Not Just NAD⁺: Discover Complete Cell Health Support with New Longevity.
Free Shipping on US Orders $75+
Shop By Goal
Shop By Category
Best Sellers
Learn
The Women’s Three™: A foundational health protocol developed with Dr. Stacy Sims

The Women’s Three™: A foundational health protocol developed with Dr. Stacy Sims

Shop Now
Promotional Image

Women Are Momentous. Pushing What's Possible with Female Performance

Learn More
New Release
25% Off
NSF Certified for Sport
Momentous Longevity Cellular Health supplement jar with 90 capsules, white label and black lid, photographed against a plain background.
Diagram of Momentous Longevity capsule surrounded by its key ingredients, including Niagen for metabolism and repair, NAC for cell protection, Betaine for cellular stability, PQQ for mitochondrial support, Vitamin C for immune defense, and B vitamins (B3, B9, B12) for metabolism, DNA repair, and brain health.
Momentous Longevity capsule standing upright on a surface with white, red, and orange powders, with text highlighting six proven bioactives for energy, brain health, and DNA repair.
Hand holding three beige supplement capsules against a blue background, with overlay text explaining how to use Momentous Longevity: take 3 capsules once daily in the morning or early afternoon, pairs well with Creatine and Omega-3, and store in a cool, dry place.
Hand holding an open jar of Momentous Longevity capsules with text overlay quoting Dr. Andy Galpin endorsing the product.
Momentous Longevity supplement jar with capsules on a blue surface and text describing clinically validated ingredients such as Niagen and PureQQ, under The Momentous Standard.
Black and white graphic showing supplement facts for Momentous Longevity Cellular Health capsules.
Momentous Longevity Cellular Health supplement jar with 90 capsules, white label and black lid, photographed against a plain background.
Diagram of Momentous Longevity capsule surrounded by its key ingredients, including Niagen for metabolism and repair, NAC for cell protection, Betaine for cellular stability, PQQ for mitochondrial support, Vitamin C for immune defense, and B vitamins (B3, B9, B12) for metabolism, DNA repair, and brain health.
Momentous Longevity capsule standing upright on a surface with white, red, and orange powders, with text highlighting six proven bioactives for energy, brain health, and DNA repair.
Hand holding three beige supplement capsules against a blue background, with overlay text explaining how to use Momentous Longevity: take 3 capsules once daily in the morning or early afternoon, pairs well with Creatine and Omega-3, and store in a cool, dry place.
Hand holding an open jar of Momentous Longevity capsules with text overlay quoting Dr. Andy Galpin endorsing the product.
Momentous Longevity supplement jar with capsules on a blue surface and text describing clinically validated ingredients such as Niagen and PureQQ, under The Momentous Standard.
Black and white graphic showing supplement facts for Momentous Longevity Cellular Health capsules.

Longevity

30 Servings $/Serving

A science-led formula designed to support cellular energy, balance, and long-term resilience.

  • 6 clinically-studied ingredients that work synergistically
  • Targets core cell functions - beyond just NAD⁺
  • Supports healthy metabolism + DNA repair
Estimated to be back in stock:
This flavor is exclusive to certain sizes. Please select another.
1

30 day money back guarantee

Free U.S. shipping over $75

Frequently Purchased Together
Creatine
Creatine 15-Travel Packs

Comprehensive Cellular Support in One Daily Formula

Six clinically studied bioactives: Niagen®, NAC, PureQQ®, Betaine, Vitamin C and B Vitamins to power energy, protect DNA, and support brain and body resilience.

Designed to go beyond NAD⁺ support. Momentous Longevity powers cellular energy, strengthens resilience, supports DNA repair, and promotes long-term performance.


Metabolic Support & Energy

Supports healthy metabolism and maintains natural energy production at the cellular level by fueling mitochondrial ATP creation.

  • How it works: Niagen® (NR) and niacin support NAD⁺ levels, a coenzyme every cell needs to make energy and repair itself, while PQQ supports the creation and maintenance of healthy mitochondria, your cells’ power plants. Together, they keep metabolism running efficiently and cellular energy steady.


