Week 1 of 12 · Full lesson

Protein foundations.

The teaching behind this week's one thing. Read it when you want the why; the page you came from has everything you need to do the week.

The science

The three jobs of protein — tap a card to see it move

Interactive

Builds muscle

Provides amino acids to build and repair lean tissue after training.

Training breaks it down. Protein rebuilds it.

See it in motion

Supports fat loss

Supports lean mass and increases the cost of metabolism. Helps shift the system toward using stored energy.

More lean tissue means higher energy demand at rest.

See it in motion

Controls appetite

Improves satiety signaling. Hunger becomes easier to manage when protein is sufficient.

Hit the target and cravings drop.

See it in motion

Training breaks muscle down. Protein rebuilds it. Amino acids from your meals repair the damage — miss the target and the rebuild stalls.

More lean tissue = a bigger engine, running all day. Muscle burns stored fat even at rest. Protein keeps the engine; fat becomes the fuel.

Protein tells your brain you're full. Hit your number and the hunger bar drops on its own — no willpower required.

Your protein target is based on lean body mass — not total weight. Muscle, organs, and bone require protein. Fat does not.

Using total body weight overestimates needs for those carrying more fat and underestimates for lean athletes. Lean mass gives you the correct number.

Example: A 200 lb athlete at 25% body fat has 150 lb of lean mass. At 0.7g per lb, the target is 105g — not 140g.

Adequate protein

Muscle preserved or built

Fat is the primary fuel

Recovery is faster

Hunger stays manageable

Insufficient protein

Body cannibalizes muscle

Fat burning stalls

Recovery drags

Cravings spike

If protein is too low, recovery slows and lean mass is lost. Training breaks tissue down — protein rebuilds it. Miss the target and the system adapts in the wrong direction.

Protein works best when distributed across meals. Aim for 3–4 feedings that hit a meaningful dose each time.

This improves absorption, supports recovery, and stabilizes appetite.

This week is about accuracy, not guessing. Weigh your food. Log your intake.

Know your number before you try to improve it.

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