What percentage of reviews are fake for this product?

42.00% of the analyzed reviews appear to be fake or inauthentic.

What is the authenticity grade for this product?

The product receives a grade of D based on review authenticity analysis.

How many reviews were analyzed?

15 reviews were analyzed for authenticity patterns.

What is the adjusted rating after removing fake reviews?

After removing suspicious reviews, the adjusted rating is 3.80 out of 5 stars.

How does this analysis help consumers?

This analysis helps consumers identify products with manipulated reviews, enabling more informed purchasing decisions based on genuine customer feedback.

Is this product priced fairly on Amazon?

Based on AI price analysis, this product is Unable to compare.

How is this product positioned in the market?

This product is positioned as a Mid-range option in its category.

NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules

Name: NOW Supplements, NAC (N-Acetyl Cysteine) 600 mg with Selenium, 250 Veg Capsules
Brand: Amazon
SKU: B0013OUQ3S
Availability: InStock
Rating: 3.8 (15 reviews)

ASIN: B0013OUQ3S

Analysis Date: Nov 18, 2025

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Review Analysis Results

Authenticity Grade

42.00%

Fake Reviews

4.80

Original Rating

3.80

Adjusted Rating

Analysis Summary

This product shows moderate signs of review manipulation with several concerning patterns. While many reviews appear genuine, there's a suspicious concentration of 5-star ratings (14 out of 16 reviews) with limited critical feedback. Several reviews exhibit hallmark characteristics of inauthentic content: overly enthusiastic language ('miracle product'), generic praise without specific details, and reviews that reference other reviews in a promotional manner. The presence of multiple reviews with medical claims and dramatic health improvements raises authenticity concerns. However, the mix of detailed, balanced reviews and some verified purchase indicators provides some credibility. The product appears to have legitimate users but likely also contains incentivized or artificial reviews.

Review Statistics

19,518

Total Reviews on Amazon

-1.00

Rating Difference

Price Analysis

NOW Supplements typically offers solid value in the mid-range supplement market. Check current Amazon pricing against other reputable retailers like iHerb or Vitacost before purchasing. Given the high rating (4.8/5), this appears to be a well-regarded product worth considering at competitive pricing.

MSRP Assessment

Estimated MSRP: Unknown

Source: Unable to determine

Amazon Price: Unable to compare

Market Position

Positioning: Mid-range

Alternatives Range: $25-$45 for 250 capsules of NAC supplements

Value: NOW is a trusted mid-tier brand offering good quality at reasonable prices compared to premium brands like Thorne or Jarrow Formulas.

Buying Tips

Best Time to Buy: Best prices often occur during Amazon Prime Day, Black Friday, or January wellness sales.

Deal Indicators: Look for Subscribe & Save discounts (typically 5-15% off), coupon clip offers, or bundled deals with other supplements.

Watch For: Watch for third-party sellers charging significantly above typical market prices or unusually low prices from new sellers with few reviews.

Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Dec 1, 2025

Understanding This Analysis

What does Grade D mean?

This product has significant review authenticity issues. Many reviews show patterns consistent with fake or incentivized reviews. Exercise caution.

Adjusted Rating Explained

The adjusted rating (3.80 stars) represents what we estimate this product's rating would be if fake reviews were removed. This product's adjusted rating is lower than Amazon's displayed rating (4.80 stars), suggesting positive fake reviews may be inflating the score.

How We Detect Fake Reviews

Our AI analyzes multiple factors: language patterns (generic vs. specific), reviewer behavior (history, timing), temporal anomalies (review clusters), verification status, sentiment authenticity, and statistical outliers. No single factor determines a review is fake - we look at the combination of signals.

Important Limitations

No automated system is perfect. Sophisticated fake reviews can evade detection, and some genuine reviews may be incorrectly flagged. Use this analysis as one data point in your purchasing decision, not the only factor. Reading actual review content yourself is always valuable.