N-Acetyl Cysteine (NAC)

"I feel less fatigued, experiences relatively lesser mood swing and am in better control of my post meal sugar cravings. Will definitely be buying again!"

Kanikaa K, Verified buyer

N-Acetyl Cysteine (NAC)

N-acetylcysteine (NAC) is a powerful antioxidant that is scientifically validated for easing insulin- and androgen-related symptoms in PCOS. It is among the most popular supplements worldwide for naturally treating PCOS.
17 reviews
Regular price$22.95
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Regular price$22.95
  • Addresses multiple hormonal imbalances in PCOS
  • Among the best supplements for easing insulin resistance
  • Delivered as easy-to-take capsules
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N-acetyl cysteine (NAC) is a powerful antioxidant and semi-essential amino acid. It’s considered semi-essential because your body can produce it from other amino acids, namely methionine and serine. It has been shown to be beneficial in improving pregnancy rate, spontaneous ovulation, and improving menstrual regularity in women with PCOS.

NAC, taken as a supplement, is scientifically validated for easing various PCOS symptoms relating to high testosterone and insulin. It is among the most popular supplements worldwide for naturally treating PCOS.

Insulin resistance is a common issue amongst people with PCOS, which is when the cells in your muscles, fat, and liver don't respond properly to insulin and don't easily process glucose from your blood. Research shows that NAC could help improve insulin resistance, by helping regulate blood sugar levels.

In terms of the liver, NAC has also been shown to assist in helping to improve liver function with those who have non-alcoholic fatty liver disease. This is something many with insulin resistance may develop.

Ingredients (per serve): 100% pure n-acetyl cysteine (NAC), providing 500mg - 1000mg

  • Improves insulin resistance
  • Boosts fertility
  • Reduces inflammation
  • Balances hormones
  • Safe whilst TTC
  • Pregnancy & Breastfeeding Safe
  • Vegetarian & Vegan Friendly

NAC (500-1000mg)

Efficacy of NAC for ovulation in PCOS: PMID (27548190)

The results from a systematic review involving eight trials with 910 women that compared the effects of NAC with placebo in women with PCOS were: NAC had a significant improvement in pregnancy and ovulation rates as compared to placebo.

Efficacy of NAC for improving insulin resistance & inflammation: PMID ( 29502477).

In this study, we investigated whether NAC can affect insulin resistance in diet-induced obesity mice. The study found:

• NAC decreases body weight and fat

• NAC improves results on both glucose tolerance and insulin tolerance tests (indicating increased insulin sensitivity)

• NAC reduces adipose tissue (fat) inflammation.

In conclusion, it is likely that NAC can improve insulin resistance and chronic inflammation; however, early consumption of NAC is optimal.

Can NAC be taken with birth control?


Can I take more than once daily?

The dose of NAC used in clinical trials has ranged from about 600 mg to 3,000 mg per day, typically divided into two or three servings. Generally because most customers are taking other products also, only one capsule per day is generally needed.

Why does my NAC smell rotten?

The odour you smell is likely from the sulphur that is part of NAC (N-acetyl-cysteine), this is completely normal and why it is in a capsule and not a powder.

Take 1 capsule with your largest meal. Can be taken twice daily if needed. Only 30 capsules per packet.

Note: When you open your packet you may get a strong unpleasant smell. This is nothing to be concerned about, it is simply because it is derived from sulphur and once consumed you'll get no taste or aftertaste.

Customer Reviews
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Filter Reviews:
Kimberly H.
United States

Good product

The product seemed great I just hate it takes so long to ship to US.

Dana B.
United States United States

NAC is amazing!

I bought NAC on a 30 day supply one time only. because I was cautiously optimistic about this. I've tried all kinds of diets INCLUDING a pcos diet and nothing! I literally started NAC 2... DAYS... AGO!!! I already feel more normal and energetic then I've been in 2 YEARS! I deal with chronic migraines everyday that just wipe me. My daily mantra used to be " just go with your energy when you have it" I'd have to choose between daily activities. Today I could do everything I wanted to do! Amazing! I'm back today to put this stuff on autoship since I'm in the US.

United States United States

Only place to buy NAC

I’ve been taking NAC for a couple of years now. I live in the US and it’s unfortunately no longer sold here. This company is the only place I can currently find NAC! Definitely recommend for PCOS, liver, and lung issues.

United States United States


Love the pills instead of powder. Much better without the bitter taste.

Christina H.
United States United States

Would buy again

I am very happy with this product