How fat is lost from the body?

[LuisPenaNunez]

Can someone help me understand what makes our body burn the fat we have stored? I have seen people do cardio and lift weight for a long period of time, but they can't lose any pounds, but there are other people that lose weight doing less.

[NearlyNapping]

Glucose is the only thing that gets used for energy. The main source of glucose is from carbs, starting with simple carbs like sugar, then complex carbs and starches.

Fats, protein and alcohol are only indirectly used as an energy source, but only after the carb sources have been used. If used for energy, they also get converted to glucose. Glucose is the ONLY source of energy for humans.

When eaten, fats are used as fats, or stored for later use (such as for energy). Proteins are used to build the body and should not be used for energy at all. Fats are used any time carb sources run out, which may or may not happen during a workout.

Proteins are basically used for energy in emergencies. They are supposed to be to build your body.

Fats are broken down into various fatty acids. Fatty acids are similar to amino acids in the sense that there are essential fatty acids, and the body can manufacture the others that are needed. It's the fatty acids that are stored.

But to answer your question, fats are used for energy, but only after carbs. If someone is lifting and not losing weight, they either have enough carbs for the short term use while lifting, or they replace the fats in their diet as fast as they burn them.

Simple sugars for very short term. Then complex carbs and starches for medium term. Then fatty acids for longer term energy.

[NearlyNapping]

In case you are curious, the pancreas controls and regulates all of this. You've probably heard of the pancreas related to diabetes. Diabetes is when the pancreas is not regulating the glucose levels properly. However, the pancreas also regulates fats, proteins, and most other things about nutrition.

[Kaazsz]

Apparently you breathe it out.

https://www.BBC.com/news/health-30494009

Losing weight has little to do with exercise and everything to do with what you eat.

Technically you can lose fat by eating cake. But if you eat 2000 calories of cake a day to lose weight... well you'll be starving all day because 2000 calories of cake is like two pieces, that shit ain't gonna fill you up.

If you cannot manage calories you won't lose weight. That's the first step. The steps after you manage calories is choosing foods that are healthy. You can try that first, like cutting out soda and sugar and shit like that. But if you eat healthy food but still eat a ton of calories you won't lose any fat.

[Wonderer89]

Diet is the biggest part of losing weight. You literally cannot out-exercise a bad diet.

[TripleAce]

It's a little tricky sometimes, because it can be many things

1. Incorrect caloric consumption
2. Not all calroies are created equal, high fat or high protein
3. Hormones, such as leptin, insulin pp
4. Simply just not working hard enough or consistent enough

[maiez]

When you eat/drink glucose, it goes to muscles, the liver, and fat cells. It mainly has to do with how much of what you eat, so dieting.

Burning fat has to do with how often you eat as well as how active you are. If you haven't eaten in 4 hours, your body will start burning fat cells for energy since there is no food to be burned.

[calza94]

while exercise is important for keeping fit and in shape, the main issue is what you eat, I know it sounds shitty, but you gotta cut out on the junk entirely!

[akadatank44]

80% is diet. What makes our body burn fat thats stored is a caloric deficit.

[Wingedz]

It burns with calories.

[sailorjupiter]

cardio and also diet

[PrincessPanda]

90% is their diet

[Anonymous]

Your body burns it and craps out the waste