What happens if I apply skincare products in the wrong order?

Applying products in the wrong order can neutralize active ingredients, cause irritation, or prevent absorption. For example, applying vitamin C after moisturizer reduces its effectiveness by up to 85%. Our tool prevents these costly mistakes.

How does pH affect skincare product effectiveness?

Different ingredients work optimally at different pH levels. Vitamin C works best at pH 3.5, while niacinamide prefers pH 6.0. Our tool automatically orders products by pH for maximum effectiveness.

Can I use retinol and vitamin C together?

Not recommended in the same routine. This combination can cause severe irritation and neutralize both ingredients. Use vitamin C in the morning and retinol at night for best results.

How long should I wait between applying skincare products?

Wait 30-60 seconds between most products, and 20 minutes after acids (AHA, BHA, Vitamin C) before applying other products. Our tool provides specific timing for each product.

Is this skincare tool really free?

Yes, completely free with no sign-up required. We've helped over 15,000 people optimize their routines and prevent expensive ingredient conflicts.