Researchers have identified a straightforward nutritional intervention that may help counteract age-related cognitive decline. A new study published in Clinical Nutrition demonstrates that consuming 60 grams of skin-roasted peanuts daily improved cerebral blood flow by approximately 4% in older adults—a magnitude equivalent to reversing one decade of typical vascular aging.
The mechanism behind this benefit lies in arginine, an amino acid abundant in peanuts. Each serving provides 1.8–2.0 grams of arginine, which enhances nitric oxide production and promotes blood vessel relaxation, thereby improving cerebral perfusion. This finding aligns with established cardiovascular physiology and suggests that accessible, affordable dietary choices may support brain health in aging populations.
While further research is warranted to confirm long-term outcomes and establish optimal protocols, this study offers encouraging evidence that nutritional interventions can meaningfully impact cerebrovascular function in older adults.
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