This is the first time anyone has tracked how the yellow pigments in perilla oil change during processing—and they found that the main one, lutein, vanishes completely when the oil is bleached.
Scientific Claim
The study provides the first reported analysis of carotenoid content changes during perilla seed oil refining, with lutein identified as the primary carotenoid and fully lost during bleaching.
Original Statement
“In this paper, we analyzed the variation of carotenoid content in PSO during the refining process for the first time. The main carotenoid of PSO was found to be lutein, and the compound was lost completely during the bleaching step of the refining process.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design cannot support claim
Appropriate Language Strength
association
Can only show association/correlation
Assessment Explanation
Based on abstract only - full methodology not available to verify. The claim accurately reflects the authors’ statement of novelty without overinterpreting.
Evidence from Studies
Supporting (1)
Influence of refining processes on the bioactive composition, in vitro antioxidant capacity, and their correlation of perilla seed oil
This study is the first to check what happens to natural color compounds in perilla seed oil during processing, and it found that lutein — the main one — disappears entirely when the oil is bleached.