Nutrition & Hydration
The solid and liquid inputs that fuel, build, and repair the body. We treat nutrition and hydration as separate behaviors with separate signals; both deserve their own teaching.
What we cover
- Macronutrients: protein, carbohydrates, fats
- Micronutrients, fiber, and the gut microbiome
- Fluid balance: water intake and the electrolytes (sodium, potassium, magnesium, calcium) every cell runs on
- Meal timing as nutrient delivery
Hydration earned its own billing because plasma osmolality and urine specific gravity are clinically distinct from eating, and on Diabetes Foundations they directly shape glycemic variability. Pharmacologically-acting supplements live under Substances & Therapeutics; meal timing as circadian entrainment lives under Sleep & Circadian.


