I stared December 2015. I had injured my spine, put on 50+ pounds on top of not eating healthy. I lost 80 pounds within a year, Took a break, close to a year.. gained muscle n then probably put on ten pounds by just eating too many carbs for dinner, even though I wasn't eating carbs for breakfast and very low carb for lunch. I'm vegetarian so I eat a lot of the same stuff over n over again just prepared differently. This round of my keto journey will be 3 weeks Thursday. I've been going to the gym atleast 5 days a week, doing targeted exercises on my problem areas & I ride my bicycle at least 5 miles a day.
Results may vary depending on your commitment, follow through, and metabolism.