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  • How are reviewers describing this item?
    good, great, easy, low and high.
  • Our engine detects that in general the reviewers have a positive sentiment.
  • Our engine has profiled the reviewer patterns and has determined that there may be deception involved.
  • Our engine has determined that the review content quality is low.
  • Our engine has analyzed and discovered that 61.2% of the reviews are reliable.
  • This product had a total of 224 reviews as of our last analysis date on May 16 2020.


Most positive reviewquestion

Keeps my Vitamin D levels in check.

Least positive reviewquestion

Not enough review data to provide meaningful insight.

Most authentic reviewquestion

Product is exactly as expected, plus it's convenient to have a large size.

Least authentic reviewquestion

Carlson is EXCELLENT product. I could discuss the benefits of Carlson over other brands, but I've done that in depth long ago ...  Read More

Helpful Insights


    Posted by a reviewer on Amazon

    The international units (iu) is another conversation.

    Posted by a reviewer on Amazon

    Now, after having my levels checked again, they're within the middle of the normal range.

    Posted by a reviewer on Amazon

    With many supplements that are supposed to be good for your overall health, it's difficult to know whether or not they're working.

Review Count History
Price History