Antioxidant Defense & Stress Resilience

Supports a healthy stress response by defending against oxidative stress and helping the body adapt to both physical and emotional stressors.

  • How it works: NAC boosts glutathione, your body’s master antioxidant. Vitamin C helps recycle and sustain it, while PQQ protects mitochondria from oxidative damage. Together, they reduce oxidative stress that can drain NAD⁺ and weaken cells.


DNA Synthesis, Maintenance, & Repair

Supports DNA repair processes and cellular protection to strengthen long-term resilience and promote healthy aging.

  • How it works: Vitamin B9, Vitamin B12, and betaine provide essential methyl groups that support cellular processes involved in DNA stability and repair. Niagen® (NR) and Niacin support NAD⁺ levels, which fuel DNA repair enzymes. Together, they help keep your genetic blueprint protected and functioning properly.

Cellular System Balance (Methylation) Support

Supports balanced methylation, helping keep essential cellular processes—like detoxification, repair, and energy regulation—running efficiently.

  • How it works: Methylation acts as a cellular switchboard—turning processes on and off to regulate detoxification, DNA repair, and energy production. B9, B12, and Betaine provide methyl groups that fuel these reactions, while Niagen® (NR) supports the repair side by maintaining NAD⁺ levels.

Cognitive Support & Brain Health

Supports mental clarity, memory, and focus by driving neuronal energy production and protecting brain cell health—helping support cognitive health with age.

  • How it works: Niagen® (NR) supports NAD⁺ levels to ensure neurons have the energy they need. B vitamins (B3, B9, B12) help maintain neurotransmitter signaling, DNA integrity, and homocysteine balance. PQQ adds an extra layer of mitochondrial support in brain cells to keep them resilient.

This formula works at the cellular level to support energy, resilience, and protection. By supporting NAD⁺ levels (a vital coenzyme for metabolism), it powers your mitochondria, supports natural antioxidant defenses, and helps maintain DNA repair processes. At the same time, it regulates key cellular signaling pathways that keep your body’s processes balanced for resilience, recovery, and long-term health.

1. Nicotinamide Riboside (Niagen®, 500mg)

  • Description: Precursor to NAD⁺, powering metabolism and repair.
  • Benefit: Supports NAD⁺ levels for mitochondrial energy and resilience.
  • Synergy With: Niacin (both raise NAD⁺ pools), PQQ® (mitochondria use NAD⁺ to produce ATP), B9/B12/Betaine (repair and methylation need NAD⁺ + methyl groups).

2. N-Acetyl Cysteine (NAC, 600mg)

  • Description: Antioxidant and glutathione precursor.
  • Benefit: Strengthens defense against oxidative stress.
  • Synergy With: Vitamin C (recycles antioxidants), PQQ® (together lower oxidative stress in mitochondria), Niagen® (oxidative stress depletes NAD⁺, NAC helps preserve it).

3. Betaine (600mg)

  • Description: Provides methyl groups for DNA repair and NAD⁺ synthesis.
  • Benefit: Maintains the methylation pool for cellular balance.
  • Synergy With: Folate + B12 (all work in methylation cycle), Niagen® (DNA repair needs NAD⁺ + methylation).

4. Pyrroloquinoline Quinone Disodium Salt (PureQQ®,20mg)

  • Description: A signaling molecule for mitochondrial production and health as well as an antioxidant. 
  • Benefit: Supports mitochondrial function and biogenesis signaling, which enables more energy production.
  • Synergy With: Niagen® + Niacin (need NAD⁺ to power mitochondria), NAC + Vitamin C (work together as antioxidants to protect mitochondria).

5. Vitamin C (200mg)

  • Description: Antioxidant that recycles glutathione and protects cells.
  • Benefit: Shields cells and supports antioxidant defense.
  • Synergy With: NAC (direct partner in glutathione recycling), PQQ® (complements mitochondrial antioxidant defense), Niagen® (less oxidative stress preserves NAD⁺).

