This is true.
Throughout high school and the army I weighed 190-200, and I was addicted to Mountain Dew since I was 14.
After the army, I hated exercise because it reminded me of P.T. and got as heavy as 245 pounds because I was poor and only had enough to buy a 2-liter of Mountain Dew with a frozen oven pizza per day.
I realized my problem, and started a diet that got me down to 220 pounds, and maintained that weight for years thinking it was fine. I liked the way I looked in the mirror but hated my appearance in family photos. Around November of last year, I realised the mirror was lying to me and the family photos were telling the truth.
I slowly weened myself off of my 20-year-long Mountain Dew addiction, and other foods and sources of sugar. Currently I'm doing caloric restriction, intermittent fasting, and protein shakes. I just weighed myself this afternoon, and I'm 186.0 pounds, and I lost 3 pounds this week alone.
I have a goal of being 170 pounds on October 6th, my 35th birthday, and I'm going to be hitting that goal ahead of schedule.