SkinLabs
    Episode 4: Ingredient Drama cover art
    4,778 plays

    7 min · Published 2026-09-11

    Retinoids 101Ingredient Science

    Episode 4: Ingredient Drama

    The essential skincare chemistry class: the layering rules that actually matter, real power-couple ingredients, the dangerous duos to never mix, and the damage-control routine if you've overdone it.

    Show notes

    • The three layering rules: thinnest-to-thickest, lowest-to-highest pH, and water-based before oil-based
    • Real power couples — vitamin C, E and ferulic acid; retinol with niacinamide and hyaluronic acid — plus the "sandwich technique" for sensitive skin
    • Dangerous duos to never mix (retinol with AHA/BHA acids, benzoyl peroxide with retinol or vitamin C) and the damage-control routine if you've overdone it

    Chapters

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    Episode 5: SPF Is Not Optional

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    Listener discussion

    • SunithaS_Randburg

      Really enjoyed this episode — the section on ingredient myths was more balanced than most of what I see online.

      2026/06/02

    • DrNirvana_Paarl

      Good episode. The framing on ingredient myths is closer to what I'd actually tell a patient than most podcasts manage.

      2026/07/03

    • SunithaW

      Good episode overall, though I think the take on ingredient myths glossed over a few of the counterarguments.

      2026/07/21

    • KagisoR

      Can you do a follow-up on sunscreen reformulation next? Would pair well with this one.

      2026/07/23

    • Buhle_DBN

      The bit about ingredient myths matches my own experience almost exactly. Glad someone's saying it out loud.

      2026/08/16