Product Combinations to Never Mix
Let me share some product combinations I've learned to never mix – mostly through my own trial and error (and some very unhappy skin moments).
First up: retinol and benzoyl peroxide. This combo is like putting your skin through boot camp – way too harsh! These ingredients cancel each other out anyway, so you're just irritating your skin for no reason. I use retinol at night and save the benzoyl peroxide for morning, or alternate nights.
Multiple acids together? Big mistake. Huge! I once used an AHA toner followed by a BHA treatment, thinking I was being extra thorough. My skin was not happy! Now I stick to one acid at a time, or look for products that already combine them in safe concentrations.
Vitamin C is tricky – it doesn't play well with quite a few ingredients. I keep it away from benzoyl peroxide and niacinamide (though some newer formulations are more stable). I usually use Vitamin C in the morning and save other active ingredients for night time.
Speaking of niacinamide, while it's generally pretty stable, too high a concentration can cause flushing when combined with acids. I started with lower concentrations and worked my way up. Better safe than sorry!
And please, learn from my mistake – don't combine harsh physical exfoliants with chemical ones. Your skin needs a chance to recover between treatments. I keep at least 24 hours between any kind of exfoliation after going a bit too enthusiastic with the scrubs and peels!
Remember, when in doubt, less is more. Your skin is pretty good at taking care of itself – we just need to give it the right tools in the right order!