Anti-Aging

NAD+ vs Glutathione: Comparing Anti-Aging Injection Therapies

NAD+ (nicotinamide adenine dinucleotide) and glutathione are two of the most researched molecules in longevity science. Both decline naturally with age, contributing to the cellular deterioration we experience as aging. They work through entirely different mechanisms, however, and understanding those differences is key to choosing the right therapy -- or deciding to use both.

NAD+ is a coenzyme present in every cell of the body. It is essential for mitochondrial energy production, DNA repair, and the activity of sirtuins -- a family of proteins linked to longevity and cellular resilience. By the time you reach your 50s, NAD+ levels have typically declined by 50% or more. NAD+ injection therapy aims to restore these levels, with patients commonly reporting improved mental clarity, sustained energy, and better sleep quality.

Glutathione is the body's most abundant endogenous antioxidant, often called the "master antioxidant." It is critical for neutralizing free radicals, detoxifying harmful compounds in the liver, supporting immune function, and reducing oxidative stress. Glutathione injection therapy bypasses the digestive system (which degrades oral glutathione) to deliver the molecule directly into the bloodstream, where it can reach effective concentrations.

NAD+ Injection

From $179/mo

NAD+ injection delivers nicotinamide adenine dinucleotide directly into the bloodstream, bypassing oral degradation. NAD+ fuels mitochondrial energy production (ATP synthesis), activates sirtuin proteins involved in DNA repair and cellular longevity, and supports over 500 enzymatic reactions in the body.

Best for

Individuals experiencing mental fog, low energy, or age-related cognitive decline. Also sought by those focused on cellular longevity, recovery from substance use, or athletic performance optimization.

Advantages

  • Supports mitochondrial energy production at the cellular level
  • Activates sirtuin pathways linked to DNA repair and longevity
  • Patients report improved mental clarity and focus
  • May improve sleep quality and reduce brain fog
  • Supports over 500 enzymatic reactions in the body

Considerations

  • Higher cost than glutathione therapy
  • Can cause flushing, nausea, or discomfort during infusion
  • Requires ongoing treatments to maintain benefits
  • Research on long-term supplementation outcomes is still evolving
View NAD+ Injection Details

Glutathione Injection

From $119/mo

Glutathione injection delivers the body's master antioxidant directly into the bloodstream. Glutathione neutralizes free radicals and reactive oxygen species, supports Phase II liver detoxification, recycles other antioxidants (vitamins C and E), and plays a central role in immune cell function and inflammatory response regulation.

Best for

Individuals dealing with oxidative stress, environmental toxin exposure, skin concerns (hyperpigmentation, dull complexion), immune system support, or general detoxification goals. Also popular among those seeking skin brightening effects.

Advantages

  • Most powerful endogenous antioxidant -- neutralizes free radicals directly
  • Supports liver detoxification and Phase II conjugation pathways
  • Recycles vitamins C and E for sustained antioxidant defense
  • Skin brightening and complexion improvement commonly reported
  • Supports immune cell function and inflammatory regulation

Considerations

  • Benefits can be subtle and gradual rather than immediately noticeable
  • Requires injection (oral glutathione has poor bioavailability)
  • Skin brightening effects require consistent, long-term use
  • Less robust clinical trial data than pharmaceutical medications
View Glutathione Injection Details

Head-to-Head Comparison

Type

NAD+ Injection

Coenzyme / cofactor

Glutathione Injection

Tripeptide antioxidant

Primary function

NAD+ Injection

Cellular energy production and DNA repair

Glutathione Injection

Antioxidant defense and detoxification

How taken

NAD+ Injection

Subcutaneous or intramuscular injection

Glutathione Injection

Subcutaneous or intramuscular injection

Key pathways

NAD+ Injection

Mitochondria (ATP), sirtuins, 500+ enzymes

Glutathione Injection

Free radical scavenging, liver Phase II, immune cells

Onset of noticeable effects

NAD+ Injection

Days to weeks (energy, focus)

Glutathione Injection

Weeks to months (gradual detox, skin changes)

Most noticeable benefit

NAD+ Injection

Mental clarity and sustained energy

Glutathione Injection

Skin quality and reduced oxidative stress symptoms

Age-related decline

NAD+ Injection

~50% reduction by age 50

Glutathione Injection

Significant decline with age, accelerated by toxin exposure

Prescription required

NAD+ Injection

Yes (physician-supervised)