6. B3 – Niacin (28mg)

  • Description: Supports the breakdown of nutrients into NAD⁺, a coenzyme needed by 400+ enzymes.
  • Benefit: Fuels energy production and keeps metabolism running smoothly.
  • Synergy With: Niagen® (NR) (both feed into NAD⁺ production), PQQ® (ensures mitochondria use NAD⁺ efficiently)

7. B9 – Folate (600mcg)

  • Description: Provides methyl groups and guides DNA and cell growth.
  • Benefit: Essential for DNA synthesis and repair.
  • Synergy With: Betaine (TMG) (both supply methyl donors), B12 (partners in methylation cycles), and Niagen® (DNA repair demands NAD⁺ + methylation together)

8. B12 (6mcg)

  • Description: Required for nervous system function, red blood cell formation, and DNA synthesis.
  • Benefit: Supports brain health, nerve signaling, and oxygen delivery.
  • Synergy With: Folate (partners in one-carbon metabolism for DNA repair), Betaine (all provide methyl groups), Niagen® (DNA repair needs both methyl donors + NAD⁺)
  • Take 3x capsules once daily in the morning or early afternoon, when energy demand is higher
  • Aim to take at the same time every day, to maintain consistent levels of key nutrients
  • Those with a sensitive stomach may prefer to take with a meal
  • Store in a cool, dry place for optimal quality

Niagen® (nicotinamide riboside chloride) 500mg

N-Acetyl L-Cysteine (NAC) 600mg

Betaine anhydrous 600mg

Pyrroloquinoline Quinone Disodium Salt (PureQQ®) 20mg

Vitamin C (as ascorbic acid) 200mg

Niacin (Vitamin B3, as niacinamide) 28mg

Folate (Vitamin B9) 600mcg

Vitamin B12 (as methylcobalamin) 6mcg


Other Ingredients: Hypromellose (capsule), Microcrystalline Cellulose, Calcium Silicate, Silica, Magnesium Stearate

When to Use
Take 3 capsules daily in the morning or early afternoon, with or without food.

Onset Time
Noticeable cellular efficiency and focus benefits may appear in 4–6 weeks and full cellular benefits build after 12+ weeks, with ongoing adherence needed for continued benefits over time.

Expected Results
Supports NAD⁺ levels in your cells with clinically studied Niagen® to power mitochondrial energy production, support DNA repair, and protect brain health. PQQ® drives new mitochondrial growth and resilience, while NAC and Vitamin C reinforce antioxidant defenses to preserve both NAD⁺ and cellular integrity. Betaine, Folate, and B12 supply essential methyl groups for DNA repair and methylation balance, ensuring your cells maintain optimal function. Together with Niacin, this synergistic blend amplifies metabolism, sharpens cognition, strengthens stress resilience, and promotes healthier aging.

Each ingredient has been studied in clinical trials and Longevity delivers them in researched doses and bioavailable forms, not just trace amounts. 


There are 23 credible reviews and studies related to this product:


Nicotinamide Riboside (NR):

  1. Nicotinamide Riboside, a Promising Vitamin B3 Derivative for Healthy Aging and Longevity: Current Research and Perspectives
  2. Nicotinamide Riboside—The Current State of Research and Therapeutic Uses
  3. Chronic nicotinamide riboside supplementation is well-tolerated and elevates NAD+ in healthy middle-aged and older adults
  4. The NAD+ precursor nicotinamide riboside enhances oxidative metabolism and protects against high-fat diet induced obesity

NAC:

  1. N-Acetylcysteine (NAC): Impacts on Human Health
  2. N-acetylcysteine - a safe antidote for cysteine/glutathione deficiency
  3. The beneficial effects of N-acetyl cysteine (NAC) against obesity associated complications: A systematic review of pre-clinical studies
  4. The mechanism of action of N-acetylcysteine (NAC): The emerging role of H2S and sulfane sulfur species
  5. N-Acetyl Cysteine Functions as a Fast-Acting Antioxidant by Triggering Intracellular H2S and Sulfane Sulfur Production

Betaine:

  1. Beneficial Effects of Betaine: A Comprehensive Review
  2. Betaine Suppresses Proinflammatory Signaling During Aging: The Involvement of Nuclear Factor-κB via Nuclear Factor-Inducing Kinase/IκB Kinase and Mitogen-Activated Protein Kinases
  3. Effects of betaine supplementation on cardiovascular markers: A systematic review and Meta-analysis
  4. Making the case for prophylactic use of betaine to promote brain health in young (15–24 year old) athletes at risk for concussion
  5. Low dose betaine supplementation leads to immediate and long term lowering of plasma homocysteine in healthy men and women.
  6. Betaine is a positive regulator of mitochondrial respiration

