Quick answer to this topic is yes. Insulin plays a huge role in weight loss. It is secreted by the pancreas to lower blood glucose levels. It then carries nutrients to where ever they need to be placed. First stop is your muscles (glycogen storages) Once those storages are full excess calories are converted into triglycerides and stored as "fat" Insulin is increased based off the amount of carbohydrates one consumes. Just because your losing weight doesnt mean your losing fat. So lets look at the process of "fat" loss now. Your first line of defense for energy is consumed energy. Second line of defense is glycogen storages and once those storages are fully depleted the body will start eating away at fat. As long as insulin levels are elevated and glycogen stores are full your body will have energy right at its disposal so it will have no need to eat away at that precious life saving fat. So considering these things this is how you should go about your nutrition and training timing to get optimal "fat" loss.

Fasted cardio in the morning. Your body will eat away at "fat" for energy since your storages are depleted from the previous day.

Meal one; Protein and fat only. Its not necessary to spike your insulin in a cut. If we were bulking this would be a different story. This meal should be low to moderate calories. Just enough to get you through your lift.

Lift time baby!!!!
Eat protein and fat throughout the workout if your feeling fatigued or really out of it. No need to get a shitty lift in.

Post workout out. NOW we want to fill our empty tummies with loads of protein and carbs to spike that insulin! The second you set that dumbell down is the second repair mode turns on. So its time to feed our muscles and make them bigger and stronger. Fat is not needed for this meal. We mainly want carbs and protein. Id reccomend going with a protein shake with milk. Quick digesting protein to feed the muscles and casein for when the isolate runs out. We also want sugars with this meal to spike that insulin instantly. Preferably stick to your fruits. Bananas and berries will be loaded with fiber and sugar. You also want some complex carbs to keep insulin elevated for when the casein protein is digested and ready for use. Potatoes, pasta or oats are good choices.

Meal three: This is a mixed meal. You want a ratio of 3:2:1 fats:protein:carbs for this one. Prior to this meal weve already fed our body with the essential nutrients to repair itself. Now we just want some more energy to get us through the day without storing an excessive amount of energy.

Meal four this meal is fat and protein only. There is no need to spike your insulin and store energy. We just want to feed our body with the minimum amount of energy it needs to keep going.

Meal;5 (optional) Same as meal four. This is a mandatory no carbs meal we need to keep our glycogen stores depleted for our fasted cardio the next morning so we can burn fat!

It is a must to count calories and macros. By not doing so your just guessing and hoping to lose that fat. Distribute macros throughout the meals accordingly. Weight loss is just energy in vs energy out so if your not losing fat then your energy out put is to low meaning your fat ass aint workin hard enough or your energy intake is to high so your fat ass is eating to much. Implement these simple methods and magic will happen! GOOD LUCK!