Metabolic Background for Fat Loss Rates

How to approach the problem of losing fat, maintaining or adding muscle, for my purpose of achieving my 170 pound weight goal, and 15% body fat % goal? While keeping in mind, and achieving, my more overriding goal of becoming a Former T2D person?

The data exists for what has been accomplished so far. I can compare the results from "then" to whatever new results I get "after then".

A Brief metabolic review: This overly broad, general, and terse. You can get into as much complication and detail as you can tolerate on this subject matter.

Items of interest:

The human body's liver is one of the most profoundly amazing pieces of Creation. Take care of yours.

Names for stuff that are ingested, and calorie bearing: alcohol, carbs, fats, and proteins. The last 3 are commonly called "macros". Alcohol is just coming out of the "diet confusion" space.

Intermittent fasting (IF, or just fasting) refers to continuous periods of time, generally longer than 16 hours but shorter than 3 days, when humans don't consume marcos.

Ketosis refers to the human body's ability to use fats for energy. Often overlooked is the human body capacity to store and carry around fat, and just how much stored energy that fat represents. For illustration, 200 pound human, 25% body fat, carries around 50 pounds of fat. At an estimated 3,500 kCalories ("calories") per pound, that's 50 x 3500 = 175,000 calories. With a 2,000 calorie per day energy use, that's 87.5 days supply. It is really hard to starve a human by fasting.

The human body has preferences for sources of calorie supply. In order: 1) alcohol, 2) carbs, 3) fats, and 4) protein. Higher order sources take precedence over lower order. For example, if there are carbs available, fats will not be used for energy. Calorie supply that is in excess (not needed in the relatively short term) is either stored or excreted, over time.

Alcohol is metabolized via antitoxin pathways in the liver.

Carbs are either delivered via the bloodstream, for cellular intake, or stay in the bloodstream, as 'excess', AKA hyperglycemia.

Fats are cycled thru triglyceride / free fatty acid / glycerol states and taken into various cells for energy production and/or growth and repair, or are stored, into fat cells, or into the organs (the liver, pancreas, and heart). Too much in the bloodstream is called hypertriglyceridemia. Too much fat in the liver is acronymed NAFLD, non-alcoholic fatty liver disease.

Protein is metabolized to amino acids, and taken up by tissues needing growth or repair. Eventually, remaining amino acids are converted to glucose. Rates of protein uptake are a popular topic.

Given all that, and much, much more, if your body uses more energy than you ingest, you will lose weight. Same way, use less energy than ingested, the energy is stored, primarily as fat, and you gain weight.

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