Automated research refresh updated the product evidence set.
Before: Evidence 45 · Safety 62 · Effectiveness 53 · Confidence 64
After: Evidence 52 · Safety 62 · Effectiveness 46 · Confidence 68
NOW Supplements N Acetyl Cysteine Vegetarian Capsules
NOW Supplements N Acetyl Cysteine Vegetarian Capsules. Product details are being enriched from the Amazon listing.
Direct product evidence5 papers indexed · 5 claims mapped
Resar evidence panel
0–100 · cited research only
Evidence Score
52
Emerging
Safety Score
62
Good
Effectiveness Score
46
Emerging
Research Confidence
68
Good
Product Fit Score
39
Limited
Bottom line
Limited evidence (Emerging) — treat claims cautiously and review sources directly.
Product fit is weaker — dose, price, or practical use may not align with what studies tested.
Evidence Score
52
Emerging
Price
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Resar may earn an affiliate commission on this purchase. Commissions never change scores — see our affiliate disclosure and conflicts policy. Scores reflect cited research, not medical advice.
Compare others in Medical DevicesTop research
The strongest studies behind this product
Ranked by evidence hierarchy and how closely each study matches this product. Start with the strongest study, then read down. Every claim needs a trail.
Strongest studyHuman RCT92% relevance
110 EFFICACY OF SELENIUM OR N-ACETYL-CYSTEINE, SEPARATELY OR IN COMBINATION IN IMPROVING SEMEN PARAMETERS IN INFERTILE MEN: A DOUBLE BLIND, PLACEBO-CONTROLLED, RANDOMIZED STUDY
Randomized Controlled Trial · European Urology Supplements · 2009
What the research shows
Modest improvement in selected semen quality measures after 12 weeks of daily NAC supplementation.
Direct product evidenceRead study
2345
Indirect evidence68% relevance
Effect of <i>Asparagus falcatus</i> on Acetaminophen Toxicity in Mice: A Comparison of Antioxidative Effect With <i>N</i> -Acetyl Cysteine
Other · Journal of Dietary Supplements · 2008
Category-level evidence
Indirect evidence55% relevance
N-acetyl cysteine (NAC) and COVID-19 treatment: New hopes in old medication
Other · INTERNATIONAL JOURNAL OF MULTIDISCIPLINARY RESEARCH AND ANALYSIS · 2020
Category-level evidence
Indirect evidence51% relevance
N-Acetyl-Cysteine for Treatment of AGA in Men
Other · Case Medical Research · 2019
Category-level evidence
Indirect evidence48% relevance
N-acetyl-cysteine and Insulin Sensitivity in PCOS
Other · Case Medical Research · 2019
Category-level evidence
Scores reflect these cited studies, not medical advice. Expand the full evidence detail below for protocols, dose context, and reported side effects.
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Claim ledger
Every claim, mapped to its source
Each product claim below is tied to a specific paper with study type, match strength, and limitations. Nothing here is medical advice — it is a research trail you can audit.
Claim match reflects how closely a specific paper supports this benefit — not AI confidence or medical certainty.
ClaimEvidence directnessMatchStudy type
Full evidence detail
Study-by-study breakdown
Each paper below is ranked for this listing. Start with the highest match, then expand any study for a plain-language readout.
How to read this section
- Match % - how closely the study matches this product (not overall scientific quality).
- Evidence type - study design (RCT, review, etc.) and whether it is direct, category-level, or indirect.
- What it found - short summary and quoted extract from the paper metadata. Not medical advice.
Direct product evidenceThis study closely matches this product or its active ingredient.
In plain language
The study evaluated oral NAC (600 mg daily) for 12 weeks in infertile men and reported modest improvements in sperm motility and concentration compared with placebo. [1]
What the study reported
Verified extract — not AI generated
“Modest improvement in selected semen quality measures after 12 weeks of daily NAC supplementation.”
How it was used
600 mg NAC taken orally once daily for 12 weeks.
Side effects noted
No adverse effects reported in the indexed studies.
Caveats
Small sample size, limited to male fertility outcomes; does not address broader wellness uses.
Transparency
Score history
Human review is pending for this listing.
Automated research refresh updated the product evidence set.
Before: Evidence 45 · Safety 62 · Effectiveness 53 · Confidence 64
After: Evidence 45 · Safety 62 · Effectiveness 53 · Confidence 64
Reviews
Shopper feedback
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average rating
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