Starvation mode?????

Assuming that the estimates for your calorie burns are accurate, why would you *want* to eat less?

Starvation mode isn't a thing, but most people feel better when they adequately fuel themselves. It can help prevent cravings, improve energy, and ensure you're meeting your nutritional needs. Also, if you eat less than you need, you run the risk of losing more muscle relative to fat.

"Starvation mode" is kind of a fad term.... there is no chance you can gain weight while calorie deficit that is simply not possible... its like trying to build a bigger house with fewer bricks lol. That being said going too low calorie is not healthy for you, low calorie intake is also often related to lower amounts of the micronutrients that every system of your body relies on to work efficiently. For example anorexics that die from there disease more often than not die of an organ failure, Heart disease is the number one cause (Bradycardia) and that is because the lower amount of nutrition also results in a lower amount of key minerals that are are critical for maintaining the electrical signals to maintain a proper heart rate.

Being too low in calorie for a long period of time is detrimental to several systems in the body including the endocrine system where your cortisol levels can increase, cortisol is a known to also cause a higher level of insulin which can increase your cravings for the sugary junk food and promote storage of fat. Now this will only happen if you intake an excess of calories as stated before, but going too low calorie for long periods of time can increase cortisol and insulin and if you then go back to a more normal calorie intake the higher amount of those hormones can encourage fat (adipose storage). And the increase of insulin will make it very hard not to cave to those sugary treats, which absolutely will cause you to gain fat.

The above is precisely why fad crash diets never work long term, because they are unsustainable for the rest of your life. A typical female should be taking 2000 calories minimum and a male should be no less than 2500. Now when trying to lose weight if you reduce your calorie intake by a reasonable amount like -500 calories per day... I'm all on board. But anyone who supports diets of 800-1200 calories a day is not considering all the effects it has on your body.

Starvation mode as being described is incorrect but to think too low calorie can't have repercussions is not true.

Just remember it took a long time to gain that weight... years even... to try and get it all off in 6 or 8 weeks by plummeting your calories is not the right approach. Maintain a manageable calorie deficit and make sure those calories are from good sources, work on burning more calories not just relying on eating less and you'll get there.

Best of luck