🔬 Skincare Ingredient Checker
Tick the active ingredients you use and instantly see which combinations may irritate your skin or cancel each other out — plus how to use them safely.
🔧 Check Your Ingredient Combinations
What is an Ingredient Checker?
An ingredient checker helps you layer actives safely. Some powerful ingredients work beautifully alone but clash when applied together — causing redness and peeling, or quietly reducing each other's effectiveness. Knowing which pairs to keep apart lets you get results without wrecking your skin barrier.
Select the actives in your routine and this tool flags the well-known conflicts and tells you how to work around them, usually by splitting them between morning and night or alternating days. Always introduce new actives one at a time.
❓ Frequently Asked Questions
Which skincare ingredients shouldn't be mixed?
Common cautions include retinol with strong exfoliating acids (AHA or BHA), which can over-exfoliate and irritate the barrier; retinol with benzoyl peroxide, which can oxidise and deactivate the retinol; and vitamin C with benzoyl peroxide, which can reduce vitamin C's potency. This checker flags these well-known pairings so you can plan around them.
Does a conflict mean I can't use both ingredients?
Usually not — it just means you shouldn't apply them at the same time. The simplest fix is to separate them: use one in the morning and the other at night, or alternate them on different days. That lets you keep the benefits of each active while avoiding irritation or reduced effectiveness.
Which combinations are generally safe?
Many ingredients pair well. Niacinamide and hyaluronic acid, for example, are gentle, hydrating, and play nicely with almost everything. Peptides and hyaluronic acid are also low-risk. When in doubt, build up slowly, patch-test, and add one new active at a time so you can tell what your skin is reacting to.
Is this a substitute for professional advice?
No. This is an educational tool based on commonly cited pairings, not medical advice, and it doesn't account for product concentrations, your individual sensitivity, or prescription treatments. For persistent irritation, reactions, or a tailored regimen, consult a dermatologist.