A Gram Research analysis of the STOOD trial protocol shows that researchers are testing whether 5 grams of daily salt supplementation can reduce falls and improve symptoms in older adults with orthostatic hypotension—a condition causing sudden blood pressure drops when standing. This 6-month feasibility study of 48 participants will provide the first rigorous evidence for a medical recommendation that currently lacks strong scientific support, while carefully monitoring for potential heart-related risks from extra salt intake.
A new study is testing whether adding salt to the diet can help older adults with a condition called orthostatic hypotension—a sudden drop in blood pressure when standing up. This condition causes dizziness and falls, which can lead to serious injuries like broken hips. Doctors currently recommend eating more salt to help, but there’s not much solid evidence that it actually works. Researchers are now running a careful test with 48 older adults to see if salt supplements really help reduce falls and improve quality of life, while also checking whether extra salt causes heart problems over time.
Key Statistics
The STOOD trial, a 2026 randomized controlled trial of 48 older adults, will test whether 5 grams of daily salt supplementation reduces orthostatic hypotension symptoms over 6 months—significantly longer than previous studies that lasted less than 8 weeks.
Current medical guidelines recommend increasing salt intake for orthostatic hypotension, but this recommendation is based primarily on small trials with very short-term follow-up of less than 8 weeks, according to the STOOD trial protocol.
The STOOD feasibility study will evaluate whether salt supplementation improves quality of life and reduces fall risk in older adults while monitoring for potential long-term cardiovascular risks that previous short-term studies could not detect.
The Quick Take
- What they studied: Whether taking extra salt (5 grams per day) helps older adults with orthostatic hypotension—a condition where blood pressure drops suddenly when you stand up—reduce falls and improve daily life.
- Who participated: The study will include 48 adults aged 65 and older who have orthostatic hypotension symptoms. Participants cannot have uncontrolled high blood pressure, heart failure, or certain other serious conditions.
- Key finding: This is a feasibility study, meaning researchers are testing whether they can actually run this experiment properly before doing a larger trial. The main goal is to see if they can recruit and keep 48 participants, and to get early hints about whether salt supplementation helps.
- What it means for you: If you’re an older adult with dizziness when standing, don’t change your salt intake yet based on this study. This research is still in early stages. Talk to your doctor before making dietary changes, especially if you have heart or blood pressure concerns.
The Research Details
The STOOD trial is a randomized controlled trial, which is considered one of the best ways to test if a treatment works. Researchers will randomly assign 48 older adults into two groups: one group will take 5 grams of salt per day in capsule form (in addition to their normal diet), and the other group will continue their usual routine without extra salt. The study will last 6 months, which is longer than most previous salt studies (which only lasted a few weeks).
This is called an ‘open-label’ study, meaning both the participants and researchers know who is getting the salt supplement. The study takes place at a single center, making it easier to manage but also meaning results may not apply everywhere. Researchers will measure how much orthostatic hypotension symptoms improve using a standard questionnaire, and they’ll track whether participants can stick with the program.
Current medical guidelines recommend eating more salt for orthostatic hypotension, but this advice is based on very weak evidence—mostly small studies that only lasted a few weeks. The STOOD trial is important because it will test salt supplementation for a longer period (6 months instead of weeks) and will carefully watch for both benefits and potential harms. This matters because while extra salt might prevent falls in the short term, it could increase heart disease risk over time. A proper study helps doctors give better advice.
This is a well-designed feasibility study published in a peer-reviewed journal. The researchers carefully defined who can and cannot participate, which makes the results more reliable. However, this is a small pilot study with only 48 people at one location, so results won’t be definitive. The study was registered before it started (ClinicalTrials.gov), which is a sign of good scientific practice. The main limitation is that it’s not yet a full-scale trial, so we won’t have final answers about whether salt really helps—just whether a bigger study is possible.
What the Results Show
This is a study protocol paper, meaning the research hasn’t been completed yet—it describes the plan for the study rather than actual results. The researchers are still recruiting participants and haven’t yet collected data on whether salt supplementation helps. The primary goal right now is to test whether they can successfully recruit and keep 48 older adults in the study for 6 months. They will measure success by tracking how many people sign up, how many drop out, and whether participants can tolerate taking salt capsules daily.
Once the study is complete (expected sometime after 2026), researchers will measure the main outcome: changes in orthostatic hypotension symptoms using a standardized questionnaire. They’ll also look at whether participants experience fewer falls, whether their quality of life improves, and whether any heart-related problems develop. The study is designed to provide preliminary evidence about whether salt supplementation works before investing in a much larger, more expensive trial.
Beyond the main question about salt and falls, researchers will also track other important outcomes. They’ll monitor blood pressure changes, measure quality of life improvements, and watch for any cardiovascular side effects. They’ll also assess how well participants stick with taking the salt supplements daily and whether the capsules are tolerable. These secondary outcomes will help researchers understand not just whether salt helps, but also whether it’s practical and safe for older adults to use long-term.
