Nutrex Hawaii, Pure Hawaiian Spirulina 500 mg, Vegan, Supports Immune System, Heart, Cells and Energy, 400 Tablets

Nutrex Hawaii, Pure Hawaiian Spirulina 500 mg, Vegan, Supports Immune System, Heart, Cells and Energy, 400 Tablets

ASIN: B0039ITKSI
Analysis Date: Dec 8, 2025 (re-analyzed Dec 8, 2025)

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Review Analysis Results

D
Authenticity Grade
42.00%
Fake Reviews
4.47
Original Rating
3.50
Adjusted Rating

Analysis Summary

This product shows a moderate level of suspicious reviews, scoring 42 on the fake percentage scale. The overall rating distribution is heavily skewed toward 5-star reviews (11 out of 15 reviews), with only 4 reviews rated 3 stars and no 1-2 star reviews, creating an unnatural distribution pattern. The verified purchase rate is 100% (all reviews marked 'V'), which is unusually high compared to typical Amazon products. Several reviews contain identical or nearly identical content, particularly review #3 and #6 which are exact duplicates, indicating potential manipulation.

Specific language patterns raise concerns about authenticity. Review #2 begins with 'SPIRULINA RESEARCH 1/17/14' followed by what appears to be a research-style description rather than personal experience. Review #13 contains an unusually detailed medical claim: 'I just got my results back from my hair test mineral analysis... It checks for mineral imbalances as well as heavy metals in your body.' Review #14 follows a common fake review template: 'One of many friends told me about this product. I'm very pleased with it.' These patterns suggest some reviews may be manufactured rather than organic.

Review authenticity indicators show mixed signals. Positive indicators include specific complaints in 3-star reviews about glass shards (#10), short expiration dates (#9), and product expectations (#5). However, concerning patterns include repetitive language ('feels good to my body' appears in #4 and #7), vague emotional claims without specific benefits (#14), and the duplicate review (#3 and #6). The timing appears normal without obvious clustering, but the content duplication is a significant red flag for review manipulation.

Key concerns include the duplicate review content, unnatural 5-star concentration, and several reviews containing formulaic language common in incentivized reviews. Positive indicators include genuine-sounding negative reviews with specific complaints and some detailed positive reviews that mention actual usage patterns. The product appears to have legitimate customers but likely also has some manipulated reviews boosting its overall rating, placing it in the moderate suspicion range where approximately 40-50% of reviews may be inauthentic.

Key patterns identified in the review analysis include: Duplicate review content, Research-style descriptions rather than personal experience, Vague emotional claims without specific benefits.

Review Statistics

7,625
Total Reviews on Amazon
-0.97
Rating Difference

Price Analysis

Nutrex Hawaiian Spirulina is a mid-range, well-reviewed supplement in the spirulina market. Without the current Amazon price, compare it to the typical $15-$60 range for similar products. Look for Subscribe & Save or wait for wellness-focused sales events for the best deal.

MSRP Assessment

Estimated MSRP: $35.00
Source: Brand typical pricing
Amazon Price: Unable to compare

Market Position

Positioning: Mid-range
Alternatives Range: $15-$60
Value: Offers good value with 400 tablets at 500mg potency from a reputable Hawaiian brand, though generic spirulina can be cheaper.

Buying Tips

Best Time to Buy: Best prices often around New Year (wellness resolutions) or Amazon Prime Day.
Deal Indicators: Subscribe & Save discount, price below $25, or bundled with other supplements.
Watch For: Watch for third-party sellers charging significantly above $35 or unusually low prices that may indicate expired stock.
Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Dec 8, 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 (3.50 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 (4.47 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.

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