English version in progress: interface and data are in English; some explanatory text is still in Chinese.
Best N-Acetyl cysteine (NAC) products by transparent scoring (2026)
Single-ingredient products scored by public rules: dose fit, label transparency, data verification, company transparency, third-party testing. Not a measure of efficacy or safety. No paid placement.
Products ranked: 123 · Reference range: 150 – 600 mg (source) · Updated 2026-10-30
Dose fit 40 · Label transparency 20 · Data verification 15 · Company transparency 15 · Third-party test 10 — Methodology · N-Acetyl cysteine (NAC) →
| Rank | Product | Per day | Score | Breakdown | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 tie |
N-Acetyl Cysteine Nature's Sunshine · US NIH DSLD |
600 mg | 90.0 | Breakdown
|
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| 1 tie |
N-Acetyl Cysteine 600 mg Swanson · US NIH DSLD |
600 mg | 90.0 | Breakdown
|
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| 1 tie |
NAC N-Acetyl Cysteine XYMOGEN · US NIH DSLD |
600 mg | 90.0 | Breakdown
|
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| 4 tie |
N-Acetyl-L-Cysteine NAC 600 mg GNC · US NIH DSLD |
600 mg | 88.0 | Breakdown
|
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| 4 tie |
NAC (N-Acetyl-Cysteine) Twinlab · US NIH DSLD |
600 mg | 88.0 | Breakdown
|
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| 4 tie |
NAC 600 mg The Vitamin Shoppe · US NIH DSLD |
600 mg | 88.0 | Breakdown
|
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| 4 tie |
NAC N-Acetyl Cysteine 600 mg Vitamin World · US NIH DSLD |
600 mg | 88.0 | Breakdown
|
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| 8 | NAC N-Acetyl-L-Cysteine 600 mg Puritan's Pride · US NIH DSLD |
600 mg | 85.0 | Breakdown
|
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| 9 tie |
N-Acetyl Cysteine 600 mg Puritan's Pride · US NIH DSLD |
600 mg | 83.0 | Breakdown
|
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| 9 tie |
NAC (N-Acetyl-L-Cysteine) 600 mg Solgar · US NIH DSLD |
600 mg | 83.0 | Breakdown
|
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| 9 tie |
NAC 500 mg Bluebonnet · US NIH DSLD |
500 mg | 83.0 | Breakdown
|
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| 9 tie |
NAC 600 mg Solgar · US NIH DSLD |
600 mg | 83.0 | Breakdown
|
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| 13 tie |
Cysteplus Thorne Research, Inc. · Health Canada LNHPD |
500 mg | 79.0 | Breakdown
|
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| 13 tie |
N-Acetyl-L-Cysteine (NAC) Jarrow Formulas Inc. · Health Canada LNHPD |
500 mg | 79.0 | Breakdown
|
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| 13 tie |
NAC 600 mg Pure Encapsulations · Health Canada LNHPD |
600 mg | 79.0 | Breakdown
|
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| 16 tie |
N-Acetyl Cysteine NHC Natural Healthy Concepts · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl Cysteine Ortho Molecular Products · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl Cysteine 600 mg VitaCeutical Labs · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl Cysteine 600 mg Natural Nutra · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl Cysteine N.A.C. w/Liver Safeguard 1000 mg Remedys Nutrition · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl L-Cysteine 600 mg Vitacost · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl-L-Cysteine 500 Milligrams Montiff · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 16 tie |
N-Acetyl-L-Cysteine 600 mg Roex · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC Pure Nootropics · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC (N-Acetyl-L-Cysteine 600 mg Nature's Blend · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC 600 mg Sports Research · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC 600 mg Nature's Edge · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC N-Acetyl L-Cysteine Capsules 600 mg BulkSupplements.com · US NIH DSLD |
600 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC N-Acetyl-L-Cysteine 500 mg Groovy Bee · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 16 tie |
NAC-500 N-Acetyl Cysteine ProCaps Laboratories · US NIH DSLD |
500 mg | 75.0 | Breakdown
|
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| 31 tie |
N-Acetyl Cysteine 600 mg Good 'N Natural · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 31 tie |