Previous research on salt and orthostatic hypotension is limited and weak. Most studies lasted less than 8 weeks, which isn’t long enough to see real-world benefits or risks. The STOOD trial improves on this by running for 6 months, allowing researchers to see longer-term effects. This study also carefully balances the potential benefits (fewer falls, better quality of life) against potential harms (increased heart disease risk), which previous research didn’t always do. By being more rigorous, this study will provide much better evidence than what currently supports the medical guideline recommending extra salt.
This study has several important limitations. First, it’s small (only 48 people) and takes place at just one medical center, so results may not apply to all older adults everywhere. Second, it’s ‘open-label,’ meaning both participants and doctors know who is getting salt, which could influence results through placebo effects. Third, 6 months is longer than previous studies but still may not be long enough to fully understand cardiovascular risks from extra salt. Fourth, the study only includes people with moderate salt intake at baseline, so results may not apply to people eating very high or very low salt diets. Finally, this is a feasibility study, not a definitive trial, so it won’t provide final answers—just information to plan a bigger study.
The Bottom Line
This study is still in progress, so there are no new recommendations yet. Current medical guidelines suggest increasing salt intake for orthostatic hypotension, but this recommendation is based on weak evidence. Once the STOOD trial is complete, it may provide better guidance. For now, if you have orthostatic hypotension symptoms (dizziness when standing), work with your doctor to find the right salt intake for your individual situation, considering your heart health and blood pressure.
This research is most relevant to older adults (65+) with orthostatic hypotension who experience dizziness or near-fainting when standing. It’s also important for doctors treating this condition. People with uncontrolled high blood pressure, heart failure, or certain other conditions should not increase salt intake without medical supervision. The findings will eventually help guide treatment for millions of older adults at risk of falls.
This study is currently recruiting participants and won’t have results for at least 1-2 years. Even after results are published, it will take time for doctors to review the findings and update treatment guidelines. If you’re waiting for this research to guide your care, talk to your doctor now about the best approach for your individual situation rather than waiting for these results.
Frequently Asked Questions
Should I eat more salt if I get dizzy when I stand up?
Current medical guidelines suggest increasing salt for orthostatic hypotension, but evidence is weak. The STOOD trial will provide better evidence by 2027-2028. Talk to your doctor about your individual situation before changing salt intake, especially if you have heart or blood pressure concerns.
How much salt should older adults with orthostatic hypotension take?
The STOOD trial is testing 5 grams (about 1 teaspoon) of salt daily. However, the right amount varies by person. Your doctor can recommend the best dose based on your blood pressure, heart health, and symptoms. Don’t self-treat without medical guidance.
Can extra salt cause heart problems in older adults?
High salt intake is linked to increased cardiovascular disease risk over time. The STOOD trial specifically monitors for heart problems during its 6-month study to balance short-term fall prevention against long-term heart risks. This is why medical supervision is important.
What is orthostatic hypotension and why does it cause falls?
Orthostatic hypotension is a sudden drop in blood pressure when you stand up, causing dizziness, lightheadedness, or fainting. These symptoms increase fall risk, which can lead to serious injuries like hip fractures in older adults. Salt may help by improving blood volume and blood pressure stability.
When will the STOOD trial results be available?
The STOOD trial is currently recruiting participants and won’t have final results for approximately 1-2 years. The study was registered in December 2023 and is expected to provide preliminary findings in 2026-2027, with full results following peer review.
Want to Apply This Research?
- Track daily salt intake (in grams) and orthostatic symptoms (dizziness, lightheadedness, near-fainting episodes) on a 1-10 scale each time you stand up quickly. Note any falls or near-falls, and record blood pressure readings if you have a home monitor.
- If your doctor recommends a salt trial, use the app to log when you take salt supplements and monitor your symptoms daily. Set reminders for consistent timing and dosage. Track how you feel before and after making dietary changes to share objective data with your healthcare provider.
- Create a weekly summary view showing average symptom scores, fall incidents, and salt intake consistency. Compare week-to-week trends over 4-6 weeks to see if symptoms improve. Share monthly reports with your doctor to adjust the salt recommendation based on your personal response.
This article describes a research study protocol that is still in progress and has not yet produced final results. The findings discussed are preliminary and based on the study design, not actual outcomes. This information is for educational purposes only and should not replace professional medical advice. If you have orthostatic hypotension or experience dizziness when standing, consult your healthcare provider before making any dietary changes, especially regarding salt intake. Do not increase salt consumption without medical supervision, particularly if you have high blood pressure, heart disease, or kidney problems. Individual responses to salt supplementation vary significantly, and what works for one person may not work for another or could cause harm.
This research translation is published by Gram Research, the science division of Gram, an AI-powered nutrition tracking app.