Pure Encapsulations

NAC (N-Acetyl Cysteine)

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The Promise

N‑Acetyl‑L‑Cysteine in vegetarian capsules — What this is

A free‑form N‑acetyl‑L‑cysteine (NAC) supplement available in 600 mg and 900 mg vegetarian capsules with added ascorbyl palmitate.

Pure free‑form NAC

Each capsule delivers N‑acetyl‑L‑cysteine in a free‑form amino acid state, supplied as 600 mg or 900 mg strengths.

Includes fat‑soluble vitamin C

Contains ascorbyl palmitate (a fat‑soluble form of vitamin C) at 5 mg per 600 mg capsule and 10 mg per 900 mg capsule.

Vegetarian capsule and simple excipients

Formulated in vegetarian capsules with minimal other ingredients (cellulose, water).

Available multiple sizes

Offered in several bottle counts and two potency options so you can choose 600 mg or 900 mg per capsule.

Why It Works

Why this formulation matters — Ingredient forms, dosages, and tissue affinity

Key formulation details explain how NAC is presented and how common dosing ranges are provided.

01

Free‑form cysteine derivative

N‑acetyl‑L‑cysteine is the acetylated derivative of L‑cysteine and is supplied here as a free‑form amino acid.

02

Fat‑soluble ascorbate selection

Ascorbyl palmitate is used as the vitamin C source, providing a fat‑soluble form at low milligram levels per capsule.

03

Clear dosing options

Capsules come in distinct 600 mg and 900 mg strengths to match recommended daily ranges.

04

Recommended daily range

The product aligns with a suggested total daily intake between 600 and 1,800 mg, delivered in divided doses.

Reviews

Customer Reviews

Your Journey

How to take it — Serving, timing, precautions and practical notes

Simple, label‑supported directions and cautions for everyday use.

Serving

Take three capsules daily for 900 mg capsules

Suggested use for the 900 mg option is three capsules per day in divided doses.

Timing

Take between meals

Doses are recommended in divided amounts taken between meals.

Safety and interactions

Check medications and pregnancy status

NAC may interact with nitroglycerin and metoclopramide; consult a physician if pregnant or lactating.

Form and storage

Vegetarian capsules with minimal additives

Comes as vegetarian capsules containing cellulose and water as other ingredients; follow standard dry, cool storage.

Product education

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NAC (N-Acetyl Cysteine)

N-Acetyl-Cysteine is a powerful antioxidant and nutrient for our defense system. NAC is especially important for lung functioning and tissue repair, as well as mucous thinning agent. NAC also assists the liver in the detoxification process by maintaining levels of glutathione, an antioxidant vital for our immune system.

What Is NAC?

N-Acetyl-l-Cysteine (NAC) is a derivative of the dietary amino acid l-cysteine. NAC has a high affinity for lung tissue, which it supports through mucolytic and antioxidant action. NAC also enhances glutathione production which may play a role in heavy metal detoxification.*

Uses For NAC

Immune And Respiratory System Health:

When mucus thickens, it can become difficult to expel. Due to its sulfur content, NAC is able to disrupt disulfide bonds, thinning the mucus so that it, along with the trapped particles and bacteria, are more easily expelled from the lungs. NAC is a powerful free radical scavenger and thus supports epithelial cell health and healthy cilia activity in the respiratory tract. NAC is also a precursor to the antioxidant glutathione. Supplemental NAC increases tissue levels of glutathione. Lymphocytes, specific components of the immune system, rely on glutathione to function properly. Tissues enhanced with glutathione support overall antioxidant protection and help to maintain a healthy immune response. A multicenter, randomized, double blind trial with 262 participants indicated that NAC supplementation for 6 months supported upper respiratory tract and immune system health. A recent meta-analysis of 8 double blind, placebo controlled trials provided additionalsupport for NAC’s abilityto support respiratory tract health.*

What Is The Source of Glutathione?

Pure Encapsulations N-Acetyl-l-Cysteine is a free-form amino acid derived from protein and extensively purified. The vitamin C (as ascorbyl palmitate) is derived from corn dextrose fermentation and palm oil.

Recommendations

Pure Encapsulations recommends between 600-1800 mg per day, in divided doses, between meals. Pure Encapsulations NAC capsules come in both 600 and 900 mg capsules.

Are There Any Potential Side Effects Or Precautions?

Rare side effects may include nausea, vomiting, headache, dry mouth, dizziness, or abdominal pain. If pregnant or lactating, consult your physician before taking this product.

Are There Any Potential Drug Interactions?

NAC may interact with nitroglycerin and metoclopramide. Consult your physician for more information.

Watch Dr. Larson Discuss NAC Health Benefits*

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: 3 capsules per day, in divided doses, between meals.
Each vegetarian capsule contains:
Ingredients AMT %DV
N-acetyl-l-cysteine (free- form) 600 mg -
vitamin C (as ascorbyl palmitate) 5 mg -
-------------------------------- -- -
n-acetyl-l-cysteine (free- form) 900 mg. -
vitamin C (as ascorbyl palmitate) 10 mg. -
1–2 capsules per day, between meals. - -
Other Ingredients: cellulose, water
(-) There is no %DV or the manufacturer has not provided this data.