I found this announcement of a follow-up study [1], which > will see 140 people with Type 2 diabetes spend between eight and 20 weeks consuming just 800 calori

I found this announcement of a follow-up study [1], which > will see 140 people with Type 2 diabetes spend between eight and 20 weeks consuming just 800 calories per day, mainly in the form of nutritionally-complete formula shakes. The phrase "nutritionally-complete" indicates a meal replacement; probably not Slimfast or Ensure, neither of which is suitable for 100% meal replacement, but something like Huel or Soylent, which are. However, being a medical operation, I would bet it will be some hospital-approved TPN [2] such as Jevity [3]. [1] https://www.diabetes.org.uk/About_us/News_Landing_Page/Low-calorie-liquid-diet-study-launched https://www.diabetes.org.uk/About_us/News_Landing_Page/Low-c... [2] https://en.wikipedia.org/wiki/Parenteral_nutrition https://en.wikipedia.org/wiki/Parenteral_nutrition [3] https://nutrition.abbott/uk/product/jevity https://nutrition.abbott/uk/product/jevity