Fourteen study cards

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Each study card tells the story behind one hair-care habit: who was studied, what was measured, what the study does not show, and three practical steps labelled by what backs them. Every source is printed on the card.

The fourteen cards

  1. No. 01 · The knot count: twelve people, two thousand hairs
  2. No. 02 · The warning signs: 1,178 girls and women in Cape Town
  3. No. 03 · The wash-day survey: 201 caregivers, one question about flakes
  4. No. 04 · The wet-comb rule: one hospital sheet, one textbook line
  5. No. 05 · The satin question: one case report, no comparison
  6. No. 06 · The spring in the strand: single hairs, one minute in water
  7. No. 07 · The curl groups: three raters, 2,880 hairs
  8. No. 08 · The comb count: 480 strokes and two braiding groups
  9. No. 09 · The leave-on time: one guideline, no timed study found
  10. No. 10 · The lab-test notice: biotin, blood tests and two FDA warnings
  11. No. 11 · The ingredient count: 36 ingredients, 20 never trialled
  12. No. 12 · The hairline count: 1,042 schoolchildren, first year to last
  13. No. 13 · The shopping list: six things, two shops, one date
  14. No. 14 · The hair stories: ninety people, remembering

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