Retinol Sandwich Method

Cleanse. Apply a thin layer of hydrating moisturiser (no actives) to dry skin and wait 2 minutes. Apply retinoid (pea-sized, face and neck). Wait 10 minutes, then apply a second layer of moisturiser or occlusive.

Significantly less retinoid stinging, flaking, and redness in the first 4-6 weeks of use. Eventually most people work up to no-sandwich direct application, but the technique is a permanent rescue for rough days or after procedures.

The retinol sandwich is a buffering technique popularised by American dermatologists including Dr. Sam Ellis and Dr. Shereene Idriss. You apply a thin layer of moisturiser first, then your retinoid on top, then a second layer of moisturiser — sandwiching the active between two lipid barriers. The lipids slow retinoid penetration, which reduces irritation and flaking without measurably reducing long-term efficacy. This is especially useful for starters, for tretinoin or high-percentage retinol, and for sensitive skin types who otherwise can't tolerate vitamin A at all. Not to be confused with skin cycling (which is about frequency, not layering). The sandwich is a tolerance tool; you can pair it with skin cycling on retinoid nights.