# Obesity and Nutritional Vulnerability in long COVID: A Neuroinflammatory and Cognitive Perspective

## TL;DR

This paper explores how obesity and poor nutrition worsen long COVID symptoms, particularly cognitive issues, and suggests dietary interventions may help.

## Contribution

The paper highlights shared mechanisms between obesity, nutrition, and long COVID neuroinflammation, and proposes integrated care models for recovery.

## Key findings

- Obesity increases long COVID severity through chronic inflammation and blood-brain barrier compromise.
- Poor diet and malnutrition impair neuroplasticity and delay recovery from cognitive symptoms.
- Dietary interventions like Mediterranean and ketogenic diets may reduce inflammation and improve cognitive outcomes.

## Abstract

To examine the interplay between obesity, nutritional vulnerability, and long COVID, with a particular focus on neuroinflammatory and cognitive outcomes. This review synthesizes emerging evidence on shared pathophysiological pathways and evaluates the therapeutic potential of dietary and weight management strategies.

Cognitive symptoms such as brain fog and memory deficits are among the most persistent and disabling features of long COVID. Obesity is associated with more severe manifestations through pathways involving chronic systemic inflammation, compromised blood-brain barrier integrity, and neuroimmune dysregulation. Concurrently, malnutrition and poor diet quality including low intake of antioxidants, omega-3 fatty acids, and micronutrients may impair neuroplasticity and delay recovery. Interventions such as Mediterranean and ketogenic dietary patterns, as well as structured weight loss programs, show promise in reducing inflammation and improving cognitive outcomes.

Obesity and suboptimal nutritional status amplify the neurocognitive burden of long COVID through shared pathophysiological mechanisms. Integrated care models that incorporate metabolic screening, nutritional assessment, and individualized dietary interventions may improve recovery trajectories. Public health strategies that address food quality, obesity prevention, and equitable access to nutrition care are essential for long-term resilience in the post-COVID era.