Our Review Summary
The news release focuses on a small, short-term study of healthy women that found consuming two cups of mango a day was associated with reduced systolic blood pressure. However, it is not clear how much the systolic blood pressure was reduced or how the researchers accounted for normal, daily variations in blood pressure. The release also neglects to note how mango consumption would fit into other approaches that can be taken by healthy adults to maintain healthy blood pressure.
Without a control group in the study to prove otherwise, it’s possible the consumption of two cups of any fruit, or even any food, may affect systolic blood pressure. And the phenomenon of post prandial (after eating) drops in blood pressure are very real and affect a significant percentage of the population, especially the elderly. Consequently, it would be quite important to see the impact of consumption of two cups of anything on systolic blood pressure before concluding that it was the mangoes.
Why This Matters
This was a small, preliminary study and — as the release itself notes — “mangos may be a heart-healthy fruit” and longer-term studies are needed before drawing any firm conclusions. Given the vague nature of the reported findings, the fact that the relevant research paper is not publicly available (at the time of this review) and the preliminary nature of the study, the question becomes: why issue a news release on this now? After all, if the researchers think mangos may be a heart-healthy fruit, that means the researchers also believe they may not.
Criteria
Not Applicable
Cost is not addressed. That said, if one has access to mangoes, their cost is likely comparable to many other fruits in some parts of the country and higher in others. This raises the question of cost and access to fresh fruits and vegetables — which is a significant problem in many parts of the U.S. — but which is beyond the scope of what we can expect to be addressed in a news release. Taking all of this into account, we’ll mark this as “not applicable.”
Not Satisfactory
The release doesn’t quantify the benefits, instead noting that “once mango was consumed, systolic blood pressure was significantly lower two hours after mango intake compared to baseline values.” The release described benefits — all surrogate markers for health — in a similar way for reduced pulse pressure and reduced methane levels in the breath of three of the six patients who produced methane. What does “significantly lower” mean? And since all of the patients were described as healthy, do the reductions actually matter?
Not Satisfactory
Mangoes are a fruit. Eating fruit is generally a good idea — as long as it is part of a balanced diet. The “balanced diet” part is missing from the release. Mangos are not inherently unhealthy, but they do contain a significant amount of sugar. So, if one is going to increase one’s mango consumption, that should be offset by reducing other sources of sugar in the diet. Adding two cups of mangoes a day at 214 calories is not insignificant unless calories are cut back elsewhere in the diet. To be clear, we don’t think mangoes need a warning label — but a simple note that mango consumption should be incorporated into a balanced diet would have been valuable.
Not Satisfactory
The release did a fairly good job of describing the number of study participants, as well as their age, sex and health status. However, the release doesn’t address a key point that’s relevant to any study of blood pressure: how did they account for normal changes in blood pressure? In general, blood pressure follows a daily pattern: it’s lower at night, rising during the course of the day until afternoon, then lowering again from the late afternoon into the evening. That means that it’s important to understand how the study accounted for this normal variation. The release states that “systolic blood pressure was significantly lower two hours after mango intake compared to baseline values.” Okay, but how did they establish the baseline? And when did patients eat the mango? For example, if they consumed the mango at lunchtime, their blood pressure would likely have been lower two hours later anyway.
And as noted above, post prandial (after eating) drops in blood pressure affect a significant percentage of the population, especially the elderly. The study should have compared the impact of consuming two cups of any foods on systolic blood pressure before concluding that the mangoes were responsible for the drop.
Not Satisfactory
The release states that “two cups of mangos a day had beneficial effects on systolic blood pressure among healthy postmenopausal women.” However, if the women had healthy blood pressure levels already (as the release indicates), they didn’t need to lower their systolic blood pressure. Treating blood pressure as something that is inherently bad is misleading. High blood pressure can be dangerous. So can low blood pressure. It’s maintaining a healthy blood pressure that is important.
Satisfactory
The release clearly notes that the research was partially funded by the National Mango Board. We were unable to access the published study to check whether any conflicts of interest were disclosed.
Not Satisfactory
There are a host of options for patients who would like to lower their blood pressure — including a number of pharmaceutical interventions for patients who have high blood pressure. This study focused on healthy adults, so the pharmaceutical interventions are likely not relevant. But there are also a host of lifestyle-oriented options for people who are at risk of high blood pressure or who want to ensure they maintain a healthy blood pressure. These choices include things like reducing sodium intake, being physically active, and maintaining a healthy body weight. None of these things are mentioned in the release. It would have been good to see a reference to incorporating mango consumption into a broader effort involving a healthy diet and lifestyle choices — rather than treating mango consumption as a stand-alone intervention.
Not Applicable
The release doesn’t mention this, but presumably people know that mangoes are already available to the public. We’ll rate this not applicable.
Not Satisfactory
The release states that “This is the first study to demonstrate positive vascular effects of mango intake in humans.” The question is whether the study actually does demonstrate these effects. Given the lack of controls, we can’t be certain. This concern is addressed under “quality of evidence.”
Not Satisfactory
The headline states that “mangoes helped improve cardiovascular…health in women.” But the release doesn’t support that. The release tells us that healthy women who ate mango had reduced systolic blood pressure two hours after eating mango. It doesn’t tell us how much of a reduction there was. It doesn’t tell us whether the same result might occur with a different type of food. And it’s not clear that reducing the blood pressure of women who had healthy blood pressure is necessarily an improvement of cardiovascular health.
Total Score: 1 of 8 Satisfactory
Comments
We Welcome Comments. But please note: We will delete comments left by anyone who doesn’t leave an actual first and last name and an actual email address.
We will delete comments that include personal attacks, unfounded allegations, unverified facts, product pitches, or profanity. We will also end any thread of repetitive comments. Comments should primarily discuss the quality (or lack thereof) in journalism or other media messages about health and medicine. This is not intended to be a forum for definitive discussions about medicine or science. Nor is it a forum to share your personal story about a disease or treatment -- your comment must relate to media messages about health care. If your comment doesn't adhere to these policies, we won't post it. Questions? Please see more on our comments policy.
Our Comments Policy
But before leaving a comment, please review these notes about our policy.
You are responsible for any comments you leave on this site.
This site is primarily a forum for discussion about the quality (or lack thereof) in journalism or other media messages (advertising, marketing, public relations, medical journals, etc.) It is not intended to be a forum for definitive discussions about medicine or science.
We will delete comments that include personal attacks, unfounded allegations, unverified claims, product pitches, profanity or any from anyone who does not list a full name and a functioning email address. We will also end any thread of repetitive comments. We don”t give medical advice so we won”t respond to questions asking for it.
We don”t have sufficient staffing to contact each commenter who left such a message. If you have a question about why your comment was edited or removed, you can email us at feedback@healthnewsreview.org.
There has been a recent burst of attention to troubles with many comments left on science and science news/communication websites. Read “Online science comments: trolls, trash and treasure.”
The authors of the Retraction Watch comments policy urge commenters:
We”re also concerned about anonymous comments. We ask that all commenters leave their full name and provide an actual email address in case we feel we need to contact them. We may delete any comment left by someone who does not leave their name and a legitimate email address.
And, as noted, product pitches of any sort – pushing treatments, tests, products, procedures, physicians, medical centers, books, websites – are likely to be deleted. We don”t accept advertising on this site and are not going to give it away free.
The ability to leave comments expires after a certain period of time. So you may find that you’re unable to leave a comment on an article that is more than a few months old.
You might also like