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N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
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N-Acetyl Cysteine (NAC)

$14.95
$14.95 $14.95

N-Acetyl Cysteine is a daily antioxidant formula designed to support healthy hormone balance, a balanced inflammatory response, and cellular detox pathways using clinically studied NAC so you can feel supported through every cycle and season of life.

Supports reproductive health, immune balance, and whole-body oxidative defense.

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N-Acetyl Cysteine (NAC)

$14.95
$14.95 $14.95

Free delivery on orders over $99

Key highlights
  • Supports healthy ovulation and reproductive function
  • Supports a balanced inflammatory response
  • Supports pelvic comfort and cyclical well-being
  • Supports cellular detox and glutathione production
  • Supports immune system balance
  • Supports overall antioxidant defense

How to use

Serving size: 1 capsule
Servings per container: 30

Suggested use: Take 1 capsule daily with food and water. Morning or midday is ideal.

Optional routine:

  • Start with 1 capsule every other day for 3–5 days if you have a sensitive stomach, then increase to daily use.
  • If stacking with other supplements, take with meals to support comfort.

Ingredients

Key ingredient:

  • N-Acetyl-L-Cysteine (700 mg)

Want full details? Scroll down for the full Supplement Facts panel, ingredient-by-ingredient breakdown, and research links.

Other ingredients: Hypromellose (capsule), stearic acid, microcrystalline cellulose, silica.

Shipping & returns

If you’re looking to return or exchange your order for whatever reason, we're here to help! We offer free returns within 30 days of purchase.

You can return your product for store credit, a different product, or a refund to the original payment method.
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)

Size: 30 Capsules

N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)
N-Acetyl Cysteine (NAC)

Why you'll love it

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Clinically Studied Antioxidant Support

N-Acetyl Cysteine has been studied in women’s health, immune balance, and oxidative stress. Our formula delivers 700 mg of NAC in a clean, straightforward capsule designed for daily use.

Hormone & Cycle Support

Oxidative stress can impact hormone balance and ovarian health. NAC supports glutathione production, helping maintain a healthy environment for reproductive and immune function.

Simple Daily Ritual

One capsule daily. Easy to stack with your hormone or immune routine. Subscribe and save so your antioxidant support never runs out.

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Supplement Facts

Serving Size: 1 Capsule
Servings Per Container: 30

(Insert Supplement Facts image here)

Amount Per Serving:
N-Acetyl-L-Cysteine – 700 mg
Daily Value not established

Other ingredients: Hydroxypropyl methylcellulose, stearic acid, microcrystalline cellulose, silica.

Key Ingredients

N-Acetyl-L-Cysteine (NAC)

Supports glutathione production and antioxidant balance.

Learn More

N-Acetyl-L-Cysteine (NAC)

N-Acetyl-L-Cysteine is a stable form of the amino acid cysteine and a direct precursor to glutathione, the body’s primary intracellular antioxidant. Glutathione plays a central role in cellular detox pathways, immune signaling, and protection against oxidative stress. NAC has been studied for supporting reproductive health, ovulatory function, and balanced inflammatory signaling in women. This formula provides 700 mg per capsule to support daily redox balance and hormone health.

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Why Dr. Brighten Recommends It

Oxidative stress and inflammation can influence everything from hormone signaling to immune balance. Supporting the body’s natural antioxidant systems is one foundational way to help women feel resilient and supported through life’s demands.

I formulated N-Acetyl Cysteine around three priorities:

  1. Glutathione support to maintain healthy cellular detox pathways
  2. Balanced inflammatory signaling for immune and pelvic comfort
  3. Reproductive support for ovulatory and ovarian health

I recommend N-Acetyl Cysteine for women who want support with cyclical discomfort, immune resilience, or oxidative stress, especially during high-demand seasons of life.

Ask a clinician first if you are pregnant, nursing, trying to conceive, taking medications, or managing a medical condition.

Research Shows

What the Research Shows: Clinical Evidence Summary

N-Acetyl Cysteine (NAC) provides 700 mg per capsule as a glutathione precursor and antioxidant with anti-inflammatory and immune-modulating activity. Note: Individual RCTs typically evaluate NAC at 600–1,800 mg/day (often divided), higher than the single-capsule serving but within average exposure for intermittent regimens used in endometriosis trials.

*These studies explore outcomes related to NAC used in clinical research. Research on NAC does not necessarily reflect the effect of multi-ingredient formulas. When study doses differ from this product, we note it. Not intended to diagnose, treat, cure, or prevent any disease.

