So there are things that do make it more difficult for some people to loose weight. Genetics and gut bacteria to name two. Having lived with my wife for the past 25 years I can tell you she looses weight a lot easier than me. She’s never had a BMI higher than 25 and if she wants to loose any weight she just stops eating cake.
But as the manvfat book says. Those who find it more difficult to loose weight just have to try harder. My wights been fairly stagnant for the past month. I need to try harder.