Mirror, mirror on the wall, who has the healthiest skin of them all? Individuals who use NAD+ supplements or those with collagen supplements? 

NAD+ vs collagen for skin aging: which one works?

They act at different layers of skin biology and are complementary, not substitutes. Collagen peptides supply signaling amino acids that raise skin elasticity by around 20% over 8 weeks (Bolke 2019). NMN raises cellular NAD+, restoring fibroblast energy and DNA repair, with a 12-week RCT showing improved skin elasticity and hydration (Miyawaki 2023). Structural signaling vs cellular resilience.

Before we figure that one out, let’s see what our skin goes through with aging: 

• Becomes thinner and loose 
• Loses glow, moisture, and smoothness 
• Takes longer to heal scratches and cuts 

In the pursuit of ageless skin, individuals often turn to supplements as a key player in their skincare routine. Two supplements gaining attention for their potential anti-aging benefits are NAD+ (nicotinamide adenine dinucleotide) and collagen.  

While collagen is commonly associated with skin elasticity, NAD+ is emerging as a potential game-changer, targeting the root causes of skin aging. In this blog, we explore the scientific basis behind these claims, drawing on reputable sources to highlight why NAD+ supplements might offer a more comprehensive solution. 

Collagen Supplements: A Surface-Level Solution 

Collagen is a structural protein abundant in the skin, responsible for its firmness and elasticity. As we age, collagen production declines, leading to wrinkles and sagging skin. Collagen supplements aim to replace lost collagen, providing visible improvements. However, studies suggest that these benefits may be more superficial, addressing symptoms rather than the underlying causes of aging (Smith-Mungo & Kagan, 1998). 

NAD+ Supplements: Targeting Cellular Aging 

NAD+ is a coenzyme essential for cellular processes, including energy metabolism and DNA repair. Research indicates that NAD+ levels decline with age, contributing to cellular dysfunction. NAD+ supplements, through precursors like nicotinamide riboside (NR) or nicotinamide mononucleotide (NMN), aim to boost cellular NAD+ levels. This approach targets the root cause of aging, potentially offering more profound and long-lasting benefits (Cantó et al., 2015). 

Beyond Skin Deep: NAD+ as a Holistic Solution 

One key advantage of NAD+ supplements lies in their impact beyond skin health. By supporting mitochondrial function, NAD+ contributes to overall cellular rejuvenation. Studies suggest that enhanced NAD+ levels may positively influence various organs and tissues throughout the body, offering a holistic approach to aging (Verdin, 2015). 

• Energy Production (Mitochondrial Function): NAD+ is a key player in cellular respiration, the process by which cells generate energy. It is involved in both glycolysis (the breakdown of glucose) and oxidative phosphorylation (the production of ATP in mitochondria). Enhanced NAD+ levels can support optimal mitochondrial function and improve overall energy metabolism. 
• DNA Repair and Maintenance: NAD+ is essential for DNA repair enzymes, such as poly (ADP-ribose) polymerases (PARPs). Adequate NAD+ levels facilitate efficient DNA repair processes, helping to maintain genomic stability and reduce the risk of mutations and other DNA damage-related issues. 
• Sirtuin Activation: NAD+ is a cofactor for sirtuins, a family of proteins that play a role in regulating cellular processes, including metabolism, stress response, and longevity. Sirtuins are involved in various protective mechanisms, and their activation is associated with improved cellular health and resilience. 
• Anti-Aging Effects: Some studies suggest that maintaining higher NAD+ levels may have anti-aging effects by promoting cellular repair, reducing oxidative stress, and supporting overall cellular function. The activation of sirtuins is often linked to longevity and age-related health benefits. 

• Metabolic Health: Enhanced NAD+ levels may contribute to better metabolic health by improving insulin sensitivity, regulating glucose metabolism, and supporting efficient energy utilization. This can be particularly beneficial for individuals with metabolic disorders or those at risk of developing them. 
• Neurological Protection: NAD+ is involved in neuronal functions and has been implicated in neuroprotection. Some research suggests that maintaining optimal NAD+ levels may help protect against neurodegenerative diseases and age-related cognitive decline. 
• Cardiovascular Health: NAD+ has been linked to cardiovascular health by influencing vascular function and the regulation of blood flow. Studies indicate that NAD+ supplementation may have potential benefits for cardiovascular function and reduce the risk of certain cardiovascular diseases. 
• Exercise Performance: NAD+ plays a role in cellular energy production, and some evidence suggests that maintaining higher NAD+ levels may contribute to improved exercise performance and endurance. 

Conclusion: 

While collagen supplements play a role in addressing visible signs of aging, NAD+ supplements offer a more comprehensive solution by targeting cellular aging at its roots. As science advances, our understanding of the intricacies of skin health deepens, paving the way for innovative approaches to maintaining youthful skin. As with any supplementation, it's essential to consult healthcare professionals to tailor solutions to individual needs. 

NAD+ and Collagen Supplement Synergy: What the Scientific Studies Show

NAD+ precursors like NMN and collagen peptides act on different but complementary parts of skin biology, and there is a scientific rationale for combining them. Collagen peptides (2.5-10 g/day) provide the amino-acid signaling that raises skin elasticity by around 20% and moisture by 28% over 8-12 weeks (Bolke 2019). NMN (250 mg/day) restores the NAD+ pool that fibroblasts need for energy and DNA repair, with a 12-week RCT showing measurable improvements in skin elasticity and hydration (Miyawaki 2023). No head-to-head combined-stack RCT has been published to date, but the mechanistic case for pairing structural-signaling peptides with upstream cellular-energy support is strong. Users can safely stack both.

NMN vs Collagen Peptides for Skin Aging: Head-to-Head

References: 

• Smith-Mungo, L. I., & Kagan, H. M. (1998). Lysyl oxidase: properties, regulation and multiple functions in biology. Matrix Biology, 16(7), 387–398. 
• Cantó, C., Menzies, K. J., & Auwerx, J. (2015). NAD+ metabolism and the control of energy homeostasis: a balancing act between mitochondria and the nucleus. Cell Metabolism, 22(1), 31–53. 
• Verdin, E. (2015). NAD⁺ in aging, metabolism, and neurodegeneration. Science, 350(6265), 1208–1213. 

Is NMN Better Than Collagen for Skin Aging?

Neither is better; they act on different layers of skin biology and work best together. Collagen peptides at 2.5-10 g/day supply structural signaling that raises skin elasticity by around 20% over 8-12 weeks (Bolke 2019). NMN at 250 mg/day restores cellular NAD+ (which fibroblasts need for repair and energy), improving skin elasticity + hydration over the same window in a 12-week RCT of Japanese women. Collagen builds the structural protein directly; NMN keeps the cells that make collagen resilient. Choose based on primary goal: collagen alone for surface elasticity, NMN alone for cellular resilience, both stacked for compound skin outcomes.