N-Acetyl Cysteine 600 mg Source Naturals · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 31 tie |
N-Acetyl Cysteine 600 mg PhysioLogics · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 31 tie |
N-Acetyl L-Cysteine (NAC) Powder Herbadiet · US NIH DSLD |
500 mg | 73.0 | Breakdown
|
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| 31 tie |
NAC 600 mg tnvitamins · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 31 tie |
NAC N-Acetyl-L-Cysteine 600 LifeLink · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 31 tie |
NAC N-Acetyl-L-Cysteine 600 mg Natural Factors · US NIH DSLD |
600 mg | 73.0 | Breakdown
|
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| 38 tie |
AVAN-D NAC 600mg Capsule PAHANG PHARMACY SDN. BHD. · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
AVO Avomucil NAC 200mg Powder Abio Marketing Sdn Bhd · Malaysia NPRA |
200 mg | 69.0 | Breakdown
|
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| 38 tie |
AVO Avomucil NAC 600mg Powder Abio Marketing Sdn Bhd · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
Bio Activ NACLEAR N-ACETYL-L-CYSTEINE 600mg Capsule BIO TREE PHARMACEUTICAL (INT`L) SDN. BHD. · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
Biomerit Aireze Capsule Biomerit · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
Biotective NAC 600mg Capsule BIO-SCIENCE MARKETING SDN. BHD. · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
DSY NAC 400MG CAPSULE CTA NUTRICEUTICALS (ASIA) SDN BHD · Malaysia NPRA |
400 mg | 69.0 | Breakdown
|
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| 38 tie |
DUO LEAF NAC 200mg Powder (Grape Flavour) STELLAR BIO SDN BHD · Malaysia NPRA |
200 mg | 69.0 | Breakdown
|
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| 38 tie |
Dissoflam Capsule INNOCEUTICAL SDN BHD · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
ELDON DX MUCOWAY TABLET Eldon · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
EXCELAB NAC 300MG CAPSULE Excelab · Malaysia NPRA |
300 mg | 69.0 | Breakdown
|
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| 38 tie |
Genestra Brands Amino NAC | 500 mg | 69.0 | Breakdown
|
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| 38 tie |
JH Nutrition Nacous Capsule JASE HEALTHCARE SDN. BHD. · Malaysia NPRA |
300 mg | 69.0 | Breakdown
|
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| 38 tie |
MUCOGO NAC 200mg Effervescent Powder QUANTUM UPSTREAM SDN. BHD. · Malaysia NPRA |
203 mg | 69.0 | Breakdown
|
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| 38 tie |
MUXINAC TABLET SBL HEALTHCARE SDN BHD · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
MegaLive Mucokof NAC 600mg Powder MegaLive · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
N-Acetyl-L-Cysteine The Bird and Be Co. Inc. · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
|
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| 38 tie |
N-Acetyl-L-Cysteine 500 mg FoodScience, LLC · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
|
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| 38 tie |
N.A.C Advanced Orthomolecular Research Inc. · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
|
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| 38 tie |
N.A.C Sustained Advanced Orthomolecular Research Inc. · Health Canada LNHPD |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
NAC Wholesome Story LLC · Health Canada LNHPD |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
NAC A.N. Tyler Holdings Ltd. · Health Canada LNHPD |
500 mg | 69.0 | Breakdown
|
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| 38 tie |
NAC Sports Research · Health Canada LNHPD |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
NAC CODEAGE LLC · Health Canada LNHPD |
450 mg | 69.0 | Breakdown
|
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| 38 tie |
NAC 600 mg | 600 mg | 69.0 | Breakdown
|
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| 38 tie |
Nova NAC N-Acetyl-L-Cysteine 300mg Capsule Nova · Malaysia NPRA |
300 mg | 69.0 | Breakdown
|
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| 38 tie |
natural Factors NAC N-Acetyl-L-Cysteine 600mg Vegetable Capsule Natural Factors · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 38 tie |
vissom nutrition NAC 600mg Capsule Vissom Nutrition · Malaysia NPRA |
600 mg | 69.0 | Breakdown
