Colgate Optic White Overnight Teeth Whitening Pen, Teeth Stain Remover to Whiten Teeth, 35 Nightly Treatments, 0.08 Fl Oz Amazon Review Analysis (2024)

After just one overnight application my teeth were whiter. This ... [Go to full review]

Jul 15, 2023

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Beyond unsatisfied.It literally does nothing and is a burden to ... [Go to full review]

Sep 1, 2020

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• 57
• Reviews have been deleted

We discovered a total of 57 deleted Reviews for this product, with an average rating of 4.3. 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 our Deleted Reviews test.

Show distribution of deleted reviews

Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.

Common Phrases in Titles:

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• 

• ~55%
• Used substantial repetitive phrases

Approximately 55% of reviews use substantial repetitive phrases between them. These reviewers have rated this product an average of

while reviews without substantial repetitive phrases rated this product an average of

. 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 Phrase Repetition test.

Reviewers of this product have ALSO reviewed the following products:

• 

• <10%
• Substantial overlapping review history

Less than approximately 10% of reviewers have substantial overlapping product review history. These reviewers have rated this product an average of

while the reviewers who have a more unique product review history rated this product an average of

. 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 Overlapping Review History test.

• 

• <10%
• Created on high-volume days

We didn't notice any signals that would indicate reviews were created unevenly over time.
Read more about our Rating Trend test.

• 

• 0%
• Unverified Purchases

of the

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.

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.

• 

• <10%
• Have an overrepresented word count

• 

• <10%
• have zero verified purchases

Less than approximately 10% of reviewers have never written a verified purchase review. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.

• 

• ~20%
• have previously deleted reviews

Approximately 20% of reviewers have had at least one of their past reviews for another product deleted. 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 Reviewer Ease test.

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

• 

• <10%
• Admitted to receiving an incentive

We didn't detect any reviews that used language indicating they were incentivized.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.