Positives

• In a 12-week study, patients with prediabetes on bitter melon extract showed reduced post-OGTT blood sugar compared to placebo PMC.
  
  
• Patients describe bitter melon as having anti-inflammatory effects on insulin resistance, with reductions in pro-inflammatory cytokines reported in both clinical and laboratory work Healthline.
  
  

Negatives

• Patients note the blood sugar lowering effect of bitter melon is smaller than 1000 mg per day of metformin, limiting its standalone usefulness in diabetes Medical News Today.
  
  
• Some patients on bitter melon describe gastrointestinal upset including diarrhea and stomach pain that limits daily use WebMD.
  
  

Hurdles & Side Effects

• Patients on diabetes medications face risk of dangerous hypoglycemia when combining bitter melon with insulin, sulfonylureas, or metformin WebMD.
  
  
• Pregnant patients are advised to avoid bitter melon entirely because of historical use as an abortifacient WebMD.