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Biotin From Natrol Report Feedback

Warn Unnatural reviews possible

Original:

12 Reviews

Adjusted:

7 Reviews

79%
89%

View/Edit Adjustment
How is this calculated?
Report Last Updated: Jul 19, 2017

Report Card

Click a test to jump to details

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

Other analysis for this product:


Original:

104 Reviews


Adjusted:

84 Reviews

Biotin 1000 Mcg, 100 tab (Pack - 3) From Natrol

Pass Reviews appear natural


Original:

2 Reviews


Adjusted:

2 Reviews

Biotin (10,000mcg) Maximum Strength From Natrol

Warn Unnatural reviews possible


Original:

7,182 Reviews


Adjusted:

3 Reviews

Natrol Biotin Max 10000mcg From Natrol

Fail Unnatural reviews detected


Original:

73 Reviews


Adjusted:

30 Reviews

Natrol Melatonin FD Supplement From Natrol

Pass Reviews appear natural


Original:

1,719 Reviews


Adjusted:

1,495 Reviews


Original:

26 Reviews


Adjusted:

25 Reviews


Original:

1,044 Reviews


Adjusted:

862 Reviews


Original:

48 Reviews


Adjusted:

48 Reviews

Natrol Biotin Maximum Strength 100 Tablets From Natrol

Warn Unnatural reviews possible


Original:

254 Reviews


Adjusted:

160 Reviews


Original:

65 Reviews


Adjusted:

48 Reviews


Original:

19 Reviews


Adjusted:

3 Reviews

Most Trusted Reviews

10/10
Big difference in my nails! Love it! [Go to full review]
Aug 19, 2016      
100% TRUST
  • Verified Purchaser
  • Easy Grader (avg. rating: 9.6)


Least Trusted Reviews

8/10
Helps my finger and toe nails grow a lot faster ... [Go to full review]
Jan 21, 2017      
45% TRUST
  • Verified Purchaser
  • One-Hit Wonder
  • Critical Reviewer (avg. rating: 8.0)


Analysis Details

Note: While Bodybuilding.com claims 12 reviews, we counted 10 available on their site.

Fail Deleted Reviews

We discovered a total of 1 deleted review for this product, with an average rating of 9. 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.

9.0 average rating of deleted reviews

9.0


Show distribution of deleted reviews

Fail Suspicious Reviewers

One-Hit Wonders


1 of the 10 reviewers has only reviewed this product. While this is more One-Hit Wonders than we'd expect to see, it does not appear to have a significant impact on the overall rating.

from one-hit wonders

from reviewers with more than one review


8.0
9.8


Take-Back Reviewers


4 of the 10 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


9.8
9.5


Single-Day Reviewers


3 of the 10 reviewers have written multiple reviews but posted all of them on a single day. This is an excessively large percentage of Single-Day Reviewers which may indicate unnatural reviews.

from single-day reviewers

from non-single-day reviewers


9.7
9.6


Read more about our Suspicious Reviewers test.

Warn 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 9.3, while the average ease score for reviewers in this category is 8.8. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.

9.3 Product's Average Ease Score

8.8 Category's Average Ease Score


9.3
8.8


Read more about our Reviewer Ease test.


Pass Rating Trend

  • 0%
  • Created on high-volume days
We counted 10 reviews for this product over the span of 908 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. We didn't find any days exceeding this threshold.
Read more about our Rating Trend test.

Pass Unverified Purchases

1 of the 10 total reviews for this product are unverified purchases. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

from unverified purchasers

from verified purchases


9.0
9.7


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.

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 Phrase Repetition
  • 0%
  • Used substantial repetitive phrases
0 of the 10 total reviews for this product use substantial repetitive phrases between them. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Read more about our Phrase Repetition test.

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

30% also reviewed:
Alpha Amino by Cellucor

20% also reviewed:
ISO100 by Dymatize

20% also reviewed:
Liquid Grip by Liquid Grip

20% also reviewed:
COR-Performance Whey by Cellucor

20% also reviewed:
High Protein Spread by P28

Does not include products
from the same brand


4 of the 10 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


9.8
9.5


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.

Pass Brand Repeats

Brand Repeaters

We didn't detect a substantial amount of Brand Repeaters.

Pass Sample Reviews
  • 0%
  • Mentioned the word "Sample"
We didn't find the word "sample" used in any reviews
Read more about our Sample Reviews test.


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