Positives

• A patient found that incorporating more fruits and vegetables into their diet led to “more energy” and improved mental clarity, helping them manage their symptoms better Reddit.
  
  
• A couple dealing with Long COVID for years noted “dramatic improvements” in their health after switching to a plant-based diet, suggesting it played a key role in their recovery process Reddit.
  
  

Negatives

• A peer-reviewed review on B12 in plant-based diets reported high rates of vitamin B12 deficiency among vegetarian and vegan populations, and noted that B12 deficiency is implicated in neuro, vascular, immune, and inflammatory disorders, all of which overlap with Long COVID symptom clusters. PMC.
• BBC Science Focus's deep dive on plant-based diets warned that an irreversible neurological deficit can develop from long-term unrecognized B12 deficiency, and that the only reliable solution is a fortified food or oral supplement, which not all whole-food plant-based purists are willing to use. Sciencefocus.
• A Lifestyle Adjustments in Long COVID Management review acknowledges potential benefits of plant-based diets but notes that data on Long COVID-specific outcomes are largely absent, so a Long COVID patient making this dietary change should not expect proven symptom relief. PubMed.

Hurdles & Side Effects

• One user mentioned the challenge of maintaining a “super restrictive” diet, which can be difficult for some to adhere to long-term, despite potential benefits Reddit.