references
  
      Optifast: Optifast Proven Benefits
    
      Mayo Clinic: Weight Loss: Diet Plans
    
      Consumers Compare: "Optifast Diet Review"
    
      Diabetes Spectrum: "Meal Replacement Shakes and Nutrition Bars: Do They Help Individuals With Diabetes Lose Weight?"
    
      Mayo Clinic: "Obesity"
    
      AllinaHealth: "OPTIFAST Side Effects"
    
      Mayo Clinic: "What is a gallbladder cleanse? Is it an effective way to flush out gallstones?"
    




Meal-replacement shakes like Optifast are designed to help people lose weight.

Image Credit: Starcevic/iStock/GettyImages

Image Credit: Starcevic/iStock/GettyImages

Optifast programs may be more effective if done in a clinical environment. Clinics that use Optifast will create a program suited to you and your weight loss needs. If you have obesity, medical supervision may be helpful for losing weight.

While some people think gallstone cleanses can relieve gallstones, there’s no evidence that taking laxatives with gallstones has any effect, per the Mayo Clinic.

      Optifast: Optifast Proven Benefits
    
      Mayo Clinic: Weight Loss: Diet Plans
    
      Consumers Compare: "Optifast Diet Review"
    
      Diabetes Spectrum: "Meal Replacement Shakes and Nutrition Bars: Do They Help Individuals With Diabetes Lose Weight?"
    
      Mayo Clinic: "Obesity"
    
      AllinaHealth: "OPTIFAST Side Effects"
    
      Mayo Clinic: "What is a gallbladder cleanse? Is it an effective way to flush out gallstones?"