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How it fits together · free course

Body Systems

Your body isn't a bag of separate organs — it's a set of interlocking systems that constantly talk to each other. This track walks through the big five (immune, cardiovascular-metabolic, nervous, gut, and musculoskeletal-endocrine), how they connect, and the specific nutrients each one runs on. Learn to think in systems and 'eat for one thing, help five' stops being a slogan and starts being a strategy.

11 lessons · about 72 minutes

  1. 01Think in systems, not symptomsWhy the body is a network — and why one nutrient helps several systems at once.5 min
  2. 02Immune & inflammationYour two-layer defense system — and the quiet, chronic kind of inflammation that drives aging disease.6 min
  3. 03Cardiovascular & metabolicWhy heart health and blood-sugar health are really one system — and the nutrients that protect both.6 min
  4. 04Nervous system, brain & gutNeurons, neurotransmitters, the 'second brain' in your gut, and the axis that connects them.7 min
  5. 05Musculoskeletal & endocrineThe frame that moves you — muscle, bone, joints — and the hormones that set the body's settings.6 min
  6. 06Skin, hair & nailsYour largest organ and its keratin extensions — what the barrier does, why skin signals inner health, and the nutrients that actually matter (biotin reality-check included).7 min
  7. 07Bone & jointsBone as living, remodeling tissue — density, osteoporosis, and the full supporting cast (calcium, D, K2, magnesium, protein, and load); plus cartilage and collagen for joints.7 min
  8. 08Liver & detoxificationWhat your liver actually does, the two-phase detox machinery it runs on, why 'detox teas and cleanses' are mostly marketing, and how to support liver health for real.7 min
  9. 09Kidneys, fluid & electrolyte balanceYour blood-filtering, pressure-tuning, electrolyte-balancing organs — how filtration works, what hydration really means, eGFR, and how to protect kidney function.7 min
  10. 10Heart-lung enduranceYour cardiorespiratory engine — how oxygen gets from air to muscle, why VO2max is one of the strongest longevity predictors known, and how aerobic fitness (including Zone 2) actually adapts.7 min
  11. 11Reproductive & hormonal systemA high-level tour of the endocrine system, sex hormones across the lifespan, fertility and cycle basics, and the strong two-way link between hormones and nutrition, sleep, and stress.7 min