NAC N-Acetyl Cysteine - Extra Strength

$22.99 $6.90

Free Shipping

Free Returns

Breathe easier with NAC! This unique derivative of the amino acid L-cysteine is trending, and for good reason. It offers potent support for both respiratory health and detoxification. Swanson Extra Strength NAC offers 1,000 mg N-acetyl cysteine per serving to support multiple systems for total-body health.

NAC (N-acetyl cysteine) promotes healthy respiratory function through its antioxidant properties. NAC also stimulates production of glutathione, the body’s master antioxidant. Healthy glutathione levels help the body fight oxidative stress from free radicals, support immune system function and may even promote healthy aging. NAC also supports healthy levels of glutamate, a neurotransmitter that is central to learning, behavior and memory. Additionally, NAC and glutathione support the body’s detoxification pathways for healthy liver function.

Support your lungs, liver, immune health and more with Extra Strength NAC from Swanson.


Supplement Facts

Serving Size 1 Vegan Tablet

Servings Per Container 60

Amount Per Serving % Daily Value
N-Acetyl Cysteine (NAC) 1 g *

*Daily Value not established.

Other Ingredients: Microcrystalline cellulose (plant fiber), stearic acid, hydroxypropyl cellulose, film coating [dextrin, dextrose, lecithin (soy), sodium carboxymethylcellulose, sodium citrate], silica, croscarmellose sodium, magnesium stearate.

Allergen Information: Contains soy.

Bioengineered Ingredients: Contains a bioengineered food ingredient.

Suggested Use: As a dietary supplement, take one vegan tablet per day with water or as recommended by your healthcare provider.

Warning: For adults only. Do not take this product if you are pregnant or nursing. Consult your healthcare provider before using this or any product if you are taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.

CA WARNING: Risk of cancer and reproductive harm from exposure to lead. See www.P65Warnings.ca.gov




  1. What Is NAC and What Does It Do?
    NAC, short for N-acetyl-L-cysteine, is a form of the amino acid cysteine. It serves as a precursor to glutathione, one of the body's most important antioxidants. NAC supplements are commonly used to support antioxidant activity, cellular health, liver function, and the body's natural detoxification processes. They are also popular for supporting respiratory wellness and overall healthy aging.
  2. When Is the Best Time to Take NAC?
    NAC can be taken at any time of day, but many people prefer to take it consistently at the same time each day as part of their wellness routine. Follow the directions provided on your supplement label. If you have questions about when to take NAC based on your individual health needs or medications, consult your healthcare provider.
  3. How Long Does It Take for NAC to Work?
    The timeframe can vary depending on the reason for use, dosage, and individual factors such as diet and lifestyle. Some people incorporate NAC into their daily wellness routine for ongoing antioxidant and cellular support. As with many supplements, consistent use over time may help support the best results.
  4. What Are the Side Effects of NAC?
    NAC is generally well tolerated when used as directed. Some individuals may experience mild side effects such as stomach discomfort, nausea, or digestive upset. If you are pregnant, nursing, taking medications, or have a medical condition, consult your healthcare provider before using NAC or any dietary supplement.
  5. What makes Swanson NAC Extra Strength different from standard NAC supplements?
    Swanson NAC Extra Strength delivers a potent 1,000 mg of N-acetyl-L-cysteine (NAC) per serving, providing a higher-strength option for those looking to support their antioxidant defenses and glutathione production with fewer tablets. Plus, the formula is vegan-friendly for added dietary flexibility.
  6. Is Swanson NAC Extra Strength suitable for special diets?
    Yes. Swanson NAC Extra Strength is designed to fit a variety of dietary preferences and wellness lifestyles. This formula is vegan, gluten-free, and dairy-free, making it a convenient choice for individuals seeking plant-based antioxidant support without common dietary allergens. Whether you're following a vegan lifestyle or simply avoiding gluten or dairy, this NAC supplement can easily fit into your daily routine.