N-Acetyl Cysteine (700 mg/capsule)
 Studied for: endometriosis-related pain/cyst size, PCOS ovulation/fertility, SLE disease activity, and oxidative stress/inflammatory biomarkers (multiple RCTs and meta-analyses).onlinelibrary.wiley+5
Dose note: RCTs typically 600–1,800 mg/day (e.g., 600 mg TID 3 days/week ≈770 mg/day average for endometriosis); SLE trials 1,800–2,400 mg/day. Product: 700 mg/day. (PMC Endometriosis Cohort)
Further reading:
Porpora et al., 2013 (observational cohort): PMC
 Rossi et al., 2023 (prospective cohort): PMC
 Thawani et al., 2015 (PCOS meta-analysis): Wiley Online
 Lai et al., 2012 (SLE RCT): Wiley Online
 Omidian et al., 2023 (SLE RCT): PMC
 Asbaghi et al., 2021 (inflammation meta-analysis): ScienceDirect
 Systematic review on human health impacts (trials through 2021): PMC

Endometriosis Symptom Support
 Studied for: reduced dysmenorrhea/dyspareunia/chronic pelvic pain, smaller endometrioma growth, lower CA-125, and higher pregnancy rates (cohort studies).pmc.ncbi.nlm.nih+1
Dose note: 600 mg TID, 3 days/week (~1,800 mg on treatment days). Product: 700 mg/day. (PMC)
Further reading:
Porpora et al., 2013 (92 women): cyst diameter -1.5 mm vs +6.6 mm control; pain ↓50–59%; 24 avoided surgery PMC
 Rossi et al., 2023 (120 women): VAS pain ↓~2 points each symptom; cyst size 36.5→33 mm; 75% spontaneous pregnancy PMC

PCOS Fertility Support
 Studied for: higher ovulation, clinical pregnancy, and live birth rates vs placebo (8 RCTs, n=910).[onlinelibrary.wiley]​
Dose note: 600–1,800 mg/day. Product: 700 mg/day. (Wiley Online)
Further reading:
Thawani et al., 2015 meta-analysis: NAC ↑odds of ovulation/pregnancy vs placebo Wiley Online
 Jamilian et al., 2017 (RCT): NAC + clomiphene ↑ovulation in PCOS PMC

Autoimmunity (SLE) Support
 Studied for: ↓SLEDAI/BILAG scores, multi-organ improvements, ↑CH50 (RCTs).onlinelibrary.wiley+1
Dose note: 1,800–2,400 mg/day. Product: 700 mg/day. (PMC)
Further reading:
Lai et al., 2012 (RCT, n=36): ≥2.4 g/day ↓SLEDAI P=0.0007–0.0046 Wiley Online
 Omidian et al., 2023 (RCT, n=80): 1.8 g/day ↓SLEDAI P=0.034, BILAG P=0.023 PMC

Inflammation/Oxidative Stress Biomarkers
 Studied for: ↓MDA, IL-8, homocysteine; subgroup ↓TNF-α/IL-6 (28 trials meta-analysis).[sciencedirect]​
Dose note: 600–1,200 mg/day. Product: 700 mg/day. (ScienceDirect)
Further reading:
Asbaghi et al., 2021 meta-analysis: consistent biomarker reductions ScienceDirect
 De Flora et al., 2021 review: glutathione/GSH replenishment mechanisms PMC

Thyroid Hormone Modulation Studied for: attenuated T3 decline in acute stress/NTIS (small RCT).[pmc.ncbi.nlm.nih]​ Dose note: 1,200 mg IV q12h acute. Product: 700 mg/day oral. (PMC) Further reading: Başkal et al., 2013 (RCT post-MI, n=67): NAC preserved T3 at 12h P=0.045 PMC

30-Day Guarantee

Try N-Acetyl Cysteine for 30 days. If it’s not for you, contact our team for help with next steps.

FAQ

How long does one bottle last?

Each bottle contains 30 capsules. At one capsule daily, it lasts 30 days.

When should I take it?

Take 1 capsule daily with food, ideally in the morning or midday.

Can I take it every day?

Yes. NAC is commonly used daily for ongoing antioxidant and immune support.

Can I take it with coffee or other supplements?

Yes. It can be taken alongside most supplements. Taking it with food may improve comfort.

Is this safe if I am trying to conceive, pregnant, or nursing?

If you are pregnant, nursing, or trying to conceive, speak with your clinician before use.

What if I have a sensitive stomach?

Start with one capsule every other day for several days, then increase to daily use with meals.

Who is this not for?

Consult your clinician if you take prescription medications, especially nitroglycerin, or if you have a medical condition requiring supervision.

Pairs well with

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