Daily Walnut Consumption Linked to Reduced Inflammation

A new two-year study suggests adding walnuts to daily diets may improve inflammatory markers in older adults.

Updated on Oct. 26, 2026 in Nutrition

Gouache-painted editorial illustration of a handful of raw walnuts on a wooden surface, representing a study on nutrition and wellness. — A two-year study found that healthy adults aged 63 to 79 who consumed raw walnuts daily experienced a significant reduction in dietary inflammation markers. AI Illustration. Upload story photo >

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A clinical trial involving 319 healthy older adults found that eating 1 to 2 ounces of raw walnuts daily for two years significantly lowered inflammatory scores. Researchers utilized the Dietary Inflammatory Index to observe these changes in study participants aged 63 to 79.

Why it matters

The findings help determine if a single food choice can measurably alter overall dietary patterns to promote health in aging populations. Researchers were specifically looking for how nutrient-dense additions might counteract dietary inflammation.

The study utilized the Dietary Inflammatory Index to score diets based on 45 food components. The walnut group saw scores decrease by approximately 0.59 points compared to the control group over the two-year period.

The players

Loma Linda University

Loma Linda University is a private health sciences institution in California known for its long-standing focus on vegetarian nutrition and lifestyle research.

The details

Participants in the Walnuts and Healthy Aging trial added 1 to 2 ounces of raw walnuts to their daily diet, which accounted for 15% of their total daily caloric intake. The beneficial outcomes are attributed to the specific presence of alpha-linolenic acid and polyphenols found in walnuts.

The Walnuts and Healthy Aging trial spanned a duration of two years.

The Big Picture

This research follows the established protocols of the Dietary Inflammatory Index to measure how specific food components impact systemic inflammation. It extends the utility of this index by demonstrating how individual dietary adjustments can lead to measurable shifts in overall inflammatory potential.

For healthy older adults, incorporating 1 to 2 ounces of walnuts into a daily routine may serve as a simple nutritional intervention to improve dietary inflammatory profiles. Individuals should consult with their healthcare provider to see how adding these calories fits into their overall nutritional needs.

The takeaway

Simple adjustments to daily food intake can have measurable impacts on biomarkers related to healthy aging. Implementing nutrient-dense snacks like walnuts may offer a practical, non-pharmaceutical approach to supporting long-term health.