According to research reviewed by Gram, vitamin B1 deficiency may cause pulmonary arterial hypertension by disrupting cellular energy production and damaging lung blood vessels. Small studies suggest vitamin B1 supplements could help patients with this condition, though large-scale research is needed to confirm effectiveness and prevalence.

Researchers found that not getting enough vitamin B1 (thiamine) might cause a serious condition called pulmonary arterial hypertension, where blood pressure in the lungs becomes dangerously high. When people don’t have enough vitamin B1, their body’s energy-making process gets disrupted, which can damage blood vessels in the lungs. This vitamin deficiency can cause severe heart problems and even death if not treated quickly. While more research is needed, early studies suggest that taking vitamin B1 supplements might help people with this lung condition feel better.

Key Statistics

A comprehensive review of existing research found that vitamin B1 deficiency disrupts the citric acid cycle, potentially causing dangerous high blood pressure in lung blood vessels and severe complications including Shoshin beriberi with heart failure.

Small studies and individual patient reports indicate that vitamin B1 supplementation may improve symptoms in people with pulmonary arterial hypertension, though improvements have only been documented in a limited number of cases.

The connection between vitamin B1 deficiency and lung blood pressure problems remains largely overlooked in medical practice, with most doctors not routinely screening for this deficiency when treating pulmonary circulation disorders.

The Quick Take

  • What they studied: How vitamin B1 deficiency might cause high blood pressure in the lungs
  • Who participated: This was a review of existing research rather than a new study with participants
  • Key finding: Vitamin B1 deficiency may contribute to dangerous lung blood pressure problems by disrupting how cells make energy
  • What it means for you: If you have lung blood pressure problems, your doctor might want to check your vitamin B1 levels and consider supplements

The Research Details

This was a comprehensive review that looked at existing research about vitamin B1 deficiency and lung blood pressure problems. The researchers examined how vitamin B1 works in the body, what happens when people don’t get enough of it, and how this might affect the lungs and heart. They also looked at case reports and small studies where doctors gave vitamin B1 supplements to patients with lung problems.

Review studies are important because they bring together information from many different sources to see the bigger picture. This helps doctors understand connections that might not be obvious from just one study.

While this review provides valuable insights, the authors note that large, high-quality studies are still needed. Most evidence comes from small studies and individual patient cases, which means we need more research to be completely sure about the connection.

What the Results Show

The review found that vitamin B1 deficiency can disrupt the body’s main energy-making process, called the citric acid cycle. When this process doesn’t work properly, it can damage blood vessels in the lungs and cause dangerous high blood pressure. The deficiency can show up in different ways, including a severe form called Shoshin beriberi that causes heart failure and dangerous acid buildup in the blood. This severe form can be deadly if not treated quickly with vitamin B1.

Small studies and individual patient reports suggest that giving vitamin B1 supplements to people with lung blood pressure problems might help them improve. However, these improvements have only been seen in a small number of cases.

This connection between vitamin B1 deficiency and lung blood pressure problems has been largely overlooked in medical practice. Most doctors don’t routinely check for vitamin B1 deficiency when treating patients with lung circulation problems.

The biggest limitation is that there haven’t been any large, well-designed studies to prove this connection definitively. Most evidence comes from individual patient cases and very small studies, so we can’t be completely certain about how common this problem is or how well vitamin B1 treatment works.

The Bottom Line

People with lung blood pressure problems may benefit from having their vitamin B1 levels checked and possibly taking supplements, but this should only be done under medical supervision. More research is needed before this becomes standard treatment.

This information is most relevant for people already diagnosed with pulmonary arterial hypertension and their doctors. People with heart failure or unexplained fatigue might also want to discuss vitamin B1 testing with their healthcare provider.

If vitamin B1 deficiency is present, improvements might be seen within weeks to months of starting supplements, but individual results will vary and depend on the severity of the deficiency.

Frequently Asked Questions

Can vitamin B1 deficiency cause high blood pressure in the lungs?

Research suggests vitamin B1 deficiency may contribute to pulmonary arterial hypertension by disrupting the citric acid cycle, which damages lung blood vessels. However, large-scale studies are still needed to confirm this connection definitively.

How quickly do vitamin B1 supplements work for lung blood pressure problems?

According to the research review, improvements from vitamin B1 supplementation might appear within weeks to months of starting treatment, though individual results vary depending on deficiency severity and require medical supervision.

What are the symptoms of severe vitamin B1 deficiency?

Severe vitamin B1 deficiency can cause Shoshin beriberi, characterized by heart failure, dangerous acid buildup in blood, fatigue, shortness of breath, and heart palpitations. This condition can be life-threatening without prompt treatment.

Should I get tested for vitamin B1 deficiency if I have lung problems?

If you have pulmonary arterial hypertension or unexplained heart symptoms, discussing vitamin B1 testing with your healthcare provider is worthwhile. Most doctors don’t routinely check for this deficiency, making patient awareness important.

Want to Apply This Research?

  • Track daily intake of vitamin B1-rich foods like whole grains, pork, fish, and legumes, aiming for the recommended daily amount
  • Log symptoms like fatigue, shortness of breath, and heart palpitations to discuss patterns with your healthcare provider
  • Monitor energy levels, exercise tolerance, and any breathing difficulties over time, especially if you have risk factors for vitamin B1 deficiency

This information is for educational purposes only and should not replace professional medical advice. If you have symptoms of heart or lung problems, consult with a healthcare provider immediately. Do not start vitamin supplements without medical supervision, especially if you have existing health conditions.

This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.

Source: An easily overlooked cause of pulmonary arterial hypertension-thiamine deficiency.Frontiers in nutrition (2025). PubMed 40823031 | DOI