Glutathione Injection

Yes (physician-supervised)

Can be combined

NAD+ Injection

Yes -- complementary mechanisms

Glutathione Injection

Yes -- complementary mechanisms

Common side effects

NAD+ Injection

Flushing, nausea, injection site discomfort

Glutathione Injection

Injection site discomfort, rare GI upset

Starting price at INA

NAD+ Injection

$179/mo

Glutathione Injection

$119/mo

Best for

NAD+ Injection

Energy, cognition, cellular repair

Glutathione Injection

Detox, skin, immune support, antioxidant defense

Which Should You Choose?

NAD+ and glutathione address different aspects of cellular aging, and for many patients, the ideal approach is to use both. If you need to choose one, consider what you are trying to address.

If your primary concerns are low energy, brain fog, cognitive decline, or you want to support cellular repair and longevity pathways directly, NAD+ is the more targeted choice. If you are focused on detoxification, reducing oxidative stress, supporting immune health, or improving skin quality, glutathione provides more relevant benefits. Both molecules decline with age, and both play non-overlapping roles in keeping cells functioning optimally. Many anti-aging protocols include both therapies on alternating schedules.

Frequently Asked Questions

Can I take NAD+ and glutathione together?
Yes. They work through completely different pathways and are considered complementary. NAD+ supports energy production and DNA repair while glutathione handles antioxidant defense and detoxification. Many longevity-focused protocols alternate or combine both therapies.
Why inject NAD+ and glutathione instead of taking oral supplements?
Both NAD+ and glutathione have very poor oral bioavailability. NAD+ is broken down in the gut before reaching the bloodstream. Oral glutathione is degraded by digestive enzymes, with only a small fraction reaching circulation. Injection bypasses the digestive system entirely, delivering these molecules directly where they can be used.
How quickly will I notice effects from NAD+ injections?
Many patients report improved mental clarity and energy within the first few days to weeks of starting NAD+ therapy. The timeline varies by individual, and benefits often become more pronounced with consistent, ongoing treatment.
Does glutathione actually brighten skin?
Glutathione has been studied for its effects on skin pigmentation. It may inhibit melanin production by interfering with the tyrosinase enzyme, leading to a brighter, more even complexion over time. Results vary and typically require consistent use over several months.
Are there side effects from NAD+ or glutathione injections?
NAD+ injections can cause flushing, nausea, or a warm sensation during administration, particularly with higher doses or faster infusion rates. These effects are temporary. Glutathione injections are generally well-tolerated with minimal side effects beyond occasional injection site discomfort.
How often do I need these injections?
Protocols vary. NAD+ is commonly administered 1-3 times per week during an initial loading phase, then reduced to 1-2 times per week for maintenance. Glutathione is typically administered 1-2 times per week. Your provider will customize the schedule based on your goals and response.

Not sure which is right for you?

Take our free medical assessment and a licensed provider will recommend the best treatment for your specific health profile and goals.

Start Your Assessment

Warning: Compounded GLP-1s (Tirzepatide & Semaglutide)

Please contact your doctor ASAP and seek in-person care immediately if a side effect becomes problematic or you experience:

  • Severe nausea and/or vomiting resulting in dehydration - it is important to stay well hydrated and drink plenty of fluids while on this medication. Kidney problems/kidney failure - vomiting, nausea, diarrhea can cause dehydration and kidney issues and make kidney problems worse in individuals who have pre-existing kidney conditions; may sometimes lead to the need for hemodialysis.
  • Thyroid C-Cell Tumor: Trouble swallowing, hoarseness, a lump or swelling in your neck, or shortness of breath (see black box warning below).
  • Pancreatitis: Severe pain in your abdomen or back that will not go away.
  • Acute gallbladder disease: Pain in the middle or right upper stomach, fever, white parts of your eyes turn yellow or skin turns yellow, nausea/vomiting.
  • Hepatitis: Elevated liver enzymes/Jaundice.
  • Diabetic retinopathy problems: Changes in vision in those with type II diabetes, particularly vision problems may worsen in those with a history of diabetic retinopathy.
  • Severe gastrointestinal disease: may cause gastrointestinal disease; do not use if you have a history of severe gastrointestinal disease.
From $155/mo*Weight Loss
Get Started