No. 9 NAD+ BIO Super Defense Glow Sunscreen

Here's a question that more sunscreen brands should take seriously: if your sunscreen is the product that sits on your face for the longest continuous stretch of any day, why shouldn't it also be one of the most active products in your routine? Numbuzin's No. 9 NAD+ BIO Super Defense Glow Sunscreen takes that question and runs with it, packing an ingredient list that looks more like an anti-aging serum than a UV shield.

The sun protection comes from a four-filter chemical system registered with the FDA: avobenzone at 3% for UVA coverage, homosalate at 7%, octisalate at 5%, and octocrylene at 5% for UVB protection and avobenzone photostabilization. This is a well-established filter combination used across hundreds of sunscreen formulations — it works, it's proven, and in this formula it delivers Broad Spectrum SPF 50. Nothing experimental here. The protection is solid.

What happens beyond the UV filters is where things get interesting. Numbuzin loaded the inactive ingredient portion with their No. 9 line's anti-aging technology, starting with NAD+ (Nicotinamide Adenine Dinucleotide). The theoretical appeal of NAD+ in a sunscreen is compelling — UV exposure depletes NAD+ in skin cells, compromising the DNA repair mechanisms that prevent photoaging. Providing exogenous NAD+ during UV exposure could theoretically support those repair pathways in real time. Whether topical NAD+ achieves this at the concentrations present here is unproven, but the logic is scientifically sound.

Nine peptides from the broader No. 9 complex are included: Acetyl Hexapeptide-8 (Argireline), Copper Tripeptide-1, Palmitoyl Pentapeptide-4 (Matrixyl), and six others targeting various anti-aging mechanisms. In a sunscreen that sits on your face for 8-12 hours, these peptides have significantly more contact time than they would in a serum that's quickly absorbed and layered over. Whether extended surface contact translates to better peptide performance is uncertain, but the opportunity for interaction is real.

The hydration system is genuinely impressive. Seven forms of hyaluronic acid — sodium hyaluronate, hyaluronic acid, hydrolyzed HA, hydrolyzed sodium hyaluronate, hydroxypropyltrimonium hyaluronate, potassium hyaluronate, sodium hyaluronate crosspolymer, and sodium acetylated hyaluronate — create a multi-depth hydration approach that prevents the drying, tight feeling many chemical sunscreens cause. Polyglutamic acid adds another humectant layer, and glycerin provides foundational moisture. This sunscreen actively hydrates rather than simply not dehydrating, which is a meaningful distinction.

The soothing and brightening ingredients round out the formula: centella asiatica extract for anti-inflammatory support, licorice root extract for brightening, houttuynia cordata for antimicrobial calming, allantoin and panthenol for barrier support, and resveratrol for antioxidant protection. Niacinamide, positioned early in the inactive ingredient list, provides barrier strengthening and has independently demonstrated ability to reduce UV-induced immunosuppression — making it a genuinely functional sunscreen ingredient rather than a marketing add-on.

The texture is what sells this product in daily use. It applies as a lightweight cream with a slight luminosity, spreading easily without the white cast that plague mineral sunscreens. It sets to a dewy finish — not matte, not shiny, but genuinely glowy in a way that looks like healthy, well-cared-for skin rather than oily or greasy. Under makeup, it functions as a luminous primer. Without makeup, it gives a polished, bare-skin glow that photographs beautifully.

The dewy finish does come with a caveat for oily skin types, particularly in warm, humid climates. If you already produce excess sebum, the added luminosity from this sunscreen may push you into legitimately shiny territory by afternoon. Matte-finish sunscreen seekers should look elsewhere. But for normal, dry, and combination skin types — and for anyone who wants their SPF to contribute to a healthy glow — this finish is a genuine selling point.

Fragrance-free formulation is a welcome choice for a sunscreen that's worn all day. The chemical filters themselves can cause sensitivity in some users — avobenzone in particular is known to sting around the eyes — but the soothing ingredients (centella, allantoin, panthenol, licorice) do a commendable job of buffering this potential irritation for most skin types.

At $18 for 50ml, this is aggressive pricing for a sunscreen with this level of skincare complexity. The seven-form HA complex alone would justify a higher price point. Add NAD+, nine peptides, resveratrol, centella, and licorice root, and the formulation cost must be significant. It undercuts most Western chemical sunscreens with far simpler formulas, and it outperforms them on the skincare dimension.

This sunscreen represents the direction the category should be heading: UV protection as the baseline, not the ceiling. When your SPF product also delivers meaningful anti-aging, hydrating, and soothing benefits, the distinction between 'protection' and 'treatment' dissolves. Your sunscreen becomes your hardest-working daytime product, which is exactly what it should be given how many hours it spends on your face.

