It is also important to note that middle-aged women or older tend to process carbs very poorly and tend to have fat deposits as their primary results in nutrient partitioning when it comes to carbohydrate increases.
Very lean men, on the other hand, can hold quite a bit more muscle glycogen which adds up to less likely getting fat. Just something else to consider. I've seen women respond so well to keto diets but then men try it and while they do cut up, they also tend to lose lots of muscle mass in the process.