Positives

• One ME/CFS patient credited TUDCA at 250 mg daily with restoring cognitive clarity, eliminating PEM after a crash and even calming his allergic asthma within a week Phoenix Rising.
  
  
• A patient named TUDCA as one of the main reasons he reached full recovery, citing its effects on ER stress and mitochondrial protection Phoenix Rising.
  
  

Negatives

• Patients on Science for ME described insomnia and hyperactivity as TUDCA dose climbed, plus mild diarrhea, abdominal pain or nausea on initiation Science for ME.
  
  
• In ALS trials about 8% of patients stopped TUDCA for GI side effects, showing not everyone tolerates it even at therapeutic doses PMC.
  
  

Hurdles & Side Effects

• A patient comparing TUDCA brands faces wide variation in purity and potency, since most products are sold as supplements rather than regulated drugs Examine.com.
  
  
• Long-term cost is significant because effective ME/CFS doses often run 500-1500 mg daily, and TUDCA is rarely covered by insurance Health Rising.