Blood Metabolite Profile Linked to Lower Mortality Risk
A new study identifies 67 blood plasma metabolites that correlate with adherence to a Mediterranean diet.
Updated on Oct. 21, 2026 in Nutrition
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Researchers have identified a 67-metabolite blood profile that reflects adherence to a Mediterranean diet and a 23% lower relative risk of mortality. The findings were validated across international cohorts in Spain and the United States.
Why it matters
The study suggests that biological markers of dietary habits can serve as indicators for long-term health outcomes. These insights help clarify the physiological link between dietary choices and the risk of death from chronic causes.
The study analyzed 67 metabolites in 1,880 PREDIMED participants and 12,704 individuals across U.S. cohorts. Researchers observed a 23% relative risk reduction in mortality among those with the highest diet-adherence profile scores.
The players
PREDIMED
This is a large-scale, long-term nutritional intervention trial based in Spain that studies the health effects of the Mediterranean diet.
The details
By evaluating blood plasma levels, scientists created a score to assess how closely participants followed a diet rich in olive oil, vegetables, fruit, legumes, nuts, and fish. Higher scores in this profile were linked to reduced cardiovascular mortality, though no significant link to cancer-related deaths was found.
Timeline
13.2 years was the average follow-up period for PREDIMED study participants.
25 years was the average follow-up period for U.S. study participants.
The Big Picture
This research follows the patterns set by the PREDIMED study, shifting the focus from self-reported dietary questionnaires to objective biological metrics. It represents a transition toward using blood plasma profiles to measure the real-world impact of long-term nutritional habits.
This discovery highlights the importance of incorporating heart-healthy fats and produce into daily routines to maintain a beneficial metabolic profile. Understanding these markers may help individuals better manage their long-term health risks through consistent dietary choices.
The takeaway
Biological profiles of diet may provide a more accurate measure of health than traditional questionnaires. Incorporating high-quality fats and plant-based foods remains a consistent evidence-based strategy for improving long-term health outcomes.
Further reading
Find more scientific updates on dietary markers in the Nutrition section.
Source note: This article includes information reported by UA.
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