THE FORMULA
No ingredient in here is a token.
PAD 8%. Niacinamide 7%. Retinol 0.3% encapsulated. Every dose is the concentration proven to work in peer-reviewed clinical trials. No weak actives hidden in proprietary blends. Read the data. Verify the dose. These are the eight clinical actives, what each does, and exactly how much of each is in every bottle.
Dose comparison
Most serums use actives at label doses. Not therapeutic doses.
The difference between something that works and something that looks good on a label.
Clinical threshold = the concentration range used in the studies that produced measurable results. Below this range, most actives don't move a clinical needle.
All 8 actives
What each molecule does. Exactly.
Potassium Azeloyl Diglycinate
95% redness cleared in 6 weeks. Zero adverse events.
Calms visible redness and irritation at the source, not by masking it. Regulates the sebum overproduction that testosterone drives. Rebuilds the lipid barrier after shaving daily destroys it. The reason retinol's first weeks land far gentler here than retinol used alone.
Read the clinical data →
Niacinamide
88% pore reduction in 8 weeks. Three simultaneous mechanisms.
Vitamin B3. Minimises pores by reducing the excess sebum that stretches them. Strengthens the lipid barrier. Inhibits melanin transfer that causes uneven tone. Male skin produces 3× more sebum, which means niacinamide at 7% works harder here than in any women's formula.
Read the clinical data →
3-O-Ethyl Ascorbic Acid
93% brightness improvement at 12 weeks. Stable in formulation.
Vitamin C that doesn't degrade in the bottle. Most Vitamin C serums oxidise into a useless orange before you finish them. Vector ONE uses 3-O-Ethyl Ascorbic Acid instead: a stable ether derivative that penetrates deeper and converts to active Vitamin C inside the dermis. Protects against oxidative damage from day one.
Read the clinical data →
Acetyl Hexapeptide-8
+47% increase in collagen synthesis signalling. Expression line reduction.
Argireline. Softens the repeated muscle micro-contractions that etch expression lines deeper year after year. Fewer contractions mean less mechanical creasing. Testosterone-driven collagen loss speeds up in the 30s and 40s, and this is built for that phase.
Read the clinical data →
Glycerin
+68% hydration within 2 hours. Restores what shaving strips daily.
Pharmaceutical-grade humectant. Draws moisture into the skin from multiple depths simultaneously. Hot water and shaving strip the lipid barrier every morning. Glycerin at 4% reverses this within hours, not days. The fastest-acting molecule in the formula. You'll feel the difference before the week is out.
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Palmitoyl Tripeptide-1
Stimulates fibroblasts to increase collagen-I mRNA expression by 47%.
Matrikine peptide. Signals your skin's fibroblasts to produce new collagen, addressing the structural cause of aging, not just the appearance. Works over weeks, compounds over months. Pairs with PT-7 for synergistic effect neither delivers alone.
Read the clinical data →
Palmitoyl Tetrapeptide-7
Reduces IL-6 and IL-8 cytokines by 30–40%. Quiets cellular inflammation.
The partner to PT-1. While PT-1 builds new collagen, PT-7 prevents inflammatory pathways from breaking it down. Two-peptide synergy: one builds, one protects. Works at the cellular level on the aging processes that accelerate fastest in men over 35.
Read the clinical data →
Encapsulated Retinol
44% fewer wrinkles at 12 months in a published RCT. Far less peeling than raw retinol.
The most clinically-proven anti-aging active available without a prescription. 0.3% encapsulated = gradual time-released activation. Your skin eases into it with far less of the 2-week peeling phase that raw retinol causes. Comparable collagen growth to prescription tretinoin, without the pharmacy visit.
Read the clinical data →Formulation science
Why these 8 together outperform any 3 separately.
Skincare fails when actives conflict. This formula was built so each ingredient makes the others work harder.
PAD is why retinol's first weeks hit far gentler here
Retinol at 0.3% accelerates skin cell turnover and triggers an inflammatory cascade in the first weeks. Most men quit before it works. PAD at 8% buffers that inflammatory response at the receptor level before retinol activates. Same pathway, intercepted earlier in the chain. In clinical testing PAD produced zero adverse events, comparable to placebo. It's the reason 0.3% retinol is in this formula at all.
PT-1 builds. PT-7 stops the breakdown.
Net collagen has two sides: production and destruction. PT-1 stimulates fibroblasts to synthesise collagen-I, elastin, and hyaluronic acid: the structural materials. PT-7 lowers IL-6, a cytokine that switches on matrix metalloproteinases. Those enzymes dismantle collagen faster than the body rebuilds it. Combined clinical data: 45% reduction in deep wrinkle volume after 2 months. Research confirms the combined effect is greater than either peptide used independently. You cannot address net collagen loss with only one of them.
