Thorne Research

NAC

$33.00

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The Promise

Product identity and quality N‑Acetylcysteine (NAC) — 500 mg per capsule, NSF Certified for Sport®

Thorne CystePlus® provides a quantified NAC dose in a clean capsule formulation with third‑party sport certification.

Active ingredient & dose

Each capsule contains 500 mg N‑Acetyl‑L‑Cysteine (NAC).

Formulation & excipients

Vegetarian hypromellose capsule with leucine and silicon dioxide.

Certification

NSF Certified for Sport®—tested for purity and banned substances relevant to athletes.

Package servings

90 capsules per container (serving size: one capsule).

Why It Works

How this formulation is distinct Specific ingredient role, form, and documented actions

Facts tied to NAC’s known biochemical role and the product’s composition.

01

Glutathione precursor

NAC provides the direct precursor to intracellular glutathione as stated in the product description.

02

Mucolytic action

Product notes NAC’s mucolytic property — helps to thin and break up mucus in the airways.*

03

Liver Phase II support*

Described as supporting the liver’s natural Phase II detoxification pathways via glutathione supply.*

04

Measured single‑ingredient dose

Single active ingredient at a standardized 500 mg per capsule simplifies dosing and tracking.

Reviews

Customer Reviews

Your Journey

Use, storage, and safety Practical directions, precautions, and ingredient notes

Follow labeled directions and consult your practitioner for pregnancy or hypersensitivity concerns.

Serving

Suggested use

Take 1 capsule two to three times daily or as recommended by your health‑care practitioner.

Format & handling

Capsule format

Vegetarian hypromellose capsules; contains leucine and silicon dioxide as non‑active ingredients.

Warnings

Allergy & pregnancy guidance

Contraindicated in individuals with hypersensitivity to any ingredient. If pregnant, consult your health‑care practitioner before use.

Interactions note

Known interactions

There are no known adverse interactions or contraindications as of the publication date.

Product education

CystePlus®: A Potent N-Acetylcysteine for Respiratory and Liver Support*

Thorne’s CystePlus® provides a potent dose of N-Acetylcysteine (NAC), a powerful amino acid antioxidant that is a direct precursor to glutathione. As the body’s “master antioxidant,” glutathione is essential for protecting cells from oxidative stress and supporting the liver’s natural detoxification processes. CystePlus® is a foundational supplement for individuals seeking to enhance their antioxidant defenses, support respiratory wellness, and promote healthy liver function.*

How It Works: The Glutathione Precursor

NAC is a versatile nutrient that exerts its benefits primarily by replenishing intracellular levels of glutathione.*

Support for Respiratory Health
One of the most well-researched benefits of NAC is its ability to support respiratory health. It has mucolytic properties, meaning it helps to thin and break up mucus in the airways. This action promotes clear breathing and helps to maintain the health of the entire respiratory tract, especially during seasonal challenges.*

Enhancing Detoxification and Antioxidant Defenses
By providing the direct building block for glutathione, NAC is a cornerstone of the body’s defense system. Glutathione is concentrated in the liver, where it plays a critical role in Phase II detoxification, binding to and helping to eliminate toxins. It also provides powerful antioxidant protection for every cell in the body against the damaging effects of free radicals and environmental pollutants.*

  • Provides 500mg of the powerful antioxidant N-Acetylcysteine (NAC)
  • Acts as a direct precursor to the body’s master antioxidant, glutathione
  • Promotes respiratory health and helps to thin mucus*
  • Supports the liver’s natural detoxification pathways*
  • NSF Certified for Sport®, trusted for purity and safety

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: Take 1 capsule two to three times daily or as recommended by your health-care practitioner.
Serving Size: One Capsule
Servings Per Container: 90
Ingredient Amount %DV
N-Acetyl-L-Cysteine 500 mg **
Other ingredients: Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.
**Daily Value (DV) not established.
ALLERGY WARNING
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.
PREGNANCY
If pregnant, consult your health-care practitioner before using this product.
INTERACTIONS
There are no known adverse interactions or contraindications at publication date.