Before and after photos of a man who lost 100 pounds in weight.
Dan Brown before and after his body transformation.
  • Dan Brown was prescribed Ozempic to treat his diabetes and help him lose weight.
  • He lost 30 pounds but, after ditching the shots and doing the keto diet, shed a further 120 pounds.
  • The 59-year-old got the wake-up call after his diabetic mom needed a kidney transplant.

This as-told-to essay is based on a conversation with Dan Brown. It has been edited for length and clarity.

At my heaviest, I weighed 305 pounds. I now weigh 155 pounds — 12 pounds lighter than I did when I graduated high school at 18.