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NovaVita All Natural Milk Thistle - 120 Capsules | Antioxidants & Liver Support - Maximum Silymarin...
More product info From NovaVita Naturals

Amazon Reviews for NovaVita All Natural Milk Thistle - 120 Capsules | Antioxidants & Liver Support - Maximum Silymarin Extract 30:1 Ratio, 175 mg per Capsule | GMP Certified & Made in the USA
Rating:
14 Reviews
64% of potentially unnatural reviews removed (Why?)
Adjusted:
View/Edit Adjustment
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Report Info:

Report Card

Warn Overall Grade
FAIL Deleted Reviews
FAIL Brand Repeats
FAIL Suspicious Reviewers
FAIL Reviewer Ease
WARN Rating Trend
WARN Unverified Purchases
WARN Incentivized Reviews
WARN Phrase Repetition
PASS Word Count Comparison
PASS Overlapping Review History
PASS Reviewer Participation

Most Trusted Reviews

Works good [Go to full review]
Jun 25, 2016      
95% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 4.7)


Least Trusted Reviews

I bought this natural supplement unsure of its nutritional value. ... [Go to full review]
Nov 15, 2015      
0% TRUST
  • Unverified Purchaser
  • Brand Loyalist (2 of 3 reviews for this brand; avg rating: 5.0)
  • Easy Grader (avg. rating: 5.0)


Analysis Details

Fail Deleted Reviews

We discovered a total of 55 deleted reviews for this product, with an average rating of 4.6. Even though deleted reviews don't affect the average rating, the fact that action was taken to delete reviews raises some red flags about the integrity of the reviews for the product as whole.

There are a few limitations to keep in mind regarding the Deleted Reviews test:
  1. We don't have a magic ability to collect every single deleted review; we can only identify reviews as deleted if we collect them on one date and then notice they are no longer visible on a subsequent date.
  2. We have no information on reviews that were never published in the first place.
  3. We also don't know why these reviews were removed. It could be action from the platform, personal decision by the review author, part of an entire account closure, even some data error on our part, etc.
Read more about the Deleted Reviews test here.

4.6 average rating of deleted reviews

4.6


Show distribution of deleted reviews

Fail Brand Repeats

Brand Monogamists


2 of the 14 reviewers have reviewed multiple products, but only for this brand. This is an excessively large percentage of Brand Monogamists which may indicate unnatural reviews.

from Brand Monogamists

from Non-Monogamists


5.0
4.8


Read more about our Brand Repeats test.

Fail Suspicious Reviewers

One-Hit Wonders


2 of the 14 reviewers have only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, the discrepancy in ratings between the One-Hit Wonders and reviewers who have posted more than one review isn't significant enough to rule out the possibility of it being due to random chance.

from one-hit wonders

from reviewers with more than one review


5.0
4.8


Never-Verified Reviewers


3 of the 14 reviewers have never written a verified purchase review. While this is more Never-Verified Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from never-verified reviewers

from reviewers with at least one verified purchase review


4.7
4.9


Take-Back Reviewers


7 of the 14 reviewers have had at least one of their past reviews for another product deleted. This is an excessively large percentage of Take-Back Reviewers which may indicate unnatural reviews.

from take-back reviewers

from reviewers without previously deleted reviews


4.7
5.0


Read more about our Suspicious Reviewers test.

Fail Reviewer Ease
The ease score is the average rating for all reviews that a given reviewer submits. The average ease score for reviewers of this product is 4.8, while the average ease score for reviewers in this category is 4.3. Based on our statistical modeling, the discrepancy in average rating between these two groups is significant enough to believe that the difference is not due to random chance, and may indicate that there are unnatural reviews.

4.8 Product's Average Ease Score

4.3 Category's Average Ease Score


4.8
4.3


Read more about our Reviewer Ease test.


Warn Rating Trend

  • 14%
  • Created over 1 day

We counted 14 reviews for this product over the span of 495 days, an average of 0.0 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 1 or fewer reviews on any given day.

However, we see the following 1 day exceeding this threshold:In total, we found that 2 reviews were created on just 1 day. Although any days with a larger number of reviews than expected is suspicious, the discrepancy in ratings from reviews created on these high volume days and reviews created on other days isn't significant enough to rule out the possibility of it being due to random chance.

from reviews created on high volume days

from reviews created on normal volume days


5.0
4.8


Read more about our Rating Trend test.

Warn Unverified Purchases

9 of the 14 total reviews for this product are unverified purchases. While this is a higher percentage of unverified purchases than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from unverified purchasers

from verified purchases


4.8
5.0


Unverified purchases may be the result of Kindle Unlimited readers, buyers who didn't pay full price, or reviewers who did not purchase the product at Amazon. Read more about our Unverified Purchases test.

Warn Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.


5 of the 14 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. This is an excessively large percentage of incentivized reviews which may indicate unnatural reviews.

from incentivized reviews

from non-incentivized reviews


4.8
4.9


Read more about our Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.

Warn Phrase Repetition


2 of the 14 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.

from reviews with substantial repetitive phrases

from reviews without substantial repetitive phrases


4.5
4.9


Read more about our Phrase Repetition test.

Pass Word Count Comparison

  • 0%
  • Have an overrepresented word count
We didn't find any review word count groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Word Count Comparison test.

Pass Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:

Does not include products
from the same brand


4 of the 14 reviewers have substantial overlapping product review history. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from reviewers with substantial overlapping history

from reviewers without a substantial overlapping history


4.8
4.9


Read more about our Overlapping Review History test.

Pass Reviewer Participation

  • 0%
  • From reviewers with an overrepresented participation
We didn't find any participation groups that had a statistically significant greater concentration than what we'd expect to see in this category.
Read more about our Reviewer Participation test.


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