RetzlerRx® S-Acetyl Glutathione ULTRA

S-Acetyl Glutathione ULTRA with NAC – Advanced Glutathione & Antioxidant Support*

S-Acetyl Glutathione ULTRA is a practitioner-grade formula designed to support one of the body’s most important endogenous antioxidant systems: glutathione.* It combines stabilized S-acetyl glutathione with 1000 mg of N-acetyl cysteine (NAC), providing both glutathione itself and a key precursor the body can use for its own glutathione production.*

This dual approach makes S-Acetyl Glutathione ULTRA a useful option for people looking for broader support for antioxidant defenses, cellular resilience, healthy detoxification pathways, and glutathione status.*

Why Glutathione Matters

Glutathione is a naturally occurring antioxidant produced throughout the body and found in especially high concentrations in the liver. It participates in cellular redox balance, antioxidant enzyme systems, normal detoxification processes, and cellular protection from oxidative stress.*

The body can make glutathione from the amino acids glutamate, glycine, and cysteine. Of these, cysteine availability can become an important limiting factor in glutathione synthesis. That is one reason N-acetyl cysteine is frequently paired with glutathione in antioxidant formulas.*

Key Features and How It Works

• S-Acetyl Glutathione (S-A-GSH) – An acetylated, stabilized form of glutathione designed to improve stability and support effective glutathione delivery.* Rather than relying exclusively on the body to manufacture glutathione from precursor nutrients, the formula provides glutathione directly.*
• N-Acetyl Cysteine (NAC) – 1000 mg per serving – NAC provides cysteine, an important substrate used by the body to synthesize glutathione.* This provides complementary support for endogenous glutathione production rather than relying on supplemental glutathione alone.*
• Vitamin B6 – Supports normal amino acid metabolism and biochemical pathways involved in cellular metabolism and antioxidant function.*

Why Combine S-Acetyl Glutathione and NAC?

Glutathione and NAC do not do exactly the same thing. Supplemental S-acetyl glutathione provides a stabilized form of glutathione, while NAC supplies cysteine that the body can use to produce glutathione through its own metabolic pathways.*

Combining the two provides a broader strategy: provide glutathione while also supporting the body’s capacity to make it.*

Product Benefits

• Comprehensive Glutathione Support* – Combines stabilized glutathione with NAC to support both glutathione availability and endogenous glutathione production.*
• Supports Antioxidant Defense* – Glutathione is an important component of the body’s natural antioxidant defense systems and helps maintain healthy cellular redox balance.*
• Supports Healthy Detoxification Pathways* – Glutathione participates in normal hepatic and cellular processes involved in the metabolism and elimination of certain compounds.*
• Supports Cellular Resilience* – Healthy glutathione status helps support normal cellular defenses during exposure to oxidative stress.*
• Supports Normal Immune Function* – Glutathione participates in normal immune-cell function and cellular signaling.*

Important Note About NAC Odor

If you open the bottle and notice a sulfur-like smell, that does not necessarily mean anything is wrong with the product.

N-acetyl cysteine naturally contains sulfur. NAC-containing supplements can therefore have a noticeable sulfur-like odor, sometimes described as similar to eggs. The intensity can vary from bottle to bottle and may become more noticeable after the container has been opened.

This characteristic odor is normal for NAC and, by itself, does not indicate that the supplement is spoiled or expired.

Why Buy RetzlerRx® Supplements?

RetzlerRx® supplements are offered through HormoneSynergy® Longevity Medicine, a physician-directed practice focused on evidence-based preventive longevity medicine.

We do not believe supplements should replace the fundamentals of good medicine. Our recommendations are selected for quality, formulation, bioavailability, and clinical relevance and are intended to complement a broader health strategy that may include nutrition, exercise, restorative sleep, metabolic health, hormone evaluation, appropriate diagnostic testing, and medical care.

Frequently Asked Questions

What is S-acetyl glutathione?

S-acetyl glutathione is an acetylated, stabilized form of glutathione designed to improve stability and support effective glutathione delivery.*

Why not just take NAC?

NAC and glutathione provide complementary nutritional support.* NAC supplies cysteine that the body can use to manufacture glutathione, while S-acetyl glutathione provides glutathione directly in a stabilized form.* This formula uses both approaches.

Why does this formula contain 1000 mg of NAC?

NAC is a well-established source of cysteine, one of the amino acids required for glutathione synthesis.* Providing NAC alongside S-acetyl glutathione helps support the body’s own glutathione-producing pathways in addition to providing supplemental glutathione.*

Is NAC itself an antioxidant?

NAC is commonly described as an antioxidant, but much of its antioxidant activity is related to its ability to provide cysteine for glutathione synthesis and support cellular redox systems.* It should not simply be thought of as a direct free-radical scavenger in every biological setting.

Why does NAC sometimes smell like sulfur?

NAC is a sulfur-containing compound and can naturally produce a noticeable sulfur-like odor. This is common with NAC-containing supplements and does not, by itself, indicate that the product has spoiled.

What does glutathione support in the body?

Glutathione supports normal antioxidant defenses, cellular redox balance, detoxification pathways, immune function, and cellular protection from oxidative stress.*

Is glutathione only important for the liver?

No. The liver has particularly high glutathione requirements, but glutathione is present throughout the body and participates in antioxidant and cellular defense systems in many tissues.*