If your skin routine feels crowded, the easiest way to choose a serum is to decide whether you want glow or oil-and-mark control.
Vitamin C
Choose vitamin C if your main goal is brightness, dullness reduction, and a fresher-looking face.
Niacinamide
Choose niacinamide if you want a calmer routine for oil, blemishes, or uneven tone.
Easy rule
If you are a beginner, pick the serum that matches your biggest visible issue instead of trying to solve everything at once.
Minimalist Vitamin C and Plum Niacinamide are the two most useful starting points in this category.
