TL;DR
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A randomized trial of 61 healthy adults found that participants assigned a daily multi-ingredient supplement had improved measures of endothelial function and arterial stiffness after six months, along with a reduction in systolic blood pressure. Only 43 participants completed both visits, and the study did not test whether the supplement prevents heart attacks, strokes or other cardiovascular events.
A six-month randomized trial found that healthy adults assigned a daily multi-ingredient supplement had improvements in measures of blood vessel function and stiffness, as well as lower systolic blood pressure, compared with a control group. The University of Surrey study, published in European Heart Journal Open, was small and did not measure whether the changes reduced heart attacks, strokes or other cardiovascular events.
The trial enrolled 61 healthy adults, assigning participants to either a nutritional powder containing vitamins, minerals, amino acids and plant-derived compounds or a similar-looking powder without active ingredients. Both groups took their assigned product daily for six months. The primary analysis included 43 people who completed both study visits. Researchers also assessed vascular measures one hour after participants took their first dose.
After six months, endothelial function—a measure of how well the inner lining of blood vessels works—improved significantly in the supplement group, while it remained largely unchanged in the control group. Arterial stiffness decreased in the intervention group and increased in the control group. Systolic blood pressure, the pressure recorded as the heart contracts, also fell significantly in the supplement group; the change was much smaller in the control group. Endothelial function improved significantly one hour after the first dose as well.
The results were not uniform across all measures. The researchers found no significant between-group difference in diastolic blood pressure, and cholesterol measures, including LDL and HDL, remained comparable. The estimated 10-year risk of a first atherosclerotic cardiovascular disease event shifted slightly in opposite directions between groups, but the study did not track actual events. The report said the risk estimate difference was driven mainly by the change in systolic pressure.
What the Vascular Measures Show
Blood vessel function, arterial stiffness and blood pressure are relevant indicators of cardiovascular health, so changes in these measures may help researchers assess approaches to vascular aging. The study’s findings offer preliminary human evidence that a combination of nutrients and plant-derived compounds may affect several such measures at once. That is of interest because earlier research has often examined compounds individually, while the effects of combining them have been less well established.
However, changes in markers are not the same as proof that a supplement prevents disease. The trial was small, lasted six months and enrolled healthy adults. It did not establish whether the observed differences persist, apply to people with existing cardiovascular conditions, or translate into fewer heart attacks or strokes. The findings should be read as an early signal for further testing, not as evidence that people should replace prescribed care or established risk-reduction measures with a supplement.
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Why Researchers Tested a Combination
Vascular aging refers to gradual changes in blood vessels, including reduced endothelial function, greater arterial stiffness and rising blood pressure. The study report describes several biological processes that may contribute, such as oxidative stress, low-grade inflammation, mitochondrial dysfunction and changes in nitric oxide availability. These processes can overlap, which has led researchers to examine whether multiple compounds aimed at different pathways might have combined effects.
The University of Surrey researchers designed the trial to address the limited clinical evidence on multi-compound nutritional interventions in people. Participants were assessed at the start and after six months for endothelial function, arterial stiffness, blood pressure, blood lipids and estimated 10-year cardiovascular risk. Because the trial compared an active powder with a similar-looking control product, it provides a controlled test of the particular formulation, but it does not establish that any individual ingredient was responsible for the results.
Questions the Trial Cannot Answer
The report does not establish which ingredients contributed to the observed changes, whether ingredients acted together, or whether the results would be similar with other products or doses. It also does not provide evidence that the supplement reduces the incidence of cardiovascular disease. The primary analysis included 43 of the 61 participants enrolled, and the supplied report does not explain in detail why the others were not included in that analysis.
Further questions include whether benefits persist beyond six months, whether they occur in older adults or people with diagnosed conditions, and how safe long-term use would be across different groups. The study results alone do not support medical advice to begin supplementation. Anyone considering a supplement, particularly while taking medication or managing a health condition, should discuss it with a qualified health professional.
Larger Trials Must Test Outcomes
The researchers said the findings require confirmation in larger and longer clinical trials. Future studies could test whether the changes are reproducible, clarify the contribution of individual ingredients, and assess safety over longer periods. They would also need to recruit participants across a wider range of ages and cardiovascular risk profiles to determine how broadly the results apply.
A further step would be to determine whether changes in vascular markers lead to fewer clinical events, rather than relying on estimated risk scores. No such outcome data are reported for this trial. Until additional evidence is available, the supplement’s effect on long-term cardiovascular health remains unknown.
Key Questions
What did the trial find?
After six months, the supplement group showed improved endothelial function, reduced arterial stiffness and a significant decrease in systolic blood pressure. The study did not find a significant between-group difference in diastolic pressure or blood lipid measures.
How many people took part?
The study enrolled 61 healthy adults. The primary analysis included the 43 participants who completed both study visits.
Did the supplement prevent heart attacks or strokes?
The trial did not assess actual cardiovascular events. It reported changes in vascular measures and an estimated 10-year risk score, which is not proof that the supplement prevents heart attacks or strokes.
Is the supplement proven to work for everyone?
No. This was a small, six-month study in healthy adults, and its findings need confirmation in larger, longer trials. The results do not show whether the same effects occur in people with cardiovascular disease or other health conditions.
Should I start taking a supplement based on this study?
The study does not establish that people should start supplementation or change prescribed treatment. For personal medical decisions, consult a qualified health professional, especially if you take medication or have a health condition.
Source: news-medical.net
