I heard that organism could slow the metabolism on the calorie deficit, and if you eat literally 100-200 extra calories you would gain weight. Is that true?
re-read what i wrote above
metabolism changes hour to hour and day by day
lions in africa don't get much food during the dry season, yet manage not to waste away and die. and during the good months they don't go obese either
our body has mechanisms in place to effect fat storage and fat burning. its why people get stuck in the wilderness for weeks and survive as long as they have shelter and water. you can go months with no food and be fine