NAC (N-Acetyl L-Cysteine)
NAC (N-Acetyl L-Cysteine) 90 Capsules View larger

NAC (N-Acetyl L-Cysteine)

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What is N-Acetyl-L-Cysteine?

N-Acetyl L-Cysteine is often referred to simply as NAC and it is actually a precursor to glutathione, which is another highly beneficial compound. The body can actually naturally synthesize L-Cysteine, but on top of that, it is also commonly located in foods such as egg yolks, chicken, and red peppers. L-Cysteine is a non-essential amino acid, and it is described as being non-essential, due to the fact that the body can naturally synthesize it. However, just because it is non-essential, that doesn’t mean that we can’t benefit from increasing our daily intakes. N-Acetyl L-Cysteine is basically an altered form of L-Cysteine, due to the fact that L-Cysteine supplementation would be incredibly unstable. It is attached to an Acetyl group, hence the name.

How does it work?

NAC works in a whole host of different ways, which is why it is considered to be so useful and beneficial. One of the ways in which is works, is that it helps to actively lower LDL cholesterol, which is the bad cholesterol that is responsible for blocking and clogging our arteries. It also works to increase our immune systems, help improve liver health and function, assist with protein synthesis, and increase energy levels. It functions as a potent antioxidant that helps to eradicate free-radicals and toxins from the body, promoting overall health and well-being and helping to reduce the risk of certain forms of cancer.

What are the Benefits of N-Acetyl-L-Cysteine supplements?

Some of the primary benefits of NAC supplements include the following:

Anti cancer

As mentioned, one of the best benefits associated with this supplement, is the fact that it can function as a very potent and very effective anti-cancer supplement. It functions as an antioxidant, which helps to destroy toxins and free radicals that would ordinarily attack our cells, oxidize them, and cause them to mutate.

It protects the liver

Another benefit of NAC, is the fact that it has been found to protect the liver in a whole host of different ways. To begin with, it can help to reduce the toxicity of certain toxins and pollutants that could damage the liver. It can even reduce the harmful effects of alcohol on the liver, making it very healthy indeed.

Improved heart health

As NAC helps to dramatically reduce LDL cholesterol, the heart, and indeed, the cardiovascular system in general, will benefit in a number of ways. LDL cholesterol can block the arteries and can cause strokes, heart attacks, blood clots, hypertension, and much more besides. As LDL cholesterol levels are greatly reduced thanks to NAC, our heart and cardiovascular system in general, benefits hugely.

Other benefits include:

  • Increased energy levels
  • Improved post-workout recovery
  • A stronger immune system
  • Reduced LDL cholesterol levels
  • Reduced risk of cancer
  • Helps protect the liver
  • Easily absorbed
  • Promotes general health and well-being
  • And more…

How and when should they be consumed?

Health Canada Recommended Dose (powder): Adults: 1 Scoop(s) 1 time(s) per day. Take with meals.

Health Canada Recommended Dose (capsules): Adults: 1 Capsule(s) 1 time(s) per day. Take with meals.

N-Acetyl L-Cysteine VS L-Cysteine

As mentioned, NAC is derived from L-Cysteine, but is attached to an acetyl group to make it more stable. L-Cysteine supplementation alone is very unstable as it can lead to cysteine toxicity. This is very serious as it could seriously damage your body’s cells, and could even kill you. By attaching it to an acetyl group however, it becomes much safer and much more stable for human consumption.

What can it be stacked with?

Most individuals will consume NAC supplements for general health and well-being purposes, meaning that it stacks well with vitamin supplements such as Vitamin C, and multi-vitamins. Omega 3 supplements also work well with it. In particular, it stacks very well with ascorbic acid, AKA Vitamin C, because it too functions as an antioxidant.

N-Acetyl-L-Cysteine Ingredients

Per Scoop

Medicinal Ingredients (per scoop): N-Acetyl-L-cysteine .......................... 500 Milligrams
Non-Medicinal Ingredients: none.

Per Capsule

Medicinal Ingredients (per capsule): N-Acetyl-L-cysteine .......................... 500 Milligrams
Non-Medicinal Ingredients: Gelatin.

Potential side effects

As with all supplements, always consult your doctor before using any new supplements, and discontinue usage if you experience any adverse side effects. Pregnant and breastfeeding women should not use this supplement, as not enough is yet known about its safety. Although very beneficial, there are still side effects associated with NAC supplements, which include the following:

  • Nausea
  • Vomiting
  • Diarrhea
  • Constipation
  • Stomach cramps
  • Gas
  • Bloating
  • Clamminess
  • Drowsiness

Contraindications: If you are taking antibiotics, do not use this product. If you are taking nitroglycerin, do not use this product.

Cautions and Warnings

If you are pregnant or breastfeeding, consult a health care practitioner prior to use. If you have kidney stones, consult a health care practitioner prior to use.

Allergen warnings

Allergy Statement: This product is made in a facility that handles milk products, gluten, shellfish, soy, peanuts and other tree nuts.

Disclaimer: The above description does not constitute medical advice and is for informational purposes only and has not been evaluated by Health Canada, CFIA, or FDA. Please consult a properly licensed medical professional before consuming nutritional supplements. This product is not intended to treat, diagnose or cure any disease.

NAC (N-Acetyl L-Cysteine) Reviews

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Verified Buyer

Product Options: Powder - 100 g
Ana Maria T. on 03/05/2019
I give this to my son to clear tics.
It’s better price then buying capsules from other stores.

Verified Buyer

Product Options: Capsules - 90 x 500 mg
Alex h. on 25/11/2018

Verified Buyer

Product Options: Capsules - 90 x 500 mg
Matt P. on 26/06/2018

Verified Buyer

Great product
Rodolfo A. V. on 15/01/2018
Do not drink alone with water

Verified Buyer

good product
carol s. on 21/08/2017
am using to de-toxify

Verified Buyer

One of my favorite supplement
Marie G. on 21/03/2017
NAC can do so much for our health. Again, I found at Canadian Protein, another supplement I needed for a reasonable price. Thanks again!

Verified Buyer

A must
Jesse N. on 19/03/2017
Keep that liver clean!

Verified Buyer

Marian B. on 11/10/2016
More product fabrication details are needed. Purity, extraction method, concentration ... and so on ...


Send us your question

questions Jaana on 06/01/2019
Question: Is this product available in powdered free form. non capsules ?
Answer: Hello in fortunately at this time our NAC is only available in capsule form. 
questions Michelle on 07/10/2017
Question: Hello, How many servings does the powder contain ? The smallest bag. Thank you !
Answer: Hi Michelle, there is 200 servings in our 100g NAC (N-Acetyl L-Cysteine).

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