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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, alongside a reduction in systolic blood pressure. Only 43 participants completed both visits, and the study did not measure cardiovascular events, so it cannot show whether the changes prevent heart attacks or strokes.
A six-month randomized trial in 61 healthy adults found that a daily powder containing vitamins, minerals, amino acids and plant-derived compounds was associated with improvements in endothelial function, arterial stiffness and systolic blood pressure. The findings, published in European Heart Journal Open, are preliminary: 43 participants completed both study visits, and researchers did not test whether the changes reduced heart attacks, strokes or other cardiovascular events.
According to the study report in European Heart Journal Open, researchers at the University of Surrey randomly assigned participants to take either the multi-ingredient supplement or a similar-looking powder without active ingredients for six months. The supplement was designed to combine compounds that may act on different processes linked to vascular aging. Researchers assessed blood-vessel function, arterial stiffness, blood pressure, blood lipids and estimated cardiovascular risk at the start and end of the study. They also measured vascular responses one hour after the first dose.
The researchers reported that endothelial function improved in the supplement group after six months, while it was largely unchanged in the control group. Endothelial function also improved one hour after the first dose. The study report describes a significant reduction in arterial stiffness in the supplement group, compared with an increase in the control group. Systolic blood pressure fell significantly in the supplement group; the decrease was smaller in the control group. The report found no significant between-group difference in diastolic pressure after the intervention.
The study found that blood lipid measures, including total cholesterol, LDL and HDL cholesterol, and triglycerides, remained comparable between groups. The estimated 10-year risk of a first atherosclerotic cardiovascular disease event fell slightly in the supplement group and rose in the control group. The researchers said this difference was mainly driven by the systolic blood pressure change; the risk estimate was not a count of actual events.
What the Vessel Measures Show
The results add human trial evidence to a question about whether combining several nutrients and plant compounds could influence measurable aspects of vascular health. Blood vessels become stiffer and their inner lining may function less well with age; these changes are associated with cardiovascular risk. The trial’s findings could help guide larger studies of multi-ingredient supplements rather than single compounds.
But improved test measurements are not the same as demonstrated protection from disease. The trial did not assess whether participants had fewer heart attacks, strokes or deaths, and the reported changes do not establish that the supplement prevents cardiovascular disease. It also does not show that taking the product is an alternative to prescribed treatment or other established risk-reduction measures.
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Why Researchers Tested a Combination
Vascular aging involves several interacting processes, including oxidative stress, inflammation, mitochondrial changes and altered availability of nitric oxide, which helps regulate blood-vessel function. Past research has often examined bioactive compounds individually. The Surrey team said evidence for the effects of combining several such ingredients in people remains limited.
The trial used a randomized control design: one group received the active powder and the other a visually similar powder without active ingredients. The study assessed participants before and after six months, providing a comparison between groups. Its relatively small completed sample and limited follow-up mean the results should be treated as an early clinical signal, not a settled conclusion about long-term health.
Limits of the Six-Month Evidence
The available report does not provide the supplement’s full ingredient doses, the size of each change in the vascular measures, or detailed information about adverse effects. It is therefore not possible from these findings alone to judge the clinical importance of the changes, identify which ingredients contributed, or assess the product’s safety for different groups.
Eighteen of the 61 randomized participants did not complete both visits and were not included in the primary analysis. The report does not establish why they left or whether their absence affected the results. The study also did not measure cardiovascular events, and its estimated 10-year risk calculation is not proof that risk changed over a decade. Whether effects persist after supplementation stops is also unknown.
Larger Trials Must Test Outcomes
The findings point to a need for larger and longer clinical trials that report ingredient doses, track participants who discontinue, and assess both safety and changes in vascular measures. Studies would also need to determine whether any measured benefit lasts and whether it translates into fewer cardiovascular events over time.
Until such evidence is available, the results support further research rather than a general recommendation to take the supplement. People considering a supplement, particularly those with health conditions or taking medication, can discuss it with a qualified health professional.
Key Questions
What did the trial find?
Among participants who completed the study, the supplement group showed improved endothelial function, reduced arterial stiffness and lower systolic blood pressure after six months. The study did not show that these changes prevented cardiovascular events.
How many people took part?
Sixty-one healthy adults were randomized to the supplement or control group. Forty-three completed both study visits and were included in the primary analysis.
Did the supplement lower cholesterol?
No significant difference in blood lipid measures, including total cholesterol, LDL, HDL and triglycerides, was reported between the groups after six months.
Does this mean the supplement prevents heart disease?
No. The researchers measured vascular indicators and estimated risk, but did not track actual heart attacks, strokes or other cardiovascular events. Larger, longer studies are needed to test those outcomes.
Is the supplement suitable for everyone?
The trial does not establish suitability for everyone. People considering supplements, especially those with medical conditions or taking medication, should consult a qualified health professional.
Source: news-medical.net
