Vitamin C and niacinamide in the morning. Retinoids at night, always. Hydrating serums either or both.

Serums & Ampoules

Q: What's the difference between a serum and an ampoule?

Mostly concentration and bottle size. Ampoules tend to be stronger and sold for a defined course; serums are the everyday step. Neither name guarantees anything about strength on its own — read the actives.

Q: How many serums can I use at once?

Two is comfortable for most people, one in the morning and one at night. Three is possible if they don't conflict. Beyond that you're mostly diluting your own routine.

Q: Do I still need moisturiser over a serum?

Yes. Serums deliver actives; they don't seal. Skipping the moisturiser is why some people find serums drying.

Q: How long before I know if it's working?

Hydration, days. Oil control and texture, four weeks. Pigmentation and fine lines, eight to twelve. Stopping at three weeks is the most common reason people conclude a good serum did nothing.

Serums, ampoules, essences and booster shots for marks, dullness, texture and barrier repair. Pick one or two actives that match your concern and use them consistently rather than layering five at once.