NOW
Extra Strength NAC 1000 mg
84/100
SUPPIE SCORE
85/100
EFFICACY
High
SAFETY
78/100
CLEANLINESS
What Does Extra Strength NAC 1000 mg Do?
This high-dose NAC supplement effectively supports antioxidant defense and liver health with strong evidence from meta-analyses. The 1000 mg dosage is clinically appropriate and well-tolerated, posing low risk for most adults, though mild GI upset may occur.
What are the main health benefits of NAC supplementation?
How does NAC support glutathione production and antioxidant defense?
What dosage of NAC is recommended for liver health support?
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What Are the Benefits of Extra Strength NAC 1000 mg?
Based on proven scientific research
Antioxidant SupportStrong
Immune FunctionModerate
Liver HealthStrong
Respiratory SupportModerate
DetoxificationModerate
Good For:
What Are the Side Effects of NOW Extra Strength NAC 1000 mg?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•NAC at 1000 mg daily is generally safe for healthy adults, with common mild gastrointestinal side effects like nausea, vomiting, or diarrhea in up to 23% of users.
•Potential interactions include enhanced hypotensive effects with nitroglycerin or blood pressure medications; consult a physician if taking anticoagulants due to mild antiplatelet activity.
•Dosage of 1000 mg aligns with safe oral limits (up to 3000 mg/day studied); no overdose risk at recommended intake, but monitor for sulfur-related odor.
•Not recommended during pregnancy or breastfeeding without medical advice; contraindicated for those with kidney stones due to cysteine metabolism risks.
•Vegetarian/vegan-friendly with no major allergens, but produced in facilities handling common allergens like soy or nuts—check for sensitivities.
•Long-term use appears safe based on studies in chronic conditions, with no significant contamination concerns from GMP manufacturing.
Potential Side Effects
Negative Interactions
Allergens
None inherentPossible cross-contamination: soy, milk, egg, fish, shellfish, tree nuts, sesame
Inactive Ingredients
Microcrystalline cellulose
Low RiskHydroxypropyl cellulose
Low RiskStearic acid (vegetable source)
Low RiskCroscarmellose sodium
Low RiskHypromellose (cellulose)
Low RiskSunflower lecithin
Low RiskTriethyl citrate
Low RiskSunflower oil
Low RiskSilicon dioxide
Low RiskWhat Are the Ingredients in NOW Extra Strength NAC 1000 mg?
N-Acetyl L-Cysteine (NAC)
1000 mg
Microcrystalline Cellulose
Hydroxypropyl Cellulose
Stearic Acid (vegetable source)
Croscarmellose Sodium
Hypromellose (cellulose)
Sunflower Lecithin
Triethyl Citrate
Sunflower Oil
Silicon Dioxide
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Dosage & Bioavailability
How the active doses and forms in Extra Strength NAC 1000 mg compare to the research.
•N-Acetyl L-Cysteine (NAC) — 1,000 mg a day; within the 900-1,800 mg/day used in studies.
Sources & References
Acetylcysteine.html
Information from www.drugs.com
Nac 1000 mg tablets
Information from www.nowfoods.com
Store
Information from www.thefoodmill.com
Health benefits nac
Information from www.webmd.com
Drg 20311314
Information from www.mayoclinic.org
Supplements
Information from www.nowfoods.com
Now nac 1000 mg 120 tablets
Information from www.vitacost.com
PMC7892733
Information from pmc.ncbi.nlm.nih.gov
N acetyl cysteine uses and risks
Information from www.webmd.com
PMC1513138
Information from pmc.ncbi.nlm.nih.gov
NBK537183
Information from www.ncbi.nlm.nih.gov
N acetyl cysteine nac
Information from www.webmd.com
PMC8284175
Information from pmc.ncbi.nlm.nih.gov
33560443
Information from pubmed.ncbi.nlm.nih.gov
Cod liver oil extra strength 1000 mg softgels
Information from www.nowfoods.com
1657062964
Information from www.walmart.com
34237968
Information from pubmed.ncbi.nlm.nih.gov
Supplements
Information from www.nowfoods.com
PMC8211525
Information from pmc.ncbi.nlm.nih.gov
Now foods nac 1 000 mg 120 tablets
Information from www.iherb.com
Nac side effects.html
Information from www.drugs.com
PMC6566037
Information from pmc.ncbi.nlm.nih.gov
Supplements
Information from www.nowfoods.com
Dha 1000 fish oil extra strength softgels
Information from www.nowfoods.com
PMC8234027
Information from pmc.ncbi.nlm.nih.gov
PMC8129408
Information from pmc.ncbi.nlm.nih.gov
B00KT3H13C
Information from www.amazon.com
Now foods nac 1 000 mg 60 tablets
Information from www.iherb.com
Supplements
Information from www.nowfoods.com
PMC10255663
Information from pmc.ncbi.nlm.nih.gov
227038778892
Information from www.ebay.com
PMC7649937
Information from pmc.ncbi.nlm.nih.gov
PMC10839595
Information from pmc.ncbi.nlm.nih.gov
P
Information from www.swansonvitamins.com
Frequently Asked Questions
Common questions about NOW Extra Strength NAC 1000 mg