Osteoporosis is considered a “silent disease.” While some risk factors are known, there are no telltale signs of the disease. That is, until you begin fracturing bones. Medical testing could provide an accurate image of your current bone density, providing insight into your likelihood of developing this disease.
- Develop healthy habits – You can make positive lifestyle changes to help reduce your risk of osteoporosis. The best steps you can take include eliminating smoking, eating a balanced diet, and prioritizing your calcium and vitamin D intake every day.
How to source your vitamin D
You know the importance of vitamin D, but do you know where to look for it? You can get your vitamin D through any of the following sources:
- Sunlight – Your skin can convert the sun’s rays into vitamin D. This natural process makes getting vitamin D fairly straightforward for anyone living in a sunny climate. It takes less than 30 minutes of sun to get all the vitamin D you need for the day.
- Diet – Leafy green vegetables and dairy are two excellent sources of vitamin D. Additionally, you can look to vitamin-enriched bread, cereals, and grains to fill out your daily recommended amounts.
- Supplements – Today, it’s easier to source high-quality vitamin supplements designed to supply you with the proper amount of vitamin D. Some supplements may even offer co-active ingredients that could afford additional health benefits.
Whether you’re spending time under the sun or opting for a supplement with your morning meal, getting your daily dose of vitamin D doesn’t have to be difficult. In fact, it’s one of the easiest ways to avoid preventable bone injuries and other related health issues.
Maintain your vitamin D levels with Everlywell
Vitamin D is a key component of skeletal health. With a little knowledge about how this essential vitamin functions, you’re more prepared to avoid painful fractures, bone loss, bone disease, and other bone issues. Another strategy is to keep tabs on your vitamin D levels with Everlywell. Curious about how to determine your vitamin D status?
Make health simpler, smarter, and more effective by exploring our lab-certified home health tests. From our Vitamin D Test to our Celiac Disease Screening Test, you can enjoy accurate, physician-reviewed data delivered safely and securely. Plus, we offer a range of nutritional supplements (including vitamin D supplements) to help ensure you feel your best.
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- Calcium. MedlinePlus. URL. Accessed August 1, 2022.
- What Is Bone Mineralization? The Journal of Clinical Endocrinology & Metabolism. URL. Accessed August 1, 2022.
- Rickets. MedlinePlus. URL. Accessed August 1, 2022.
- Osteomalacia. Cleveland Clinic. URL. Accessed August 1, 2022.
- The role of vitamin D for bone health and fracture prevention. NIH. URL. Accessed August 1, 2022.
- Osteoporosis. MedlinePlus. URL. Accessed August 1, 2022.
- Prevalence of Vitamin D Deficiency and Associated Risk Factors in the US Population. NIH. URL. Accessed August 1, 2022.
- Vitamin D Deficiency. MedlinePlus. URL. Accessed August 1, 2022.
- The effect of vitamin D on bone and osteoporosis. NIH. URL. Accessed August 1, 2022.