Close
Deva Vegan Vitamins B-12 1000mcg with Folic Acid & B-6, Fast Dissolve - Fast Dissolve, 90...
More product info
From DEVA
This report was last updated 8/4/2021.
Refresh the report to view the most up-to-date data available:
Refresh the report to view the most up-to-date data available:
View/Edit Adjustment
Jump to Report Card
Report Info:
Note: While Amazon.com claims 2,295 Ratings, we counted 273 Reviews available on their site.
Note: We only analyze "reviews" and ignore one-tap "ratings".
Note: We only analyze "reviews" and ignore one-tap "ratings".
Report Card
Warn Overall Grade
FAIL Word Count Comparison
FAIL Overlapping Review History
WARN Deleted Reviews
WARN Suspicious Reviewers
WARN Reviewer Ease
WARN Reviewer Participation
PASS Rating Trend
PASS Unverified Purchases
PASS Phrase Repetition
PASS Brand Repeats
PASS Incentivized Reviews
Most Trusted Reviews
Sure you get 90, but they taste so foul I ... [Go to full review]
Oct 15, 2019
100%
TRUST
TRUST
- Verified Purchaser
- Take-Back Reviewer (3 deleted Reviews; avg. rating: 4.7)
- Critical Reviewer (avg. rating: 3.8)
Least Trusted Reviews
I just love this stuff [Go to full review]
Aug 18, 2017
0%
TRUST
TRUST
- Verified Purchaser
- Overrepresented word count (6 words)
- Take-Back Reviewer (1 deleted Review; avg. rating: 5.0)
- Brand Repeater (2 of 76 reviews for this brand; avg rating: 5.0)
- Overlapping Review History: reviewed 2 of 9 top products
- Easy Grader (avg. rating: 4.8)
Analysis Details
Fail Word Count Comparison
-
- 33%
- Have an overrepresented word count
In the graph above, we can see the distribution of review word counts for this product and the expected distribution for this category. We see the following 1 group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 89 reviews (or 33%) are within an overrepresented word count group. These reviews have rated this product an average of 4.8, while all other reviews have rated this product an average of 4.5. 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 Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
4% also reviewed:
DEVA Vegan Vitamin B12 Fast Dissolve Supplement -... by Deva Vegan Vitamins
3% also reviewed:
Deva Vegan Vitamin D2 60 mcg 2400 IU,... by Deva Vegan Vitamins
2% also reviewed:
Deva Vegan Multivitamin, Mineral Supplement, Tiny... by Deva Vegan Vitamins
2% also reviewed:
The Hunger Games Trilogy by Suzanne Collins
2% also reviewed:
Doctor's Best Best Vegan D3 Vegetarian... by Doctor's Best
2% also reviewed:
Sports Research Vegan Biotin 2500mcg with Organic... by Sports Research
1% also reviewed:
Garden of Life Organics Vegan Vitamin D3 Chewable... by Garden of Life
Does not include products
from the same brand
from the same brand
41 of the 273 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.8 while the reviewers who have a more unique product review history rated this product an average of 4.5. 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 Deleted Reviews
We discovered a total of 4 deleted Reviews for this product, with an average rating of 2.5. 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.
Warn Suspicious Reviewers
Take-Back Reviewers
130 of the 273 reviewers have had at least one of their past reviews for another product deleted. While this is more Take-Back Reviewers than we'd expect to see, it does not appear to have a significant impact on the overall rating.
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 4.4, while the average ease score for reviewers in this category is 4.3. While this discrepancy is rather large, it is not quite large enough to rule out the possibility of it being due random chance.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Warn Reviewer Participation
-
- 30%
- From reviewers with an overrepresented participation
We see the following 1 participation group with a statistically significant greater concentration than what we'd expect to see:In total, we found that 83 reviewers (or 30%) are within an overrepresented participation group. While this is more reviews from overrepresented participation groups than we'd expect to see, these reviews do not appear to have a significant impact on the overall rating.
Pass Rating Trend
-
- 2%
- Created over 2 days
We counted 273 reviews for this product over the span of 3,347 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 2 days exceeding this threshold:In total, we found that 6 reviews were created on just 2 days. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Unverified Purchases
7 of the 273 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.
Pass 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
11 reviews
(4.8/5)
(4.8/5)
4 reviews
(5.0/5)
(5.0/5)
3 reviews
(5.0/5)
(5.0/5)
2 reviews
(5.0/5)
(5.0/5)
Common Phrases in Titles:
4 reviews
(4.8/5)
(4.8/5)
11 of the 273 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.
Pass Brand Repeats
Brand Repeaters
38 of the 273 reviewers have reviewed other products for this brand. This is within an acceptable range and it does not appear to be significantly affecting the overall rating for this product.
Pass Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
-
- 0%
- 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.
Read more about our Incentivized Reviews test. Check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.