Plate Nº 66 · recorded November 12, 2026
Health & Medicine ResearchReported finding
Two Diets Cut Calculated Heart Risk by 10% in Eight Weeks
In eight weeks, DASH and a fruit-and-vegetable diet each cut calculated 10-year heart disease risk by about 10% versus a typical American diet, a new analysis finds.
By Marcus Bennett3 min read595 words
In brief
- Estimated 10-year cardiovascular risk fell 10.3% with DASH and 9.9% with a fruit-and-vegetable diet over eight weeks.
- The analysis covered 459 adults aged 22 to 75 with no cardiovascular disease, published in The American Journal of Cardiology.
- DASH lowered systolic blood pressure more strongly but also reduced HDL cholesterol, partly offsetting its score advantage.
- The difference between the two healthy diets was not statistically clear.
- The score change is not proof of prevented heart attacks; long-term outcomes require further research.
Two everyday eating patterns lowered a calculated 10-year cardiovascular risk score by roughly 10% in just eight weeks, according to a new analysis in The American Journal of Cardiology. Eating more fruit and vegetables achieved a 9.9% reduction; the DASH diet achieved 10.3% — and both beat a typical American-style control diet.
For clinicians and dietitians, the takeaway is immediate: measurable cardiovascular risk factors respond to food within weeks, and patients now have two evidence-based patterns to choose from rather than one supposedly perfect menu.
What did the study actually measure?
Researchers from Beth Israel Deaconess Medical Center and Harvard Medical School reanalyzed the original DASH trial, which enrolled 459 adults aged 22 to 75. None had cardiovascular disease, and none took blood pressure or diabetes medicines.
Each participant was randomly assigned to one of three carefully controlled diets for eight weeks:
- A typical American diet
- A diet emphasizing fruit and vegetables
- The DASH diet — short for Dietary Approaches to Stop Hypertension — which combines abundant produce with low-fat dairy, whole grains, lean protein and less saturated fat
Because the trial provided the food under controlled study conditions, the researchers could compare the eating patterns directly — something a survey of self-reported food habits cannot do. The team measured blood pressure and blood fats before and after the intervention, then fed those numbers into an established calculator that estimates the chance of developing cardiovascular disease over the next decade.
How did the two diets compare?
The difference between the two healthy diets — 10.3% versus 9.9% — was not statistically clear. In plain terms, either pattern improved the risk score to a similar degree.
Each diet carried a distinct profile on individual measures. DASH had a stronger effect on systolic pressure, the top number in a blood pressure reading, giving it an advantage over the produce-focused diet on that measure alone.
But DASH also lowered HDL cholesterol, often called good cholesterol. Because HDL feeds into the risk calculator, that drop offset part of the estimated advantage from the blood-pressure improvement. The study authors note this does not establish that the diet harmed the heart.
Why the hedging matters
The headline numbers describe a relative change in a risk score, not a count of heart attacks prevented. The score combines several measurements through a prediction equation. A short-term shift in that calculation cannot substitute for following people long enough to learn who actually has a heart attack or stroke.
The trial's design adds a second caveat. Participants received controlled diets, which may be easier to follow under study supervision than in ordinary life, where people shop, cook and eat under far messier conditions.
That limitation cuts in a useful direction for practice. The results support practical counseling about food choices and the likely short-term changes in risk factors, while longer-term outcomes remain the job of other research.
What should practitioners take from it?
The findings give a realistic reason for hope: everyday eating changes can move measurable risk factors within weeks, not years. They also show why researchers must distinguish improvements in blood pressure or cholesterol from proof of lasting health outcomes.
The analysis suggests two parallel counseling messages. Adding produce works on its own, and improving the overall eating pattern — the full DASH structure of produce plus low-fat dairy, whole grains and lean protein — works too. The data support attention to both rather than a search for one ideal menu.
Two diets, eight weeks, one shared result: eat differently, and the risk calculator notices.
via knowridge.com (Source)
More from Marcus Bennett
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News editor covering regulation, policy and their impact on general science news at SciBeat.
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