What Does NAD+ Do in Our Body?

Nicotinamide Adenine Dinucleotide (NAD+).

NAD+ functions as a fundamental coenzyme present in every living cell. It drives the metabolic reactions that convert nutrients into energy and regulates cellular processes associated with aging, DNA repair, and skin regeneration. As research into anti-aging treatments, cellular rejuvenation, and metabolic health expands, scientists increasingly recognize NAD+ as a central regulator of biological vitality.

However, NAD+ levels naturally decline with age. This reduction affects energy production, cellular repair mechanisms, and the activation of longevity-associated proteins. As a result, the scientific and aesthetic communities have begun exploring ways to support NAD+ production within the body, particularly through precursors such as NMN (Nicotinamide Mononucleotide).

This blog explores the biological role of NAD+, its connection to aging, skin health, and cellular metabolism, and how advanced formulations such as Lapiena NMN+ combine regenerative ingredients to enhance skin vitality and aesthetic outcomes.

Understanding NAD+ The Cellular Energy Molecule

NAD+ is a coenzyme involved in redox reactions, meaning it assists in transferring electrons during metabolic processes. These reactions allow cells to transform nutrients into usable energy.

At the most fundamental level, NAD+ supports the production of adenosine triphosphate (ATP), the molecule that supplies energy to nearly every cellular process in the body.

Cells rely on ATP to perform functions such as:

• DNA repair
• protein synthesis
• cell regeneration
• metabolic regulation
• tissue repair and renewal

Without sufficient NAD+, the cellular machinery responsible for generating ATP cannot function effectively. Because of this relationship, NAD+ plays a critical role in maintaining cellular vitality, metabolic efficiency, and tissue health.

NAD+ and ATP The Foundation of Cellular Energy

ATP is widely known as the energy currency of biological systems. Every living organism depends on ATP to maintain life processes.

Within the mitochondria, NAD+ participates in metabolic pathways such as glycolysis, the citric acid cycle, and oxidative phosphorylation. During these processes, NAD+ accepts electrons and converts into its reduced form, NADH. This transfer of electrons fuels the biochemical reactions that ultimately generate ATP.

Without adequate NAD+ availability, mitochondrial function becomes compromised. Consequently, cells produce less energy, which can impair vital biological functions.

In tissues with high metabolic demands, such as skin, muscle, and neural tissue, decreased energy production can accelerate functional decline and visible signs of aging.

NAD+ and the Biology of Aging The Role of Sirtuins

Beyond energy metabolism, NAD+ serves another essential function: activating sirtuins, a family of proteins closely associated with longevity and cellular health.

Humans possess 7 known sirtuin proteins (SIRT1–SIRT7). These proteins regulate biological pathways linked to:

• DNA repair
• Inflammation control
• Mitochondrial health
• Metabolic balance
• Cellular stress resistance

Under normal conditions, sirtuins remain relatively inactive. NAD+ functions as a molecular switch that activates these proteins. When NAD+ binds to sirtuins, it enables them to perform their regulatory functions within the cell. This relationship between NAD+ and sirtuins forms a central concept in longevity research and anti-aging science.

Research suggests that declining NAD+ levels disrupt this activation process. As NAD+ decreases with age, sirtuin activity also declines, which may contribute to:

• Reduced tissue regeneration
• Mitochondrial dysfunction
• Increased oxidative stress
• Visible signs of skin aging

Reference: Imai, S., & Guarente, L. (2016). “It Takes Two to Tango: NAD+ and Sirtuins in Aging/Longevity Control.” npj Aging and Mechanisms of Disease.

Why NAD+ Declines With Age

Several biological mechanisms contribute to declining NAD+ levels over time. These include:

1. Increased metabolic demand - Cells consume NAD+ continuously during energy production and DNA repair.

2. Enzyme activity associated with aging - Certain enzymes that degrade NAD+ become more active with age.

3. Reduced synthesis capacity - The body gradually becomes less efficient at producing NAD+ from dietary nutrients.

Because of these factors, NAD+ levels may decrease significantly during adulthood and later life. This reduction may affect metabolic health, cognitive function, and skin regeneration, making NAD+ restoration an area of growing interest in aesthetic medicine.

Why NMN Is Used Instead of NAD+

Although NAD+ plays an essential biological role, direct supplementation with NAD+ presents a limitation, the molecule does not easily enter cells when consumed externally.

