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InstaNatural Niacinamide 5% Face Serum - Vitamin B3 Anti Aging Moisturizer for Skin - Diminishes...
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From InstaNatural
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Report Info:
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Fail Overall Grade
FAIL
Deleted Reviews

FAIL
Unverified Purchases

FAIL
Incentivized Reviews

FAIL
Suspicious Reviewers

FAIL
Reviewer Participation

WARN
Phrase Repetition

PASS
Rating Trend

PASS
Word Count Comparison

PASS
Overlapping Review History

PASS
Reviewer Ease

PASS
Brand Repeats

Most Trusted Reviews
Mar 2, 2017
100%
TRUST
TRUST
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Verified Purchaser
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Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
-
Easy Grader (avg. rating: 4.5)
Least Trusted Reviews
Suffering breakouts and some dark spots on my face, I ... [Go to full review]
Feb 18, 2016
0%
TRUST
TRUST
-
Unverified Purchaser
-
Admitted to receiving an incentive
-
Contains repetitive phrases (
show)
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Take-Back Reviewer (8 deleted Reviews; avg. rating: 4.1)
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Overrepresented Participation (posted 16 Reviews)
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Easy Grader (avg. rating: 4.6)
Analysis Details
Fail
Deleted Reviews

We discovered a total of 342 deleted Reviews for this product, with an average rating of 4.8. 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:
- 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.
- We have no information on reviews that were never published in the first place.
- 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.
Fail
Unverified Purchases

35 of the 82 total reviews for this product are unverified purchases. The unverified purchasers have rated this product an average of 4.6 while the verified purchasers have rated this product an average of 3.8. 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.
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.
Fail
Incentivized Reviews

On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
13 of the 82 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. Incentivized reviews have rated this product an average of 4.9 while reviews that were not incentivized rated this product an average of 4.0. 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.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.
Fail
Suspicious Reviewers

Take-Back Reviewers
35 of the 82 reviewers have had at least one of their past reviews for another product deleted. The Take-Back Reviewers have rated this product an average of 4.6 while the reviewers who don't have any deleted reviews in their history have rated this product an average of 3.8. 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.
Fail
Reviewer Participation

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- 71%
- From reviewers with an overrepresented participation
We see the following 3 participation groups with a statistically significant greater concentration than what we'd expect to see:In total, we found that 58 reviewers (or 71%) are within an overrepresented participation group. These reviews have rated this product an average of 3.9, while all other reviews have rated this product an average of 4.8. 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.
Warn
Phrase Repetition

Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
Common Phrases in Reviews:
Show MoreShow Less
7 reviews
(4.7/5)
(4.7/5)
2 reviews
(4.5/5)
(4.5/5)
5 reviews
(4.2/5)
(4.2/5)
2 reviews
(4.5/5)
(4.5/5)
3 reviews
(4.3/5)
(4.3/5)
3 reviews
(4.7/5)
(4.7/5)
2 reviews
(5.0/5)
(5.0/5)
3 reviews
(5.0/5)
(5.0/5)
3 reviews
(5.0/5)
(5.0/5)
2 reviews
(4.5/5)
(4.5/5)
28 of the 82 total reviews for this product use substantial repetitive phrases between them. This is an excessively large percentage which may indicate unnatural reviews.
Pass
Rating Trend

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- 4%
- Created over 1 day
We counted 82 reviews for this product over the span of 1,236 days, an average of 0.1 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 2 or fewer reviews on any given day.
However, we see the following 1 day exceeding this threshold:In total, we found that 3 reviews were created on just 1 day. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass
Word Count Comparison

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- 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.
Read more about our Word Count Comparison test.
Pass
Overlapping Review History

Reviewers of this product have ALSO reviewed the following products:
13% also reviewed:
Art Naturals Enhanced Retinol Serum 2.5% With %20... by Artnaturals
10% also reviewed:
Art Naturals Thermal Hair Protector 8.0 Oz - Best... by ArtNaturals
9% also reviewed:
Hoont Indoor Powerful Plug-in Pest Repeller with... by Hoont
6% also reviewed:
Item Unavailable by
6% also reviewed:
Item Unavailable by
6% also reviewed:
Art Naturals Organic Beard Oil & Leave-In... by Art Naturals
6% also reviewed:
PurOrganica Hyaluronic Acid Face Serum - Huge 60... by PurOrganica
6% also reviewed:
Item Unavailable by
Does not include products
from the same brand
from the same brand
18 of the 82 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.
Pass
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 4.3, while the average ease score for reviewers in this category is 4.4.
4.3 Product's Average Ease Score
4.4 Category's Average Ease Score
Read more about our Reviewer Ease test.
Pass
Brand Repeats

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