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Personal care · free course

Personal Care

Your skin, hair and teeth are organs you maintain every day — and the personal-care aisle is where marketing outruns evidence fastest. This track separates the few habits with strong evidence (daily sunscreen, a retinoid, fluoride, cleaning between your teeth) from the claims that don't hold up, and teaches you to read a label, weigh a safety scare, and know when to see a clinician.

10 lessons · about 74 minutes

  1. 01Why personal care is a longevity habitSkin is an organ, UV is its main ager, and your gums are linked to the rest of you — with caveats.6 min
  2. 02Sunscreen: the evidence and how to use itThe one skincare product with randomized-trial evidence for cancer and aging — if you apply enough.8 min
  3. 03The actives with real evidenceRetinoids, vitamin C, niacinamide, acids and azelaic acid — what each does, at what strength, and how long to wait.8 min
  4. 04A minimal routine that protects your barrierCleanse, moisturize, protect — then add one active at a time.7 min
  5. 05Reading a labelIngredient order, the Drug Facts box, allergens, and the marketing words with no legal meaning.7 min
  6. 06Ingredient safety without the fearHazard isn't risk, how cosmetics are regulated, and what the evidence says about the usual suspects.8 min
  7. 07Hair: what actually worksName the type of hair loss first — then minoxidil, the prescription options, and the long list that mostly doesn't work.8 min
  8. 08Oral health: the daily habits that countFluoride, cleaning between teeth, electric brushes — and what gum disease really has to do with your heart and blood sugar.8 min
  9. 09Body care, deodorant & fragranceMoisturize smart, exfoliate less than you think, and know what your deodorant and perfume actually do.7 min
  10. 10Your personal-care protocolThe few habits with the most evidence, where to spend vs save, and when to see a dermatologist or dentist.7 min