ALL OF NUTRITION SCIENCE in 13 Minutes (No BS)

Nutrition starts with your body extracting and utilizing nutrients. The process begins in the mouth, where food is ground and enzymes start digestion. It then moves to the stomach, an acid tank that breaks down proteins and sterilizes food. Finally, the small intestine absorbs nutrients, aided by villi and microvilli, before the liver processes everything, deciding whether to burn, store, or detoxify.

Carbohydrates are the body's preferred fuel, converting into glucose for immediate energy or glycogen storage. Excess glucose turns into fat. Simple carbs lead to fast energy spikes and crashes, while complex carbs provide sustained energy. Fiber aids gut health and slows glucose absorption. Fats are crucial for brain function, cell membranes, and hormone production, with different types (saturated, monounsaturated, polyunsaturated) having varied effects on the body. Proteins are essential for every cell, built from amino acids, of which nine are essential and must be obtained through diet. Protein also aids muscle building and has a higher thermic effect.

The body converts carbs and fats into ATP (energy) in the mitochondria, requiring micronutrients as co-factors. A healthy metabolism is metabolically flexible, switching between burning glucose and fat. Non-caloric nutrients like water, vitamins (fat-soluble A, D, E, K; water-soluble B complex, C), and minerals (electrolytes, builders, catalysts) are vital for bodily functions, even though they don't provide energy.

The gut, often called the second brain, influences mood and immunity through its microbiome. Fostering beneficial gut bacteria with probiotics and prebiotics is crucial. A compromised gut barrier (leaky gut) can lead to inflammation and immune responses. Cellular breakdown occurs through inflammation (chronic leading to tissue damage), oxidation (free radicals damaging cells), and glycation (excess sugar bonding to proteins, causing stiffness).

Hormones like insulin (storage), dopamine (reward), and cortisol (stress) significantly impact nutrient processing and body composition. Modern processed foods, designed for a 'bliss point,' bypass natural satiety signals and often contain harmful preservatives and emulsifiers. A strategic approach to diet involves: 1) eliminating processed foods, 2) focusing on protein for satiety and muscle preservation, 3) adjusting carb and fat intake based on lifestyle, and 4) using high-quality supplements to address specific deficiencies identified through blood work.