The most useful skin routine is the one you can explain and keep. Start with daily protection and hydration, then choose additional steps for a specific goal. This guide connects the visible signs of aging with the habits and interventions that have been studied.
In this guide
- Why wrinkles form
- 1. Photoprotection has direct human evidence
- 2. Retinoids are among the best-supported topical interventions
- 3. Give hydration a clear role
- 4. Lifestyle changes reduce avoidable damage
- 5. What about collagen supplements?
- 6. What about NAD+, quercetin and resveratrol?
- A practical evidence-first hierarchy
- Where PAG NAD CORE fits
- FAQ
- Related PAG LABS research
- Make the next step a considered one
- Keep the comparison clear
Why wrinkles form
Wrinkles emerge from several overlapping processes: cumulative ultraviolet exposure, changes in collagen and elastin organization, repeated facial movement, loss of hydration, smoking, hormonal and metabolic changes, and normal intrinsic aging. Matrix metalloproteinases such as MMP-1 participate in extracellular-matrix remodeling, but they are one part of a network rather than a single cause. For a deeper look at this pathway, see UV, MMP-1 and collagen remodeling.
1. Photoprotection has direct human evidence
UV radiation is a major modifiable driver of photoaging. In a randomized trial of 903 adults, regular broad-spectrum sunscreen use was associated with less measured skin aging over 4.5 years than discretionary use.
Primary reference: Sunscreen and prevention of skin aging: a randomized trial.
Evidence level: human clinical.
2. Retinoids are among the best-supported topical interventions
A systematic review of randomized controlled trials found topical tretinoin effective for multiple clinical features of photoaging. Retinoids can cause irritation and prescription tretinoin should be discussed with an appropriate clinician.
Systematic review: Topical tretinoin for treating photoaging.
Evidence level: human clinical.
3. Give hydration a clear role
Hydration changes how fine lines look and supports barrier function. That is a legitimate cosmetic benefit even when an ingredient does not reach deep dermal tissue. A product does not need to “rebuild collagen from within” to be useful. The distinction between surface benefit and dermal delivery is explained in the 500 Dalton rule guide.
4. Lifestyle changes reduce avoidable damage
- Do not smoke: smoking is associated with premature skin aging and adds oxidative and vascular stress.
- Avoid excessive UV exposure: sunscreen works best as one part of a broader photoprotection strategy.
- Eat adequately: protein, essential fatty acids, vitamins and minerals support normal tissue maintenance. Extreme restriction is not a skin-longevity strategy.
- Sleep and exercise: both support general health, but claims that a specific sleep duration “restores NAD+ in skin” or rebuilds wrinkles go beyond current clinical evidence.
5. What about collagen supplements?
The literature is mixed. Some meta-analyses pooling randomized trials report improvements in hydration, elasticity or wrinkles, while a 2025 meta-analysis found that benefits were not present in higher-quality or non-industry-funded subsets. This is a good example of why “there are studies” is not the same as “the question is settled.”
2025 systematic review and meta-analysis.
For a direct comparison of evidence types, read Collagen vs NAD+.
6. What about NAD+, quercetin and resveratrol?
These compounds are scientifically interesting, but their evidence levels differ from sunscreen and tretinoin. NAD+ biology is relevant to cellular energetics and stress responses. NR and NMN can alter NAD-related biomarkers in human studies, but PAG NAD CORE contains direct NAD+, not NR or NMN. Quercetin has been used with dasatinib in early human senolytic research; that does not prove quercetin alone clears senescent skin cells. Resveratrol has promising mechanistic and limited clinical skin research, but it is not clinically established as an oral wrinkle treatment.
See the dedicated reviews on NAD+ and skin, quercetin and cellular senescence, and resveratrol and skin aging.
A practical evidence-first hierarchy
- Protect skin from excessive UV exposure consistently.
- Use a moisturizer appropriate for your skin if dryness or barrier disruption is present.
- Consider evidence-based topical actives such as retinoids when appropriate.
- Avoid smoking and support general metabolic and nutritional health.
- Evaluate supplements as optional adjuncts based on their actual human evidence, safety and your medical context.
Where PAG NAD CORE fits
PAG NAD CORE is a dietary supplement containing 500 mg NAD+, 250 mg Quercetin Dihydrate Extract and 150 mg Japanese Knotweed Extract standardized to 98% resveratrol per 2-capsule serving. The complete protocol provides three bottles for a simple, consistent daily routine.
Explore the PAG LABS Research Library or view the exact Supplement Facts.
FAQ
Can wrinkles be removed naturally?
Hydration and prevention can improve appearance, but established wrinkles reflect structural and behavioral factors that rarely have a single “natural” fix. Claims of permanent wrinkle removal from a supplement should be treated cautiously.
What has the strongest evidence for preventing photoaging?
Consistent photoprotection has direct randomized human evidence. Topical tretinoin also has randomized-trial evidence for treating signs of photoaging.
Are supplements useless for skin aging?
No. Some have human data and many are under active study. The key is to distinguish direct clinical skin outcomes from biomarker or mechanistic findings.
Does “inside-out” automatically mean an oral product reaches skin better?
No. Oral compounds still face digestion, absorption, metabolism and tissue distribution. Route of delivery and clinical efficacy are separate questions. See topical vs oral skin-aging interventions for the full comparison.
Related PAG LABS research
- MMP-1 and Collagen: The Biology Behind Skin Preservation
- The 500 Dalton Rule: How to Think Beyond the Surface
- Skin Longevity Supplements: Compare Collagen, NAD+ and Polyphenols
Make the next step a considered one
If a clearly labeled supplement fits your approach, explore PAG NAD CORE: direct NAD+, quercetin and a standardized resveratrol source, organized as a simple daily routine. Review the ingredient forms and research alongside the practices you already use.
Explore the formula: PAG NAD CORE — ingredients, serving size and the 90-day protocol.
Published by PAG LABS, the brand behind PAG NAD CORE. Updated September 13, 2026.
Keep the comparison clear
For the wider context, explore the research table and our guide to comparing supplement labels.