For this reason, researchers have focused on NAD+ precursors, compounds that the body can convert into NAD+ internally.

One of the most studied precursors is Nicotinamide Mononucleotide (NMN). NMN participates directly in the NAD+ biosynthesis pathway and can enter cells more efficiently than NAD+ itself. Once inside the cell, NMN converts into NAD+, thereby restoring the molecule required for metabolic and longevity-related functions.

This approach has generated increasing interest in nutritional science, regenerative medicine, and aesthetic dermatology.

The Role of NAD+ in Skin Health and Aesthetic Medicine

Skin is one of the most metabolically active organs in the body. Keratinocytes, fibroblasts, and other skin cells require significant energy to maintain functions such as:

• Collagen production
• Elastin synthesis
• Barrier repair
• Cell turnover

When cellular energy declines, these processes slow down. As a result, the skin may begin to show common signs of aging including:

• Fine lines and wrinkles
• Reduced elasticity
• Uneven texture
• Dull complexion

By supporting NAD+ production through NMN and other complementary molecules, researchers aim to restore cellular metabolism and regenerative capacity within the skin.

What Makes Lapiena NMN+ Unique?

Lapiena NMN+ integrates several scientifically studied compounds that support energy metabolism, collagen synthesis, and skin barrier recovery.

Niacinamide is a water-soluble form of vitamin B3 widely used in dermatology and cosmetic science. Importantly, it also functions as a precursor in the NAD+ biosynthesis pathway.

This dual role allows niacinamide to support both cellular metabolism and skin health.

Clinically recognised benefits include:

• Reduction of melanin transfer for brighter skin tone
• Improvement in skin barrier integrity through ceramide production
• Reduction of redness and inflammation
• Regulation of sebum production
• Improvement in skin elasticity and pore appearance

When combined with NMN, niacinamide enhances intracellular NAD+ production, increasing the energy available for skin cell repair and regeneration.

Adenosine Supports Cellular Energy and Collagen Production

Adenosine is a naturally occurring molecule present in all living cells and forms a structural component of ATP, the body’s energy molecule.

Within dermatological applications, adenosine contributes to:

• Stimulation of collagen and elastin synthesis
• Improvement in skin firmness
• Reduction of fine lines and wrinkles
• Enhancement of skin texture and elasticity

When NMN increases NAD+ levels, cellular energy availability also rises. This energy supports the collagen-stimulating activity of adenosine, amplifying its anti-aging effects.

PDRN Regenerative DNA Technology

Polydeoxyribonucleotide (PDRN) is a biologically active DNA fragment commonly derived from purified salmon DNA. It has gained widespread use in medical aesthetics and regenerative dermatology.

PDRN supports tissue repair by stimulating fibroblast activity, the cells responsible for producing collagen and elastin.

Clinical benefits include:

• Accelerated wound healing
• Reduction of inflammation and redness
• Improvement in skin thickness and elasticity
• Reduction of scarring and tissue damage

When paired with NMN, PDRN’s regenerative capacity may increase because enhanced NAD+ levels support DNA repair pathways and cellular metabolism.

Panthenol Strengthening the Skin Barrier

Panthenol, also known as provitamin B5, converts into pantothenic acid once absorbed into the skin.

It plays an essential role in maintaining skin hydration and barrier integrity.

Dermatological benefits include:

• Deep skin hydration
• Reinforcement of lipid barrier function
• Reduction of irritation and inflammation
• Accelerated recovery after aesthetic procedures

In combination with NMN, panthenol provides surface barrier repair, while NMN supports cellular recovery from within. Together, they create a dual-level approach to skin rejuvenation.

The Future of NAD+ in Aesthetic Science

Interest in NAD+ continues to expand across multiple fields, including longevity research, regenerative medicine, and aesthetic dermatology. Scientists increasingly recognise that maintaining healthy NAD+ levels supports essential biological processes related to energy production, DNA repair, and cellular resilience.

By leveraging NAD+ precursors such as NMN alongside regenerative compounds like niacinamide, adenosine, PDRN, and panthenol, modern formulations aim to enhance the skin’s natural capacity for repair, renewal, and visible rejuvenation.

As research progresses, NAD+ metabolism may become one of the most significant biological pathways informing future developments in anti-aging therapies and advanced skincare technologies.