$49.95
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This Practitioner Product will be dispensed under the care of a qualified Naturopath.
Practitioner only products are only available to Mr Vitamins members. To access, complete the health survey below, and a member of our team will review your case prior to dispatch. Sometimes one of our Naturopaths may need to make contact to confirm whether this is the best product for you If you already have access, it will appear after you sign-in.
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Description
Healthwise NAC is 100% pure N-Acetyl-L-Cysteine (NAC) powder, a form of the amino acid L-cysteine. This pharmaceutical-grade powder is packed without fillers or flowing agents.
Product Strengths
- 100% pure N-Acetyl-L-Cysteine powder
- No fillers or flowing agents
- Vegan friendly, gluten free and dairy free
- Flexible powder format that mixes into your favourite beverage
Ingredients
- N-Acetyl-L-Cysteine (100% pure)
Suggested Use
General use: take 1000 mg (1 g) with your favourite beverage between meals. Best taken on an empty stomach. May be combined with vitamin C powder. Best consumed through a straw, as the powder is acidic and can be irritating to teeth.
Storage
Store below 25°C in a cool, dry place, away from direct sunlight. The powder is hygroscopic and may clump if exposed to moisture.
Always read the label and follow the directions for use. Vitamin and mineral supplements should not replace a balanced diet.
ingredients
N-Acetyl-L-Cysteine 3500mg
Note: The above measurements display the amount of milligrams per amino equivalent to a 5ml metric teaspoon. Powders are loosely filled, levelled but not compacted.
suggested dose
As a dietary supplement for general health take 600 mg with your favourite beverage between meals.
Precautions
For specific conditions please consult your healthcare professional.
L-Cysteine
What is L-cysteine?
L-cysteine is a sulfur-rich amino acid your body can make from methionine. You'll find it as free L-cysteine, as L-cystine (two cysteines joined together) or as a hydrochloride salt. It's a different ingredient from NAC, so check the label for the one you want.
Christina HanleyBHSc (Nutritional Medicine), Digital Experience & Content Manager
Checked this page October 2026
See what we checked
Is L-Cysteine right for you?
Common questions
Is L-cysteine the same as NAC?
No. NAC is N-acetylcysteine, a different ingredient with its own entry in the Australian rules. L-cysteine is permitted as an active ingredient with a 450 mg daily cap. In the listings we've seen, NAC only appears as a tiny inactive ingredient in skin products, which doesn't tell you its status as something you swallow. If it's NAC you're after, ask us.
Why does a cystine or hydrochloride label show a bigger number than 450 mg?
Because the cap is on the cysteine, not the whole compound. Whichever form is on the label, Australian rules cap a product at 450 mg of cysteine a day. Cystine and the hydrochloride salts weigh more per unit of cysteine, so the rules express the same limit as 450 mg of cystine, 585 mg of the hydrochloride or 652 mg of the monohydrate. A bigger number on those labels doesn't mean more cysteine.
The evidence, and its limits
The Australian rules
Not sure this is the right form for you? Ask one of our naturopaths. It is free and takes 10 minutes.
Always read the label and follow the directions for use. General information only, and not a substitute for advice from your doctor or one of our naturopaths.