Episode 7: Retinol, Retinal & The Retinoid Rabbit Hole

Retinol. Retinal. Tretinoin. Same vitamin A family, very different conversion pathway. We break down why the skin only recognises retinoic acid, why the two-step conversion in gentler retinoids is a built-in safety buffer, and how getting this wrong destroys your barrier — especially on melanin-rich skin.

Show notes

Why the skin only has receptors for retinoic acid — and why retinol/retinal's extra conversion steps are a safety buffer, not a weaker version of tretinoin
Stacking a retinoid with an exfoliating acid dissolves the barrier's lipid "mortar" faster than it can rebuild — and the resulting inflammation makes hyperpigmentation worse, especially on melanin-rich skin
"Clean beauty" is an unregulated marketing term, and a clear glass dropper bottle is often worse for active-ingredient stability than an opaque, airless pump