Positives

• A patient reported using humic acid as part of a long COVID antiviral protocol and noticed reduced viral-feeling flares over weeks PMC.
  
  
• A retrospective chart review described improved outcomes in COVID patients given humic and fulvic acid alongside EGCG and vitamin C PubMed.
  
  

Negatives

• Patients have raised concerns about heavy metal contamination in unregulated humic acid products and chelation of essential minerals PMC.
  
  
• Some users described stained teeth, nausea, and unpredictable bowel changes that limited daily use Cureus.
  
  

Hurdles & Side Effects

• Quality varies widely between brands, and patients struggle to find third-party tested humic acid distinct from fulvic blends PMC.
  
  
• Potential hypercoagulability and poor bioavailability mean patients want clinician guidance that few US doctors are willing to provide PMC.