Pyrroloquinoline-Quinone (PQQ):

  1. Pyrroloquinoline Quinone (PQQ): Its impact on human health and potential benefits: PQQ: Human health impacts and benefits
  2. Pyrroloquinoline quinone (PQQ) protects mitochondrial function of HEI-OC1 cells under premature senescence
  3. Effects of Pyrroloquinoline Quinone (PQQ) Supplementation on Aerobic Exercise Performance and Indices of Mitochondrial Biogenesis in Untrained Men

Vitamin C:

  1. Vitamin C: Fact Sheet for Health Professionals
  2. Synergistic Protection of N-Acetylcysteine and Ascorbic Acid 2-Phosphate on Human Mesenchymal Stem cells Against Mitoptosis, Necroptosis and Apoptosis
  3. Dose-dependent vitamin C uptake and radical scavenging activity in human skin measured with in vivo electron paramagnetic resonance spectroscopy

B Vitamins (Niacin B3, Folate B9, Methylcobalamin B12):

  1. Dietary Intervention Modifies DNA Methylation Age Assessed by the Epigenetic Clock
  2. Prospective study of telomere length and LINE-1 methylation in peripheral blood cells: the role of B vitamins supplementation

Build Your Stack

Frequently Asked Questions

Unlike single-ingredient products, Longevity combines Niagen® with five additional clinically-validated ingredients that work synergistically to support cellular energy, repair, antioxidant defense, and stress resilience. This makes it a more complete daily solution for cellular health.


When it comes to NAD⁺ supplementation, it is important to have the right format. We have chosen Niagen intentionally as an NAD⁺ precursor. This is because NAD⁺ itself is too large to be efficiently absorbed, whereas Niagen® (nicotinamide riboside, or NR) is a smaller molecule, more bioavailable, and supports the body’s natural NAD⁺ production as a precursor with fewer risks or unwanted side effects that may come with direct NAD supplementation alone.

Niagen® is a patented, clinically studied form of Vitamin B3 shown to support NAD⁺ levels, which are critical for cellular energy, DNA repair, and healthy aging. It’s the foundation of Longevity’s formula.

While Niagen® supports NAD⁺, cellular health requires multiple pathways. NAC, Betaine, PQQ, Vitamin C, and B vitamins amplify Niagen®’s effects and support antioxidant defense, methylation, mitochondrial energy, and stress resilience, offering more than Niagen® alone.

Longevity provides an all-in-one approach to healthy aging by supporting NAD⁺ and mitochondrial function, while Ubiquinol focuses specifically on efficient energy production. Resveratrol adds additional benefits through sirtuin activation, making it a smart option to stack alongside Longevity and Ubiquinol for a more well-rounded approach to long-term performance

Multivitamins cover basic nutrition gaps. Longevity goes deeper, targeting the cellular processes of energy, repair, and resilience with specialized, clinically-validated ingredients not found in most multis.

Cellular health is an ongoing process. For best results, Longevity is designed for daily use, long-term, helping you maintain energy and resilience over decades.

Yes. Longevity is vegan, GMO-free, and made without common allergens like gluten, dairy, or soy.

Longevity contains N-Acetyl Cysteine (NAC), a clinically studied amino acid derivative that naturally contains sulfur. When NAC is exposed to even a small amount of air or moisture, it can release tiny amounts of sulfur compounds, the same ones that create a “rotten egg” smell.

While the odor may be strong, it is completely normal and harmless. It doesn’t mean the product has gone bad or lost potency. In fact, the smell is a sign you’re getting the real, clinically effective ingredient.

As long as your product is within its expiration date and stored properly, it is safe and effective to take.

Tip: To minimize the smell, close the cap tightly and store the bottle in a cool, dry place.

Yes. It’s NSF Certified for Sport®, which means it has been independently tested for banned substances and is trusted by professional sports teams and Olympians.