Doctor Life Glutathione + N-A-C — 60 capsules

Pack size: 60 capsules

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Doctor Life

Glutathione + N-A-C

500 mg GSH + NAC

121,99 zł

Supports daily antioxidant balance and cellular protection
Supports glutathione stores during periods of increased demand
For active people who want to support cellular health

Overview

A complementary approach to the body's glutathione system. Reduced glutathione (GSH) is a tripeptide made from glutamate, cysteine, and glycine, and a key part of intracellular oxidation-reduction balance. It helps neutralize reactive oxygen species, supports glutathione enzyme activity, and helps regenerate other components of the antioxidant system.

At the heart of the formula / Glutathione + N-A-C

Thoughtful support. Clear purpose.

01Supports daily antioxidant balance and cellular protection
02Supports glutathione stores during periods of increased demand
03For active people who want to support cellular health
04Complements a routine focused on healthy aging and long-term well-being
05Supports the body’s natural defenses against oxidative stress

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Glutathione + N-A-C

Made for your daily routine.

N-acetylcysteine (NAC) is a stable derivative of cysteine, one of the building blocks needed to make glutathione. Cysteine availability can limit that process. This formula combines reduced glutathione with NAC, bringing the finished molecule and a precursor together.

We use reduced L-glutathione (GSH), rather than oxidized glutathione (GSSG). Some clinical studies have found increased glutathione levels with regular oral supplementation, although results vary with dose, duration, and formulation. NAC provides cysteine used in the body’s own glutathione production.

The formula uses a plant-based DRcaps® capsule made from hydroxypropyl methylcellulose and gellan gum. The label also states GMP manufacturing and protective-atmosphere packaging intended to limit oxygen exposure.

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Glutathione + N-A-C

Why do glutathione and NAC matter?

Glutathione is part of the cell’s antioxidant and redox systems. Its reduced form, GSH, takes part in reactions involving reactive compounds and can become oxidized GSSG. The body makes glutathione from glutamate, glycine, and cysteine. NAC supplies a cysteine precursor, while GSH provides reduced glutathione directly.

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Glutathione + N-A-C

What does the research say about Glutathione + N-A-C?

A longer-term randomized trial found that oral GSH increased glutathione levels in blood and selected cells, with effects varying by dose and duration. Another trial studied 500 mg daily, while a meta-analysis of NAC trials reported changes in glutathione and antioxidant measures. These ingredient studies inform the formula; they do not establish the effects of this specific combination.

Ingredients / Doctor Life

Every ingredient. Clearly explained.

Each ingredient, its form and quantity — in one place.

Ingredient amounts for the servings shown in the table.
Ingredient	1 capsule
Reduced L-glutathione (GSH)	500 mg
N-acetylcysteine (NAC)	200 mg

*NRV: Nutrient Reference Value

Full ingredient list

Reduced L-glutathione; N-acetylcysteine; capsule shell: hydroxypropyl methylcellulose, gellan gum.

How to use

Part of your daily rhythm.

How to use

Take 1 capsule 30 minutes before a meal or immediately after exercise.

Important information

Do not exceed the recommended daily serving. Food supplements should not replace a varied diet. A balanced diet and healthy lifestyle are recommended. Store in a cool, dry place, out of reach of young children. Do not use if you are allergic or intolerant to any ingredient.

Science & sources

Understand the formula.

These references examine oral reduced glutathione and NAC as a cysteine source. They include a longer-term trial measuring GSH stores, a study using 500 mg of glutathione daily, and a meta-analysis of 26 controlled NAC trials. The finished combination was not tested in these publications.

These publications concern the studied ingredients or formulas. They do not all evaluate the finished Doctor Life product, and research results do not guarantee individual outcomes.

01Randomized controlled trial of oral glutathione supplementation on body stores of glutathione

John P. Richie Jr, Sailendra Nichenametla, Wanda Neidig, Ana Calcagnotto, Jeremy S. Haley, Todd D. Schell, Joshua E. Muscat

European Journal of Nutrition (2015), 54(2), 251-263. DOI: 10.1007/s00394-014-0706-z; PMID: 24791752.