Formula

The Science

The four-filter UV system in this sunscreen represents a well-validated approach to broad spectrum protection. Avobenzone is the primary UVA filter, absorbing across the 310-400nm range. Its known photolability — degradation under UV exposure — is addressed by octocrylene, which acts as a photostabilizer for avobenzone. Research published in Photochemistry and Photobiology (2002) demonstrated that octocrylene-stabilized avobenzone maintains over 90% of its UVA protection after 2 hours of simulated sun exposure.

Niacinamide's role in sun protection extends beyond general barrier support. A landmark study published in the Journal of Investigative Dermatology (2005) demonstrated that topical niacinamide reduces UV-induced immunosuppression in human skin — essentially helping the skin maintain its immune defenses under UV stress. This makes niacinamide a genuinely functional sunscreen ingredient, not merely a marketing addition.

The seven-form hyaluronic acid approach is supported by research showing different molecular weights penetrate to different epidermal depths. Notably, hydroxypropyltrimonium hyaluronate — a cationically modified HA present in this formula — has been shown to bind more strongly to skin surfaces than standard HA, providing longer-lasting surface hydration even under UV exposure conditions.

Polyglutamic acid, also present, has been shown in research published in the Journal of Microbiology and Biotechnology to increase skin moisture content by inhibiting the activity of hyaluronidase — the enzyme that breaks down hyaluronic acid. This creates a protective loop where polyglutamic acid preserves the HA complex's effectiveness throughout the day.

Resveratrol provides complementary photoprotective antioxidant activity. Research published in the Journal of Drugs in Dermatology has shown that resveratrol reduces UV-induced reactive oxygen species and inhibits UV-mediated activation of NF-kB, a key inflammatory pathway in photoaging.

References

1. Photostabilization of avobenzone by octocrylene and diethylhexyl syringylidenemalonate — Photochemistry and Photobiology (2002)
2. Niacinamide reduces UV-induced immunosuppression in human skin — Journal of Investigative Dermatology (2005)

Dermatologist Perspective

Dermatologists consistently emphasize that daily broad spectrum sunscreen is the single most effective anti-aging intervention. This product's SPF 50 chemical filter system is well-established and FDA-registered. Board-certified dermatologists note that the addition of niacinamide provides scientifically validated UV-protective benefits beyond the filters themselves. The NAD+ and peptide additions are viewed as interesting but unproven bonuses. For patients who struggle with sunscreen compliance due to unpleasant textures or white casts, dermatologists may view the cosmetically elegant, skincare-rich formulation as a compliance advantage — the best sunscreen is the one you'll actually wear daily.

Guidance

This sunscreen extends Numbuzin's No. 9 anti-aging line into daytime protection, recognizing that UV damage is the primary driver of skin aging. Rather than making a basic sunscreen with token actives, Numbuzin loaded it with the same NAD+ and peptide technology from their serums — making the case that your sunscreen should work as hard on anti-aging as your treatment products.

About Numbuzin Established Brand (5–20 years)

Numbuzin launched in 2019 under Korea's Benow Inc. This sunscreen extends the No. 9 NAD+ anti-aging line into sun protection, combining FDA-registered broad spectrum SPF 50 chemical UV filters with the brand's signature NAD+ and peptide technology.

Brand founded: 2019 · Product launched: 2025

Myth vs. Reality

Myth

K-beauty sunscreens aren't as effective as Western SPF products.

Reality

This sunscreen is FDA-registered with verified Broad Spectrum SPF 50 protection using four chemical UV filters at standard concentrations. Korean sunscreen testing standards (PA rating system) are actually more stringent than US standards for UVA protection.

Myth

Anti-aging ingredients in sunscreen are just marketing gimmicks.

Reality

While the primary anti-aging benefit of any sunscreen is UV protection itself, the niacinamide, HA complex, and peptides in this formula provide genuine skincare benefits. Niacinamide has been shown to reduce UV-induced immunosuppression and support barrier function, adding real value beyond basic filtration.

FAQ

Common Praise

"No white cast on any skin tone"

"Beautiful dewy glow finish"

"Doesn't feel greasy or heavy despite rich formula"

"Impressive skincare ingredients for a sunscreen"

"Affordable for the formulation complexity"

Common Complaints

"Too dewy for oily skin types in warm weather"

"Chemical UV filters may sting sensitive eyes"

"Limited availability outside of K-beauty retailers"

"Water resistance claims not specified"

Appears In

best sunscreen for glow best k beauty sunscreen best sunscreen for aging best dewy sunscreen

Related Conditions

aging sun damage dullness

Related Ingredients

avobenzone niacinamide hyaluronic acid peptides