|
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| 66 | MUCOGO NAC 100mg Effervescent Powder QUANTUM UPSTREAM SDN. BHD. · Malaysia NPRA below_ref |
102 mg | 56.1 | Breakdown
|
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| 67 | NAC XYMOGEN · US NIH DSLD above_upper |
2,400 mg | 47.0 | Breakdown
|
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| 68 | NAC N-Acetyl-L-Cysteine Allergy Research Group · US NIH DSLD above_upper |
1,500 mg | 45.0 | Breakdown
|
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| 69 | NAC Carlson · US NIH DSLD above_upper |
1,500 mg | 43.0 | Breakdown
|
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| 70 | NAC N-Acetyl Cysteine 750 mg Country Life · US NIH DSLD above_upper |
750 mg | 42.0 | Breakdown
|
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| 71 tie |
N-Acetyl Cysteine Physician's Preference · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl Cysteine 500 mg DaVinci Laboratories Of Vermont · US NIH DSLD above_upper |
2,000 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl L-Cysteine BulkSupplements.com · US NIH DSLD above_upper |
1,800 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl L-Cysteine (NAC) BulkSupplements.com · US NIH DSLD above_upper |
1,800 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl L-Cysteine 600 mg BulkSupplements.com · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl-L-Cysteine 500 mg Klaire Labs · US NIH DSLD above_upper |
1,000 mg | 35.0 | Breakdown
|
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| 71 tie |
N-Acetyl-L-Cysteine 500 mg Neurobiologix · US NIH DSLD above_upper |
1,000 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC NutraBio · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC (N-Acetyl Cysteine) 600 mg Best Naturals · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC (N-Acetyl-Cysteine) 600 mg Swiss BioEnergetics · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC (N-Acetyl-l-Cysteine) 600 mg Vital Nutrients · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC 600 Milligrams NutraBio · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC 600 mg Wholesome Story · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC 600 mg Patient One 1 MediNutritionals · US NIH DSLD above_upper |
1,800 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC N-Acetyl Cysteine NuMedica · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC N-Acetyl Cysteine 600 mg California Academy of Health · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC N-Acetyl L-Cysteine Hard Rhino · US NIH DSLD above_upper |
1,200 mg | 35.0 | Breakdown
|
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| 71 tie |
NAC N-Acetyl-L-Cysteine NutriCology · US NIH DSLD above_upper |
1,500 mg | 35.0 | Breakdown
|
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| 89 tie |
N-Acetyl-L-Cysteine 600 mg Life Extension · US NIH DSLD above_upper |
1,800 mg | 33.0 | Breakdown
|
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| 89 tie |
NAC Integrative Therapeutics · US NIH DSLD above_upper |
1,200 mg | 33.0 | Breakdown
|
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| 89 tie |
NAC N-Acetyl-L-Cysteine 500 mg Natural Factors · US NIH DSLD above_upper |
1,500 mg | 33.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine Source Naturals · US NIH DSLD above_upper |
2,000 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine Moss Nutrition · US NIH DSLD above_upper |
700 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine 1000 mg Double Wood Supplements · US NIH DSLD above_upper |
1,000 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine 1800 mg SuperSmart · US NIH DSLD above_upper |
1,800 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine 600 mg SuperSmart · US NIH DSLD above_upper |
1,800 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl Cysteine 750 mg LifeSeasons Essentials · US NIH DSLD above_upper |
750 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl L-Cysteine (NAC) Herbadiet · US NIH DSLD above_upper |
1,600 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl-L-Cysteine Karuna · US NIH DSLD above_upper |
1,000 mg | 32.0 | Breakdown
|
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| 92 tie |
N-Acetyl-L-Cysteine 1600 mg NaturaLife Labs · US NIH DSLD above_upper |
1,600 mg | 32.0 | Breakdown
|
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.