NAD+ Skincare: Building a Slow-Aging Toner and Peptide Routine
How to layer the numbuzin No.9 NAD+ PDRN Glow Boosting Toner with the COSRX 6 Peptide Skin Booster Serum for daily firmness and radiance.
An NAD+ skincare routine works best when the active is applied closest to clean skin, followed immediately by a peptide-rich serum. These two steps together — the numbuzin No.9 NAD+ PDRN Glow Boosting Toner first, the COSRX The 6 Peptide Skin Booster Serum second — cover hydration, firmness, and radiance without overloading the skin.
Who This Routine Is For
If you are starting to think about long-term skin quality — not covering anything up, just keeping your skin functioning well — this pairing is worth understanding. Both products are formulated for all skin types, including sensitive. The toner contains salmon-derived PDRN, so skip it if you have a fish sensitivity, and if you are pregnant, breastfeeding, recovering from a procedure or on prescription medication, check the brand's current guidance and ask your doctor.
The routine suits anyone interested in an NAD+ skincare approach: built around coenzyme-based and peptide-driven actives rather than exfoliation. It works morning and evening, and the morning version slots neatly under sunscreen.
The Order and Why It Matters
Texture drives layering logic here, and conveniently both products share the same profile: thin, fast-absorbing, serum-liquid consistency with no heavy residue. What separates them is their role.
The numbuzin No.9 NAD+ PDRN Glow Boosting Toner goes on first, directly after cleansing. It functions at an essence level — its job is to condition the skin barrier and begin delivering active ingredients before anything else sits on top. Applying it to bare skin means the NAD+, salmon PDRN, and adenosine reach the surface without having to pass through other product layers.
The COSRX The 6 Peptide Skin Booster Serum follows immediately. The brand recommends it as a preparatory first step that can amplify the absorption of whatever comes after — here, that logic reverses slightly, because the toner has already set the stage. Applied second, the serum's six peptide actives, hyaluronic acid, and amino acids layer over a skin surface that has already been primed and softened. The combination feels like one seamless step rather than two distinct ones.
The Toner: NAD+ and PDRN Together
The numbuzin No.9 NAD+ PDRN Glow Boosting Toner is built around two main actives. NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme involved in cellular energy processes, and it appears here alongside what the brand describes as 1,000 ppm salmon PDRN — a DNA fragment derived from salmon, included to help support hydration and a healthy-looking complexion.
Beyond those two, the formula includes niacinamide (which also appears high in the COSRX serum — more on that below), adenosine, ceramide NP, and what the brand describes as over 50 types of peptides. The finish is dewy and the absorption is fast, so there is no waiting period before you apply the next step.
Apply it by pouring a small amount into your palms or onto a cotton pad, sweeping gently across the face and neck, then patting to help it absorb. The brand recommends morning and night, and lists it as the first step in the No.9 line protocol. Follow it immediately with the serum.
The Serum: Six Peptides, One Step
The COSRX The 6 Peptide Skin Booster Serum is designed to address multiple concerns — firmness, hydration, texture, tone, and pores — without requiring you to use six different products. Its six peptide actives include Acetyl Hexapeptide-8, Copper Tripeptide-1, and Oligopeptide-68, alongside niacinamide and sodium hyaluronate.
