The first thing you notice is the hydration. Within a few days all four left my skin softer and a little brighter, but the Meimei EGF NAD⁺ serum was the only one I could genuinely feel working, plump and dewy by morning without any greasy film. The others felt nice going on and not much more.

By week four the fine lines around my eyes and mouth had started to soften. The serums built on real actives, Meimei above all, kept doing the work day after day. The thinner formulas were pleasant enough but the crepey texture on my cheeks barely budged.

By week eight the firmness gains were hard to miss. My jaw and cheeks felt tighter and springier, and Meimei kept pulling ahead. To be fair to the field, numbuzin gave me a real lift along the jawline, Medicube handled the basics on my face and neck, and eqqualberry stayed comfortable and hydrating, though its short review history made me want more proof.

By the end, the lift had held. My skin looked smoother and more even, the sagging around my jaw had eased, and the dull, tired look was gone. Meimei was the one I kept reaching for every night, and I still do. Whichever you skip, skip the one that promises anti-aging but never names a single active.

The word "anti-aging" on a box tells you almost nothing. What matters is which actives are inside and whether they are named. Meimei names its actives outright, EGF, NAD⁺ (Nicotinamide Adenine Dinucleotide), Low Molecular Collagen and 8 Peptides, instead of a vague "collagen" claim on the front with nothing to back it. Plenty of cheaper bottles stop at a pretty label and never name a single working ingredient.

Strong actives are only worth using if your face can tolerate them. A serum that stings or leaves you red is doing more harm than good. The better ones pair their actives with calming, skin-supporting ingredients so the barrier stays happy. Meimei rounds out its EGF and NAD⁺ with Hyaluronic Acid, Panthenol, Niacinamide and Centella, which is why it sat well even on the days my skin felt reactive.

"Clinically proven" printed on a box with no figures behind it is just a phrase. I want to see actual percentages from a study. Meimei backs its serum with a consumer self-perception study: +36.8% hydration after the first use, +29.4% fewer fine lines and +33.1% firmness and elasticity at two weeks, plus +27.6% smoother texture and +24.9% radiance. Results may vary, but at least there are numbers to point at.

Anyone can bottle a serum and slap a name on it. Far fewer will stand behind it once your money clears. Look for a real brand, a clear promise and a return window long enough to actually judge results on your own skin. Meimei gives you a 60-day money-back guarantee, so you have real time to see whether it works before you commit, which is more than most of this category offers.

Read the label closely. If a bottle promises "firming" or "anti-aging" but never tells you what is actually in it, you are paying for a mood, not a result. A serum worth your money names its actives and how much it uses, the way a real one lists EGF, NAD⁺, and its peptide count instead of a vague "collagen" claim.

Plenty of shops bottle the same generic formula under a fresh label with nobody standing behind it. If you cannot find a real brand, a money-back window, or a way to reach a human when something goes wrong, you are on your own the moment the serum does not work.

"Dermatologist approved" and "clinically proven" mean nothing without the actual details. If you cannot find the full ingredient list, the concentration of the actives, and clear direction on how many drops to use and when, assume you are guessing. Skip the guidance and you either see no change or end up irritating your skin.

If a page only shows glossy product shots and a stock photo of flawless skin, you are looking at marketing, not proof. Real buyer reviews, especially before-and-after notes from people who used it for weeks, are what tell you whether a serum actually delivers.