[OC] 13 months and 67kg (148lb) of weight loss, predicted with CICO (blue line) vs weekly weigh ins (red dots + exponential trend line). Graph in kg

Hello r/dataisbeautiful, first time poster here!

On October 14 2024 I started my weight loss journey at 137.6kg (303lb), with the help of GLP1 drugs. On that day I made a plan, I would eat basically the exact same thing every single day, 1400kcal of frozen individual meals and protein bars, all with a calorie label. That's only 4 items per day, 4 numbers to add up, which makes calorie counting extremely accurate *and* easy, provided you can stomach eating the same thing every day (which if anything I actually prefer)

Thanks to my Apple Watch I also had a pretty accurate idea of my TDEE, and used this as a baseline. Then I made a spreadsheet which each day would calculate how much weight I would lose according to CICO, then adjust my TDEE in response to the weight drop using known formulas fine tuned to my Apple Watch estimate. The blue line in this graph starts lower than the first red dot because I used my week 1 weigh in to eliminate the massive week 1 water weight drop from the data. It's not "real" weight loss.

On Nov. 14 2025, after 13 months of weight loss, I weighed 70.7kg (156lb) which was only half a lb above the prediction I had made for this exact day 13 months prior. I have now been maintaining this weight for the past month