NAD+ or Glutathione: Differences Between Therapies

At IMAGE REGENERATIVE, we accompany people every day who desire more energy, more luminous skin, and support to counteract the signs of cellular aging.

Among the most frequent questions is the comparison between two well-known protocols of longevity medicine: intravenous therapy with NAD+ and Glutathione Detox treatment.

Both act at the cellular level, but with different objectives. The first supports energy production and DNA repair, while the second is the great antioxidant and detoxifying ally of the organism.

At our locations in Milano and St. Moritz, we offer these IV therapies within personalized pathways. In this article, we examine what they are for, the main differences, and how to understand which therapy is right for you.

What NAD+ and glutathione are

To navigate between the two therapies, it is helpful to start with the molecules. NAD+, or nicotinamide adenine dinucleotide, is a coenzyme present in all cells of the organism.

It participates in energy production in mitochondria, DNA repair, and activation of sirtuins, a group of proteins involved in regulating cellular aging. As years pass, NAD+ levels tend to decrease, and with them the ability of cells to regenerate. This explains why, as age advances, energy and recovery capacity tend to diminish.

Glutathione is a powerful natural antioxidant, formed by three amino acids: cysteine, glycine, and glutamic acid. It is one of the most important endogenous antioxidants because it neutralizes free radicals, supports the liver in detoxification, and contributes to proper immune system function. Its concentration also decreases with age, oxidative stress, and exposure to pollutants and toxins.

In summary, NAD+ works primarily on energy and regeneration, while glutathione acts as an antioxidant and detoxifying shield.

NAD+ (nicotinamide): what it is for and benefits

NAD+ therapy, also indicated as NAD IV therapy or intravenous NAD, aims to restore optimal levels of this coenzyme when the organism shows chronic fatigue, decreased concentration, or slowed recovery. By reactivating sirtuins and supporting mitochondrial function, NAD+ promotes greater cellular energy production and supports natural DNA repair processes.

Among the most appreciated benefits are improved mental clarity, support for memory and concentration, faster physical recovery after intense periods, and better resistance to fatigue. For this reason, nicotinamide adenine dinucleotide is indicated for those who live hectic rhythms, for athletes, and for those who desire a preventive approach to aging.

Those who want to deepen the connection between this molecule and well-being can read our in-depth analysis on the role of NAD in longevity. Each protocol is calibrated by the medical team based on individual objectives.

Glutathione: what it is for, for detox and skin

Glutathione administered intravenously rapidly reaches tissues and supports the organism on two fronts: detoxification and antioxidant protection. At the hepatic level, it assists the liver in its purifying processes, promoting the elimination of toxins and heavy metals accumulated through environmental exposure.

At the systemic level, it neutralizes free radicals responsible for oxidative stress, one of the factors that accelerate cellular aging.

On the aesthetic level, this antioxidant is highly requested for its effect on the skin. It contributes to a more uniform and luminous complexion, helps reduce skin spots, and supports tissue elasticity, also intervening in melanin regulation. Added to this is support for the immune system, useful during periods of fatigue or after phases of prolonged stress.

Many people request it during seasonal changes, before an important event, or when returning from demanding periods, when the skin appears dull and the organism fatigued. Included in a Longevity protocol and administered in a medical setting, intravenous glutathione is an appreciated choice for those seeking vitality and healthier-looking skin.

NAD+ or glutathione: the main differences

Although both are protagonists of regenerative medicine, NAD+ and glutathione respond to different needs. NAD+ is the molecule of energy and regeneration: it acts on mitochondria, sirtuins, and cellular repair, ideal when the goal is to regain vitality, clarity, and recovery capacity.

Glutathione is the molecule of purification and antioxidant protection: it works on the liver, free radicals, and skin appearance, indicated when the aim is to detoxify the organism and visibly improve luminosity and complexion uniformity. The table summarizes the main differences.

Supplement or intravenous therapy: forms of intake

Both NAD+ and glutathione exist as oral supplements and as intravenous therapy, with different efficacy. Supplements in capsules or tablets are convenient for daily maintenance use, but must pass through the digestive system.

This reduces the amount of active ingredient that reaches the cells, a particularly evident limitation for glutathione, whose oral bioavailability is rather low. For NAD+, precursors such as nicotinamide are often used to support endogenous levels over time.

Intravenous therapy, or IV therapy, introduces the molecule directly into the bloodstream and ensures complete and immediate absorption, with generally faster effects. At IMAGE REGENERATIVE, infusions are performed in a medical environment and under supervision, often complementarily: many patients alternate targeted intravenous cycles with a maintenance phase using personalized oral supplementation.

Side effects and contraindications

Both therapies have a good safety profile when performed in a specialized facility and under medical supervision. Side effects are generally mild and transient.

With NAD+, if the infusion proceeds too quickly, temporary sensations such as nausea, chest tightness, or flushing may appear. For this reason, at IMAGE REGENERATIVE centers, our physicians regulate the infusion to ensure slow, safe, and comfortable administration. With glutathione, adverse effects are rare and mostly related to the infusion site.

Some contraindications remain to be evaluated case by case. Pregnancy, breastfeeding, certain kidney or liver conditions, and the use of specific medications require particular attention. For NAD+ therapy, a reported ECG is required before starting the cycle. The first step is therefore always a thorough medical evaluation, during which the team collects the medical history and verifies suitability for treatment, in order to proceed safely.

Which therapy to choose based on objectives

The choice between NAD+ and glutathione depends on personal objectives. Those who wish to counteract fatigue, regain energy and clarity, or support physical recovery find NAD+ to be the most suitable ally. Those aiming to detoxify the organism, strengthen defenses, and visibly improve skin luminosity orient toward glutathione. In many cases, the two therapies complement each other: a Longevity pathway can combine them at different phases, integrating other regenerative IV therapies as needed. The objective remains the same: to accompany the organism toward better balance with a gradual and measured approach.

The answer varies from person to person, because each organism has its own history and balance. For this reason, the best path remains a specialized consultation, during which objectives, timing, and the most suitable protocol are defined together. The longevity medicine team at IMAGE REGENERATIVE is available to build a customized pathway, oriented toward long-term wellness and prevention.

Frequently asked questions

NAD+ or glutathione, which is better?

It depends on the objective. NAD+ is more suitable for increasing energy, mental clarity, and recovery capacity, because it acts on mitochondria and cellular repair. Glutathione is preferable for detoxifying the organism, supporting the liver, and improving skin luminosity thanks to its antioxidant action. They are often used together within a personalized pathway.

Can NAD+ and glutathione be done together?

Yes. The two molecules have complementary functions and can be part of the same Longevity pathway, in separate sessions or successive phases. The combination is always evaluated by the physician based on health status and individual objectives.

How many sessions are needed to see benefits?

Indicatively, an initial cycle of 3-4 weekly infusions is recommended for NAD+ and a cycle of 4-6 total infusions for glutathione, followed by a maintenance phase. The frequency is then personalized after medical evaluation.

Is the supplement or intravenous therapy better?

The oral supplement is convenient for maintenance, but has reduced bioavailability, especially for glutathione. Intravenous therapy ensures complete and immediate absorption, with generally faster effects. The two forms are often combined to optimize results over time.