In a six-month randomized, double-blind trial, 54 healthy adults received 250 mg or 1,000 mg of oral GSH daily, or a placebo. Glutathione increased in several body compartments, including blood, red blood cells, plasma, and lymphocytes. In the 1,000 mg group, increases were around 30–35% in several compartments and 260% in oral mucosal cells. The 250 mg group also showed significant increases in blood and red blood cells. The study used different doses from this product.

Read publication ↗

02Glutathione as an oral whitening agent: a randomized, double-blind, placebo-controlled study

Nutthavuth Arjinpathana, Pravit Asawanonda

Journal of Dermatological Treatment (2012), 23(2), 97-102. DOI: 10.3109/09546631003801619; PMID: 20524875.

In a four-week randomized, double-blind trial, 60 healthy participants took 500 mg of oral glutathione daily or a placebo. Melanin index decreased at all six measured sites in the glutathione group, but differences from placebo were statistically significant at only two sites. The daily GSH amount matches one capsule; the combined Doctor Life formula was not tested.

Read publication ↗

03N-acetylecysteine, a powerful agent in the reinforcement of anti-oxidant profile: A systematic review and dose-response meta-analysis of controlled clinical trials

Mahsa Mahmoudinezhad, Fatemeh Abbaszadeh, Meysam Zarezadeh, Nazgol Bahreini, Parsa Jamilian, Parmida Jamilian, Alireza Ostadrahimi

Clinical Nutrition ESPEN (2023), 54, 227-238. DOI: 10.1016/j.clnesp.2023.01.021; PMID: 36963867.

A meta-analysis of 26 controlled clinical trials examined NAC and antioxidant status. Pooled results showed increased glutathione and total antioxidant capacity. NAC supplies cysteine, one of the three amino acids used to make glutathione. These findings concern NAC and do not establish the effects of combining it with oral GSH.

Read publication ↗

FAQ / Glutathione + N-A-C

Good questions. Clear answers.

Talk to us ↗

Is oral glutathione absorbed?

Earlier short studies produced mixed findings. A six-month randomized trial found increased glutathione levels in several body compartments with 250 or 1,000 mg daily. Other research also reports measurable responses to oral GSH, although the size of the response depends on the formulation. The evidence does not support the blanket claim that oral glutathione has no effect on glutathione levels.

Why combine glutathione and NAC in one capsule?

They address glutathione availability in different ways. Reduced glutathione supplies GSH, while NAC provides a source of cysteine used to make glutathione. The combination brings these two approaches into one formula.

Has a 500 mg glutathione serving been studied?

Yes. A randomized trial studied 500 mg of oral glutathione daily for four weeks and reported biological changes compared with placebo. A longer trial found increased glutathione levels at 250 and 1,000 mg daily. Results depend on the outcome measured and do not guarantee an individual benefit.

Is 200 mg of NAC enough?

Many NAC studies use higher amounts. In this formula, NAC accompanies GSH rather than acting as the sole ingredient. Although 200 mg has appeared as a comparator dose in a clinical study of glutathione metabolism, that does not establish it as the optimal dose or prove the effectiveness of this combination.

What does “reduced glutathione” mean?

Glutathione occurs mainly as reduced GSH and oxidized GSSG. GSH participates in reduction reactions and is the form used in this product. “Reduced” describes the molecule’s chemical state, not a smaller amount or weaker version.

Does glutathione “detox” the body?

Glutathione takes part in enzyme-driven reactions involving certain compounds and helps maintain redox balance. This should not be interpreted as a general promise to cleanse the body. A supplement does not replace liver or kidney function or treatment for poisoning.

Why use DRcaps® and protective-atmosphere packaging?

Glutathione and NAC contain reactive sulfur groups, so limiting oxygen exposure is relevant to formulation. The label specifies protective-atmosphere packaging and a DRcaps® capsule designed to help protect its contents in the stomach’s acidic environment. These features do not by themselves establish a particular absorption rate or clinical effect.

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