Insulin sensitivity is a real thing. The less sensitive to insulin you are, the more of it is produced to process a given amount of glucose. And the more insulin (anabolic) is produced, the less glucagon (catabolic) is.
In other words, low insulin sensitivity means your body remains in the feeding (fat building) state more, as opposed to fasting (fat burning).
Insulin sensitivity decreases with age, and with excessive intake of particularly simple carbs. It can be improved through fasting, certain dietary supplements, and low carb diet.
All of this is, to the best of my knowledge, not disputed or 'bro science'.
In other words, low insulin sensitivity means your body remains in the feeding (fat building) state more, as opposed to fasting (fat burning).
Insulin sensitivity decreases with age, and with excessive intake of particularly simple carbs. It can be improved through fasting, certain dietary supplements, and low carb diet.
All of this is, to the best of my knowledge, not disputed or 'bro science'.