NAC (N-Acetyl Cysteine) Supplements

What NAC is and what people take it for

NAC is made from the amino acid L-cysteine and acts as a precursor to glutathione — meaning your body uses it as a raw material to make one of its key antioxidants. Most people take it for everyday antioxidant and immune support, and to help support normal liver function. Because glutathione plays a role across so many cells, NAC has become one of the more popular single-ingredient supplements.

Forms and potencies

• 600 mg capsules — the standard, well-studied amount and the most common way people take NAC day to day.
• 900–1000 mg — higher-potency capsules and tablets for those who want a larger single dose.
• Powder — flexible dosing; mixes into water or a smoothie.
• Effervescent tablets — dissolve in water if you’d rather not swallow capsules.
• Liposomal liquid — the NAC is wrapped in a thin fat layer to support absorption.
• Paired formulas — some combine NAC with glycine, selenium, or quercetin.

How to choose

The right NAC comes down to the dose and format that fit your routine. A standard 600 mg capsule suits most people; powders and effervescent tablets help if you don’t like capsules or want to adjust the amount; liposomal is an option if absorption is your main interest. Check the per-capsule amount so you know what a serving actually delivers.

NAC in Canada

Every NAC supplement we carry is licensed for sale in Canada (with an NPN on the label) and shipped across the country from our warehouse in Ontario.