Amazon.com > Health & Household > Vitamins & Dietary Supplements > Herbal Supplements > Saw Palmetto
Saw Palmetto Supplement for Prostate Health - Supports Those with Frequent Urination - Supports DHT...
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From Havasu Nutrition
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Top products in Saw Palmetto with authentic reviews:
Fail Overall Grade
FAIL Deleted Reviews
FAIL Suspicious Reviewers
FAIL Reviewer Ease
FAIL Overlapping Review History
FAIL Reviewer Participation
WARN Brand Repeats
PASS Rating Trend
PASS Unverified Purchases
PASS Word Count Comparison
PASS Phrase Repetition
PASS Incentivized Reviews
Most Trusted Reviews
I can tell a big difference in getting up during ... [Go to full review]
May 25, 2019
- Verified Purchaser
- Overrepresented word count (14 words)
- Critical Reviewer (avg. rating: 3.6)
Least Trusted Reviews
The supplement works well for skin and helped my hair ... [Go to full review]
Feb 7, 2017
- Verified Purchaser
- Take-Back Reviewer (1 deleted review; avg. rating: 5.0)
- Brand Monogamist (3 of 3 reviews for this brand; avg rating: 5.0)
- Overlapping Review History: reviewed 2 of 9 top products
- Overrepresented Participation (posted 3 reviews)
- Easy Grader (avg. rating: 5.0)
Fail Deleted Reviews
We discovered a total of 126 deleted reviews for this product, with an average rating of 4.5. 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.
4.5 average rating of deleted reviews
Show distribution of deleted reviews
Fail Suspicious Reviewers
66 of the 1,303 reviewers have only reviewed this product. The One-Hit Wonders have rated this product an average of 4.7 while the reviewers who have posted more than one review have rated this product an average of 4.4. 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.
426 of the 1,303 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.
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 4.4, 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.
4.4 Product's Average Ease Score
4.3 Category's Average Ease Score
Read more about our Reviewer Ease test.
Fail Overlapping Review History
Reviewers of this product have ALSO reviewed the following products:
204 of the 1,303 reviewers have substantial overlapping product review history. These reviewers have rated this product an average of 4.7 while the reviewers who have a more unique product review history rated this product an average of 4.4. 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
- From reviewers with an overrepresented participation
We see the following 2 participation groups with a statistically significant greater concentration than what we'd expect to see:
Warn Brand Repeats
50 of the 1,303 reviewers have reviewed multiple products but half or more of their reviews are for this brand. While this is more Brand Loyalists than we'd expect to see, the discrepancy in ratings between the Brand Loyalists and non-loyalists isn't significant enough to rule out the possibility of it being due to random chance.
Pass Rating Trend
- Created over 3 days
We counted 1,303 reviews for this product over the span of 982 days, an average of 1.3 reviews per day. If these reviews were created randomly, there would be a 99.9% chance that we would see 7 or fewer reviews on any given day.
However, we see the following 3 days exceeding this threshold:
Pass Unverified Purchases
123 of the 1,303 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 Word Count Comparison
- 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:
Pass Phrase Repetition
Reviews that contain one of these phrases are NOT necessarily devalued; read more about how this test works here.
29 of the 1,303 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 Incentivized Reviews
On Oct 3, 2016, Amazon prohibited incentivized reviews, however we still test for them since there are still millions in our dataset.
3 of the 1,303 total reviews for this product admitted to receiving a free or discounted product in exchange for a review. 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 Incentivized Reviews test, or check out our study showing that Incentivized Reviewers are much more likely to leave a positive review.