Niacinamide + PAD: the male sebum stack
Niacinamide inhibits 5α-reductase, the enzyme converting testosterone into DHT, the molecule directly responsible for sebum overproduction. The correlation between oil output and pore size is measurably stronger in men (r=0.47) than women (r=0.38). PAD attacks the same problem from the inflammatory angle, reducing the redness and disruption excess sebum causes. Neither achieves what both do together. The 88% pore reduction and 95% redness reduction in clinical data reflect a dual-pathway assault on the same root cause.
Why PAD, not azelaic acid
Azelaic acid requires pH 3.5–4.5 to stay soluble and active. Retinol degrades rapidly below pH 5.0. Put both in the same formula and you have a contradiction: either azelaic acid is active, or retinol is intact. Not both. PAD is the potassium salt derivative of azelaic acid's active part: identical soothing and sebum-regulating mechanism, fully stable at pH 5.5–6.5. The choice of PAD over azelaic acid wasn't a compromise. It was the only formulation decision that allowed 0.3% retinol to exist in this bottle undegraded.
Why standard Vitamin C would break this formula
L-Ascorbic Acid requires pH 2.5–3.5 to function. At this pH two things happen: it reacts with niacinamide and can release niacin, the form that flushes skin red, and its breakdown in light doubles when niacinamide is present. You cannot have working L-Ascorbic Acid and working niacinamide in the same formula. 3-OEA is a stable ether derivative that needs no acidic environment. It penetrates at pH 5.5–6.5 and converts to active Vitamin C enzymatically inside the dermis. Full Vitamin C efficacy. Full niacinamide efficacy. No reaction between them.
AH8 + retinol: structural and neuromuscular
Expression lines form two ways: the dermis thins (collagen loss), and repeated muscle contractions groove the same lines deeper mechanically. Retinol addresses the first: it upregulates collagen-I synthesis and accelerates cell turnover to rebuild the structural foundation. AH8 addresses the second: it competitively inhibits SNAP-25, a SNARE complex protein, reducing the neurotransmitter release that drives facial muscle contraction. Clinical trial: 49% reduction in wrinkle depth after 4 weeks at 10% AH8. Two actives. Two completely separate mechanisms. One shared target.
What to expect
Results don't happen overnight. Here's when they do.
Hydration surge
Glycerin at 4% restores the barrier shaving has been stripping. You'll feel it before you see it. Tightness gone, skin no longer pulling after washing.
Skin adjusts, then redness eases
PAD starts calming the redness cycle at source, so post-shave redness eases. Some skin tingles or flushes for a few nights first as it adapts to the actives. That settles as sebum normalises and the skin stops fighting what you put on it.
Tone starts evening
Niacinamide inhibits the melanin transfer that creates uneven patches. 3-OEA starts brightening. The grey morning look in the mirror begins to go.
Visible pore reduction
88% pore reduction is measured at week 8 in clinical trials. Texture improves as retinol accelerates cell turnover. This is when others start asking what you're doing differently.
Straight answers
Questions men actually ask before buying a serum.
Far less than raw retinol, and here is why. PAD at 8% is in the formula first, calming the skin's inflammatory response before retinol activates and buffering the flare that retinol alone triggers in week one. In clinical testing, PAD showed zero adverse events, comparable to placebo. The encapsulated retinol then releases gradually rather than flooding the skin at once. Strong actives can still tingle or flush in the first weeks as your skin adjusts. That is the formula working, and it settles.
Two differences that matter. First, dose: The Ordinary Niacinamide 10% is a single-active product. Paula's Choice Niacinamide + Retinol uses 0.1% retinol, three times less than Vector ONE's 0.3%. Second, formulation synergy: most multi-ingredient serums stack actives that compete. The Vector ONE formula was built around PAD enabling retinol, and the two-peptide system (PT-1 + PT-7) working together. You'd need 5 to 7 separate products from The Ordinary to replicate the active coverage, at higher total cost, with the risk of incompatible layering.
The formula was specifically built with this in mind. PAD at 8% is one of the most soothing actives in cosmetics, and it's the first thing your skin receives in each application. Clinical studies showed PAD produced zero adverse events compared to placebo. The retinol is encapsulated, meaning time-released rather than shock-delivered. Some tingling in the first weeks is normal as strong actives settle. If you react within 120 days, full refund.
Week 4–6 is when the published timelines put the first visible change in the mirror. Redness and texture improve first (week 2), then tone and pore size (week 4–6), then wrinkle depth (month 3 onwards). The RCT measuring 44% wrinkle reduction ran for 12 months. That's the compounding effect of consistent retinol use. Take photos at week 1 and week 8 and you will see the difference in texture and tone.
The maths
Eight clinical actives. Under 6 kr a day.
All eight. Full dose. One formula.
Under 6 kr a day. Results or a full refund within 120 days. No questions, no return required.
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