What percentage of reviews are fake for this product?

15.00% of the analyzed reviews appear to be fake or inauthentic.

What is the authenticity grade for this product?

The product receives a grade of B 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 4.60 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, Vitamin D-3 & K-2, 1,000 IU/45 mcg,Plus Cardiovascular Support, Supports Bone Health, 120 veg Capsules

Name: NOW Supplements, Vitamin D-3 & K-2, 1,000 IU/45 mcg,Plus Cardiovascular Support*, Supports Bone Health*, 120 veg Capsules
Brand: Amazon
SKU: B0019QT9LA
Availability: InStock
Rating: 4.6 (15 reviews)

ASIN: B0019QT9LA

Analysis Date: Jan 11, 2026 (re-analyzed Jan 11, 2026)

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Review Analysis Results

Authenticity Grade

15.00%

Fake Reviews

4.93

Original Rating

4.60

Adjusted Rating

Analysis Summary

The majority of these reviews appear genuine, with approximately 85% showing authentic characteristics. All reviews are verified purchases, which significantly increases their credibility. The product receives overwhelmingly positive feedback, which is normal for a quality supplement from a reputable brand like NOW. Most reviewers provide specific personal experiences, dosage observations, and contextual details that align with genuine user feedback.

Strong evidence of authenticity includes detailed personal narratives like Review 1 describing improved energy and mood after weeks of use, Review 2 discussing the gentle dosage and combination benefits for bone and heart health, and Review 3 mentioning specific life circumstances (41-year-old skin, weight loss). Review 4 offers particularly detailed analysis comparing this product's dosage to others on the market, demonstrating genuine product knowledge. Review 6 provides practical insight about pill consolidation and managing vitamin deficiencies.

Some concerns exist with a small subset of reviews that show manipulation patterns. Review 5 is extremely brief with generic praise, Review 8 is just "Delighted with the article" which appears copied, and Reviews 9-11 contain minimal content in different languages that could be template responses. Review 14 contains marketing-like language about vitamin D's benefits that reads more like product description than personal experience.

Overall, this appears to be a well-regarded product with mostly authentic user feedback. The few suspicious reviews represent a small minority and don't indicate systematic manipulation. The detailed, personal reviews significantly outweigh the generic ones, suggesting genuine customer satisfaction rather than coordinated review manipulation.

Key patterns identified in the review analysis include: Verified purchase status for all reviews, Detailed personal health narratives in majority of reviews, Small subset of extremely brief, generic reviews.

Review Statistics

11,359

Total Reviews on Amazon

-0.33

Rating Difference

Price Analysis

NOW Supplements typically offers solid mid-range value in the vitamin market. With excellent ratings (4.93/5), this product likely represents good quality for price. Check current Amazon price against other retailers like iHerb or Vitacost, and consider Subscribe & Save if you use it regularly.

MSRP Assessment

Estimated MSRP: $25.99

Source: Brand typical pricing

Amazon Price: Unable to compare

Market Position

Positioning: Mid-range

Alternatives Range: $15-$40

Value: NOW offers good quality at reasonable prices compared to premium brands like Thorne or Pure Encapsulations, while maintaining better quality control than budget brands.

Buying Tips

Best Time to Buy: Vitamin D supplements often see discounts in fall/winter when demand increases.

Deal Indicators: Look for Subscribe & Save discounts, coupon checkboxes, or multi-bottle bundles for better value.

Watch For: Watch for third-party sellers charging significantly above typical Amazon price; verify seller is 'Ships from Amazon' for authenticity.

Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Jan 11, 2026

Understanding This Analysis

What does Grade B mean?

This product has good review authenticity with minor concerns. While most reviews appear genuine, we detected some patterns that warrant mild caution.

Adjusted Rating Explained

The adjusted rating (4.60 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 (4.93 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.