I Researched 3 Bestselling Facial Serums So You Don't Have To. Here's What I'd Check Before Buying

I researched 3 bestselling facial serums so you don't have to

If you are shopping facial serums and trying to avoid opening twenty tabs, this is the kind of shortlist I would want to read first. I looked at three serum options that shoppers are paying attention to right now and focused on a simpler question: what would I actually check before buying one?

For this roundup, I am looking at medicube PDRN Pink Peptide Serum, EQQUALBERRY Vitamin Illuminating Serum, and The Ordinary Niacinamide 10% + Zinc 1%. The goal is not to say one product is perfect for every face. The goal is to help you sort the differences faster so you can spend less time guessing and avoid buying a serum that does not fit your routine.

1) medicube PDRN Pink Peptide Serum: the one I'd look at for a glow-and-hydration routine

The medicube angle is the combination of peptide-focused hydration, niacinamide, and that 'pink glow' positioning. If your routine is already built around hydration and you want a serum that feels more like a glow-support step than a bare-bones treatment product, this is the one I would slow down and read more closely.

What I would check first: whether the texture fits morning or night use, whether the ingredient list overlaps with products you already own, and whether you are buying it for a repeat-use routine or just because the Salmon DNA / PDRN wording sounds trendier than your current serum.

2) EQQUALBERRY Vitamin Illuminating Serum: the one I'd compare for a brighter-looking, more even-looking routine

EQQUALBERRY stands out if you want a serum that leans into niacinamide plus vitamin C-style brightening language while still keeping hydration in the mix with hyaluronic acid and vitamin E. That makes it feel like a practical option for someone trying to keep the routine simple instead of layering too many separate bottles.

What I would check first: the exact form of vitamin C used, how your skin usually responds to niacinamide, whether the instructions fit the rest of your routine, and whether this serum is meant to replace an existing brightening step or just add more product clutter.

3) The Ordinary Niacinamide 10% + Zinc 1%: the one I'd look at if I wanted a simpler, more direct niacinamide serum

The Ordinary is the most straightforward option in this trio. If what you want is a simpler niacinamide-and-zinc serum and you do not need the product to feel heavily lifestyle-branded, this is the bottle I would compare first.

What I would check first: whether 10% niacinamide feels like a good fit for your skin, whether your routine already includes a similar active, and whether this kind of formula makes sense for your day-to-day consistency. Even a lower-cost serum is still a weak buy if you stop using it after a few days because it does not feel right in the routine.

How I'd choose between these three without overbuying

My simple filter would be this: choose medicube if you want a more glow-and-hydration-oriented serum experience, EQQUALBERRY if you want a brighter-looking and hydration-friendly routine with a more layered ingredient story, and The Ordinary if you want a more direct niacinamide-focused option with less branding around it.

I would also avoid buying all three at once unless you already know exactly how each one fits your routine. One of the easiest ways to waste money in skin care is to buy multiple overlapping serums because they are all trending, then use none of them consistently enough to know what actually works for your skin.

• Pick one clear serum job first: hydration/glow, brightening support, or a simpler niacinamide step
• Check directions, ingredient overlap, and comfort before stacking multiple new serums
• Use sunscreen and keep expectations cosmetic and routine-focused, not medical or miracle-claim driven