- There is a report that no clear association was found between lutein and cognitive performance.
- The evidence score is 42, and reliability is considered low.
- This is based on a survey of adults.
Lutein is one of the ingredients obtained through diet.
It is incorporated in various forms in the context of nutritional intake.
Regarding whether consuming lutein produces a change in cognitive performance (the overall ability of the brain to process information and translate it into action), there is a report that, at present, no clear association has been found.
This study examined what effect dietary lutein intake in adults has on brain function. Specifically, the investigation looked at aspects such as the organization of information and how attention is directed.
The analysis method used was a meta-analysis (a method that aggregates the results of multiple studies to look for an overall trend). This is an attempt to combine individual studies into one large dataset in order to reach a more objective conclusion.
There are reports of a slight improvement in areas such as attention, judgment, and memory.
Specifically, three areas were examined: "complex attention" — concentrating on a specific target amid complex information; "executive function" — for planning and carrying out tasks; and "memory" — for retaining information. These are important indicators for measuring brain performance.
However, these changes fell within a range that did not reach statistical significance (an indicator used to determine whether a difference is meaningful rather than due to chance). In other words, although slight numerical movements were confirmed, they were not large enough to distinguish whether they were due to lutein or simply due to error that happened to occur at that time.
The reliability of the information based on this analysis is considered low.
This study is based on a single study. A meta-analysis (a method that aggregates the results of multiple studies to look for an overall trend) normally increases precision by combining many studies, but in this case, the number of studies included was limited.
The evidence score (an indicator showing how certain the results of a study are) shows a value of 42. Based on this score, it is difficult to sufficiently guarantee the certainty of the information using the current data alone.
At this point, nothing definite can be said about what effect lutein intake has on the brain.
This analysis covers only a single study, and one factor is that the amount of information examined is insufficient. Considering the variability in research results as well, it can be said that the current data alone is not enough to reach a conclusion.
For this reason, judging a specific effect based on this report content alone requires caution. This is because a more reliable trend only becomes visible once many studies have accumulated.
| Study | Design | Number of participants | Duration | Main result |
|---|---|---|---|---|
| Molecules (Basel, Switzerland) (2021, PMID:34641336) | Meta-analysis | Unknown | Unknown | No clear association was found |
This study was conducted on adults.
For an adult considering information about their own cognitive function, the characteristics of this subject group can serve as one point of reference.
The study design is a meta-analysis covering randomized controlled trials (RCTs).
Only 1 study was included, which is a limitation in terms of accumulated data.
A study has reported that no clear association was found with cognitive performance.
Does taking lutein change cognitive performance?
A: A study has reported that no clear association was found with cognitive performance. The relationship with dietary intake has been examined.
Is there data showing that lutein helps maintain attention?
A: Results show that the effect was not significant for attention, executive function, or memory. No effect on cognitive function has been confirmed.
How reliable are the research results on lutein?
A: The reliability of this report is considered limited. It is based on 1 study.
There is a report that no clear association is seen between lutein and cognitive performance. The evidence score is 42, and reliability is considered low. Since this content is based on a single study, it should still be interpreted with caution. Try checking your own condition with the self-check assessment.