No jargon. No diet rules.

How your body actually uses food

What protein, carbs and fat do, how a meal gets broken down, and when your body burns carbs versus stored fat. Explained simply, with visuals you can play with.

Start at the beginning Calorie calculator

fuel in energy out

Fuel from food (the dots) flows into a cell and becomes usable energy.

Carbohydrate

4 kcal/g

Quick, ready-to-spend energy. Broken down to glucose and either burned now or stored as glycogen.

Protein

4 kcal/g

Raw material for muscle, enzymes and repair. Burned for fuel only as a last resort.

Fat

9 kcal/g

Dense, long-term energy storage plus hormones and cell membranes. Slow to access, nearly limitless.

The tour

Read in order, or jump to whatever you're curious about.

Meet the macros

Protein, carbs and fat: what they actually are and the job each one does.

Vitamins & minerals

The micronutrients that quietly run everything, ranked by how much they matter (especially for building muscle).

Supplements that work

What is actually worth taking, ranked by evidence, and the popular stuff to skip.

What happens to food

Follow a meal from your mouth to your bloodstream and watch it get taken apart.

Energy & storage

ATP, glycogen and body fat: where the fuel goes once it is inside you.

The carb vs fat switch

Drag the dials and watch your body choose which fuel to burn. The "fat-burning zone", explained.

Protein & building muscle

How muscle is actually built, how much protein you need, and why spreading it across the day matters.

Hormones & testosterone

How testosterone is made, what it does, and the other hormones that quietly shape your body.

Your calorie calculator

Estimate the calories you burn in a day, see the formula doing the work, and set a goal.

Will the weight move?

Turn a daily surplus or deficit into a realistic twelve-week weight trajectory.