What the research says: Diet and Long COVID
Long COVID affects an estimated 400 million people worldwide. Common symptoms include fatigue, brain fog, breathing problems, gut issues, and reduced quality of life. There’s no cure yet, so treatment focuses on managing symptoms — and diet may help.
What the study looked at
Researchers reviewed 50 studies from 24 countries (2020–2025), looking at:
- Vitamins and minerals (like vitamin D, zinc, magnesium)
- Amino acids (like L-arginine and creatine)
- Multivitamin/nutraceutical supplements
- Gut-health supplements (probiotics)
- Overall eating patterns, like the Mediterranean diet
What they found
- 76% of studies showed some improvement in symptoms.
- Biggest improvements: fatigue, mood, thinking/memory, physical function, and inflammation markers.
- Strongest evidence for: amino acid supplements, multivitamin/nutraceutical formulas, gut-health treatments, and programmes combining diet with other lifestyle support.
- Vitamin D was studied the most. On its own, results were mixed — but combined with vitamin K2 or magnesium, results were more consistently positive.
Why it might help
Nutrition may support recovery by:
- Reducing inflammation
- Improving energy levels
- Supporting blood vessel and immune function
- Restoring gut balance
The catch
Many studies were small or short. We need bigger, longer trials — especially ones looking at whole-diet approaches — before we can say for certain what works best.
Bottom line
Diet and nutrition are a low-risk, accessible way to potentially ease Long COVID symptoms.
It’s not a cure, but it’s a piece of the puzzle worth exploring.
