Research shows that arthritis disease activity, not vitamin D levels alone, is associated with heart function problems in patients with spondyloarthritis. A 2026 study of 298 arthritis patients found that higher arthritis activity correlated with impaired heart relaxation, independent of vitamin D status, though vitamin D did show some benefit for heart function after adjusting for other factors.
Researchers studied 298 people with spondyloarthritis, a type of inflammatory arthritis that affects the spine, to understand how vitamin D relates to heart health. According to Gram Research analysis, while vitamin D levels were similar between arthritis patients and healthy people, the study found that arthritis disease activity was connected to changes in how the heart pumps blood. Interestingly, vitamin D supplementation was more common in arthritis patients, but vitamin D levels themselves weren’t directly linked to arthritis severity. The findings suggest that arthritis inflammation may affect heart function independently of vitamin D status.
Key Statistics
A 2026 study of 298 spondyloarthritis patients published in the Journal of Clinical Medicine found that arthritis disease activity was positively correlated with isovolumic relaxation time, a marker of impaired heart function, independent of vitamin D levels.
Among 298 arthritis patients studied in 2026, vitamin D supplementation was more frequent in the spondyloarthritis group compared to healthy controls, yet vitamin D levels were similar between groups, suggesting supplementation successfully normalized vitamin D in arthritis patients.
In a 2026 analysis of 298 spondyloarthritis patients, the Disease Activity Index for Psoriatic Arthritis (DAPSA) showed an inverse correlation with peak early diastolic mitral annular velocity (e’), indicating that higher arthritis activity was associated with reduced heart relaxation capacity.
The Quick Take
- What they studied: Whether vitamin D levels affect both arthritis disease activity and heart function in people with spondyloarthritis, a chronic inflammatory condition affecting the spine and joints.
- Who participated: 298 patients diagnosed with spondyloarthritis and 57 healthy people without the condition. Researchers measured their vitamin D levels, arthritis activity, and heart function using ultrasound imaging.
- Key finding: Arthritis disease activity was connected to changes in heart function, but vitamin D levels alone were not. However, vitamin D did show a positive association with one measure of heart relaxation after accounting for other factors.
- What it means for you: If you have spondyloarthritis, managing your arthritis inflammation may be important for heart health. While vitamin D supplementation is common in this population, simply taking vitamin D supplements may not directly improve arthritis symptoms or heart function. Talk to your doctor about comprehensive arthritis management.
The Research Details
This was an observational study where researchers collected information from 298 arthritis patients and 57 healthy controls at a single point in time. They measured vitamin D levels in the blood, assessed how active each person’s arthritis was using standard scoring systems, and used echocardiography (heart ultrasound) to measure how well the heart was pumping and relaxing. The researchers then used statistical analysis to look for connections between vitamin D levels, arthritis activity, and heart function measurements.
The study examined two different types of spondyloarthritis: ankylosing spondylitis and psoriatic arthritis. Each type has its own disease activity scoring system. The researchers used these scores to see if arthritis severity correlated with vitamin D levels or heart function problems.
This approach allowed researchers to identify associations between variables, but it’s important to note that finding a connection doesn’t prove that one thing causes another. The study was designed to explore relationships rather than test whether changing vitamin D would improve heart function.
Understanding connections between vitamin D, arthritis activity, and heart health is important because people with spondyloarthritis have higher rates of heart disease. If vitamin D plays a protective role, supplementation could be a simple intervention. However, this study suggests the relationship is more complex than previously thought, and that arthritis inflammation itself may be the key factor affecting heart function.
The study included a reasonable sample size of 298 arthritis patients plus controls, which provides decent statistical power. The researchers used objective measurements like echocardiography rather than relying only on patient reports. They also adjusted their analysis for multiple factors that could influence results, including age, sex, and medications. However, because this is an observational study rather than a controlled experiment, we cannot determine cause and effect. Additionally, the study was conducted at a single time point, so we don’t know if these relationships hold over time.
What the Results Show
Contrary to expectations, vitamin D levels were actually similar between arthritis patients and healthy controls, even though arthritis patients took vitamin D supplements more often. This suggests that supplementation was bringing levels up to normal in the arthritis group. When researchers looked at whether vitamin D correlated with arthritis disease activity, they found no direct connection.
The most important finding involved heart function. Measures of arthritis disease activity (ASDAS and DAPSA scores) were associated with changes in how the heart relaxes between beats. Specifically, higher arthritis activity was linked to slower heart relaxation, which is a sign of heart dysfunction. This relationship remained even after accounting for vitamin D levels, age, sex, and other factors.
Interestingly, vitamin D did show a positive association with one specific heart measurement called the e’ wave (peak early diastolic mitral annular velocity) after adjusting for confounding factors. This suggests vitamin D may have some benefit for heart relaxation, but the connection was independent of arthritis activity.
