This might be a stupid question, I might indeed be stupid. But what is the actual process going on inside my body at 290lbs when I go hiking for example?
In: 5
When your insulin levels are intermediate, your body burns fat to sustain most organs and use glucose for the brain and the muscles.
When your insulin levels are low, your body convert proteins to glucose and fat to ketone bodies. Glucose and ketone bodies are used for your brain and muscles, while regular fat is used for your other organs.
When your insulin levels are high, your body convert glucose to fat and use glucose to support all organs. Your fat is not used, it’s being stored.
To use fat, your cells transform it into acylCoA like they do for glucose which then enter the Krebs cycle.
https://open.oregonstate.education/aandp/chapter/24-3-lipid-metabolism/
The carbon of the fat (or glucose too) ends up being linked to oxygen in CO2 and the hydrogen ends up in H2O (water). You get rid of the CO2 by breathing out. You get rid of the H2O by breathing out, peeing and sweating mostly, though you actually need more water for those process than you get from burning fat so you need to drink water too.
If you want to lose fat, it’s best to avoid being in high insulin situation by eating low glycemic load food. You don’t want to eat fructose or fat bearing food either since the fructose will be converted into fat by the liver no matter your blood glucose level and the fat will be stored as fat. It’s best to eat proteins and carbonhdrates that are converted in glucose (like starch) all day long but in smaller portions to avoid getting a high blood glucose level.
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