• NACET - Zion Pharma

NACET – pure powder


NACET (N-Acetylcysteine ethyl ester) powder. Purity over 95%. A better absorbed version of NAC.

SKU: nacet-powder


OTHER NAMES: N-Acetylcysteine ethyl ester; N-Acetyl-L-cysteine ethyl ester;

CAS NUMBER: 59587-09-6

ATC CODE: none


ITEM TYPE: powder

QUANTITY PER PACK: 5 g to 20 g

SERVINGS PER PACK: not specified

SUGGESTED USE: not specified

STORAGE: Store in a cool and dry place. Keep away from direct sunlight and heat.

WARNING: Keep out of reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions, and/or taking prescription drugs or over the counter medications.

DISCLAIMER: Always consult with a qualified health physician before taking any new dietary supplement. This product is not intended to diagnose, treat, cure, or prevent any diseases.

SCOOPS: This product includes a measuring scoop ~50 mg.

The product is not intended for human use. For laboratory use only.

NOTE: Store tightly closed. Extremely unpleasant smell!

NACET is the N-Acetyl-Cysteine ethyl esther, which is the precursor to glutathione, the single most powerful antioxidant naturally occurring in human body. Thanks to its ethyl esther form, it is more lipophilic (fat-soluble) than the original NAC, which allows for better absorption through the lipid membranes of cells, making it is up to 20 times more bioavailable, which translates into more potent antioxidant effects.

By increasing glutathione levels, NACET helps protect cells from oxidative damage, which is important for maintaining cellular health and preventing the damage related to aging. It is vital for supporting the detoxification process in the liver; in fact, NAC has long been used in the treatment of acetaminophen poisoning. Apart from being a precursor to glutathione, NAC exhibits antioxidant properties of its own, directly scavenging free radicals. NACET, through its conversion to NAC, may influence the levels of various neurotransmitters in the brain. It is believed to prevent glutamate excitotixicity and help in the restoration and maintenance of healthy balance of monoamine neurotrasmitters – dopamine and serotonin, affecting mood, motivation and cognition.

NAC has also been shown to modulate the production of certain cytokines, which are signaling molecules that mediate and regulate immunity, inflammation, and hematopoiesis. Thanks to its action as a mucolytic agent, it is particularly useful in conditions like chronic obstructive pulmonary disease (COPD), bronchitis and chronic sinusitis.

Furthermore, studies show that NAC might play an important role both in the treatment and prevention of COVID-19 infection, overcoming the cognitive symptoms of “long COVID”, counteract abdominal obesity and dissolve kidney stones.

Anecdotal reports indicate that it may also lessen anxiety and alleviate the symptoms of obsessive-compulsive disorder (OCD) and reduce drug cravings. It might also improve executive function in autism and ADHD.

Benefits of taking NACET:

  • lessened anxiety;
  • increased mental clarity;
  • boost in focus and attention;
  • enhanced memory;
  • relief from OCD symptoms;
  • improved respiratory tract function;
  • enhanced executive function;
  • neuroprotective and anti-inflammatory effects;
  • possible aid in “long COVID”;
  • possible aid in weight loss;
  • possible aid in drug use cessation.

Side effects:

  • diarrhea;
  • nausea;
  • eye irritation;
  • abdominal discomfort;
  • headaches;
  • dry mouth;
  • suppressed HPA axis after prolonged use;
  • aggravation of pre-existing allergies due to histamine release.

In order to avoid gastrointestinal side effects of NACET, it is advised to take it together with selenium and molybdenum.


  • blood-thinning agents;
  • mucolytic agents;
  • anti-hypertensive agents (medical consultation is advised).


  • asthma (medical consultation is advised).


NACET is taken orally, typically 50 mg once or twice per day with meal. For better absorption and side effects reduction, it is advised to take it with selenium and molybdenum.

Please note that NACET has a potent, unpleasant odor – it is perfectly normal.