The study found that patients with insufficient vitamin D levels showed impaired heart function compared to those with adequate vitamin D. This secondary finding suggests vitamin D may play a role in heart health, even if it doesn’t directly affect arthritis severity. The researchers noted that vitamin D supplementation was significantly more common in the arthritis group, indicating that doctors frequently recommend it for these patients despite the lack of direct benefit for arthritis control.
Previous research has suggested that vitamin D deficiency might worsen arthritis inflammation and increase heart disease risk. This study complicates that picture by showing that vitamin D levels don’t directly correlate with arthritis activity. However, the finding that arthritis activity itself is linked to heart problems aligns with existing research showing that inflammatory arthritis increases cardiovascular risk. The study suggests that inflammation from arthritis, rather than vitamin D deficiency alone, may be the primary driver of heart problems in these patients.
This study has several important limitations. First, it’s observational, meaning researchers only measured associations and cannot prove that one factor causes another. Second, the study captured information at only one point in time, so we don’t know if these relationships persist over months or years. Third, the study doesn’t explain why arthritis activity affects heart function or whether treating arthritis more aggressively would improve heart outcomes. Finally, the study was conducted at a single medical center, so results may not apply to all populations with spondyloarthritis.
The Bottom Line
If you have spondyloarthritis, focus on controlling your arthritis inflammation through prescribed treatments, as this appears more important for heart health than vitamin D supplementation alone. Maintain adequate vitamin D levels through diet, sunlight exposure, or supplementation as recommended by your doctor, but don’t expect vitamin D alone to improve arthritis symptoms. Have your heart function monitored regularly, especially if your arthritis is active. Discuss comprehensive cardiovascular risk management with your healthcare team.
This research is most relevant to people with spondyloarthritis, particularly those with ankylosing spondylitis or psoriatic arthritis. Rheumatologists and cardiologists treating these patients should consider these findings when managing disease activity and cardiovascular risk. People without spondyloarthritis should not assume these findings apply to them, as the relationships may be specific to this inflammatory condition.
Changes in heart function related to arthritis activity likely develop over months to years as inflammation persists. You shouldn’t expect immediate improvements in heart function from vitamin D supplementation alone. However, better control of arthritis inflammation through appropriate medical treatment may help prevent progressive heart problems over time. Regular monitoring with echocardiography may be warranted for arthritis patients with active disease.
Frequently Asked Questions
Does vitamin D help with spondyloarthritis symptoms?
A 2026 study of 298 arthritis patients found no direct association between vitamin D levels and arthritis disease activity, suggesting vitamin D supplementation alone may not improve arthritis symptoms. However, maintaining adequate vitamin D remains important for overall health.
Can vitamin D deficiency cause heart problems in arthritis patients?
Research shows arthritis inflammation itself, rather than vitamin D deficiency, appears to be the primary driver of heart function problems in spondyloarthritis patients. While vitamin D did show some benefit for heart relaxation, controlling arthritis activity seems more important.
Should I take vitamin D supplements if I have spondyloarthritis?
Discuss vitamin D supplementation with your rheumatologist or doctor. While this study found vitamin D doesn’t directly improve arthritis symptoms, maintaining adequate levels supports overall health. Focus primarily on controlling your arthritis inflammation through prescribed treatments.
How does arthritis inflammation affect the heart?
The study found that higher arthritis disease activity correlated with slower heart relaxation between beats, a sign of heart dysfunction. This suggests chronic inflammation from arthritis may damage heart muscle over time, independent of vitamin D status.
Do I need heart monitoring if I have spondyloarthritis?
Given that arthritis activity is linked to heart function problems, regular cardiovascular monitoring may be beneficial, especially if your arthritis is active. Discuss with your doctor whether echocardiography or other heart tests are appropriate for you.
Want to Apply This Research?
- Track your arthritis disease activity score (ASDAS or DAPSA depending on your diagnosis type), vitamin D supplementation doses, and any heart-related symptoms like shortness of breath or fatigue. Record these weekly to identify patterns between arthritis flares and cardiovascular symptoms.
- Use the app to set reminders for arthritis medications as prescribed, since controlling inflammation appears more important than vitamin D alone. Log your vitamin D intake if supplementing, but focus primarily on adherence to your rheumatologist’s treatment plan for arthritis control.
- Create a long-term dashboard showing trends in arthritis activity over months alongside any cardiovascular symptoms or test results. This helps you and your doctor identify whether better arthritis control correlates with improved heart health markers over time.
This research describes associations between vitamin D, arthritis activity, and heart function in patients with spondyloarthritis. These findings should not be interpreted as medical advice. Do not start, stop, or change any medications or supplements without consulting your healthcare provider. If you have spondyloarthritis or concerns about your heart health, work with your rheumatologist and cardiologist to develop an appropriate treatment plan. This study cannot establish cause and effect, only correlations, so individual results may vary.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.