I skipped most of this thread and am just going to add my experience and views.
2003. 175 lbs. Graduated high school. Ate a lot and was very active.
2004. 195 lbs. After 1 year of university I had gained about 20 lbs. I had 6 or 7 classes a semester and I ate like I was still in high school.
2008. 195 lbs. Graduated university. I ended up eating a lot less and exercising a bit more the rest of my university career.
2009. 190 lbs. Started work and quickly lost 5 lbs. Attributed it to 2 months straight of night shift and just being a lot more active at work than I ever was at school.
2017. 215 lbs. For 8 years. I just gained weight slowly. I would try exercising more (I play hockey, run, walk, bike, hike, etc. I'm not a couch potato), but I also drank a lot more beer and ate a lot.
2018. February. 215 lbs. I started a keto diet without changing my exercise.
2018. July. 185 lbs. My goal is to get to my high school weight and see how I feel.
My Keto Diet:
Omelet (4 eggs, onions, mushrooms, green peppers, cheese), Bacon (3 or 4 slices), Tea (English Breakfast), Apple Cider Vinegar.
Salad (5ish cups of mostly spinach and arugula, mushrooms, cheese, onions, 1 avocado, zero carb dressing), Celery (a few stalks).
I don't eat supper unless I'm hungry (I'm usually not) and then it's just a small snack.
Tea (green, 1 bag, 3 or more cups a day)
Beer (low carb, Michelob Ultra or Sleeman's Clear 2.0, 2 a day, a couple days a week)
Water (as much as I feel like, I have to pee every hour or 2 throughout the day).
Veggies (celery mostly, including lunches I go through 2 bunches a week)
Pork Rinds (if I'm looking for a non vegi snack)
Tuna (mixed with a little miracle whip or mayo I'll eat a can if I am hungry in the evening)
Check out www.dietdoctor.com
. My dad started keto and I was skeptical. I found this site and started researching. FYI, I have never bought any "keto" products to be on this diet.
Just try eating less carbs to start. Make a low carb meal plan and stick with it. I didn't start with the meal plan I have above. I started by just cutting out everything high in carbs (regular beer, bread, pasta, fruit, potatoes, etc). I did that for the first 20 lbs, but then hit a plateau and had to start really counting calories and grams of fat, protein and carbs to start losing again.
Don't be strictly keto. Take breaks. Go a little wild every once in a while. There were weddings and vacations where I ate cake and pasta and drank a lot of beer, but afterwards, I got back in the groove and the weight shedding continued.
Read "The Dorito Effect". It's a great book and I learned a lot about modern food, nutrition and marvelous human body.
Why I Think Keto Works:
Calories in/calories out works great to maintain your weight. It doesn't really matter what those calories are. However, when you are already overweight and eating a lot of carbs, you are getting your energy from carbs converted to glucose. That's good, because that is the natural state of things. Body fat is not carbs and does not get converted to glucose like ingested carbs do. to burn body fat, your body has to convert it to ketones. Your body cannot switch from burning glucose to ketones instantly, so if you are eating a lot of carbs, but less than you are burning, your body runs out of fuel before it can start making more from fat reserves. You get hungry, real hungry, hungry for carbs, so you eat carbs, lots of them, before your body can switch to burning fat/ketones. It's a vicious cycle and it usually doesn't lead to weight loss without a lot of will power and exercise.
When you eat minimal carbs, your body switches to this ketogenesis state where it burns fat converted to ketones as fuel. But it does this everyday and doesn't ever enter the carb as fuel state so it doesn't crave carbs. This means if your body runs our of fat/fuel from food, it simply starts burning fat reserves.
I don't know if keto as a long term diet is healthy. All I know is that it's working for me, and I recommend anyone that wants to lose weight should at least consider it.