For peptide ampoules like collagen serums, it’s usually best to apply them after cleansing and toner but before moisturizer so your skin can absorb the active ingredients properly, and most people use them morning and night, adjusting if you’re also using strong actives like retinol or vitamin C. If you’re unsure about your product or the best way to layer it with your current routine, an
online peptide consultation can give personalized advice on timing, order, and combinations based on your skin type and goals, which can make your routine more effective and help avoid irritation.