When perilla oil is treated with alkali (neutralization), it loses the most phytosterols—more than any other step—meaning this part of processing really strips away a valuable nutrient.
Scientific Claim
Neutralization is the refining step that most reduces phytosterol content in perilla seed oil, followed by degumming and bleaching, indicating process-specific losses of these bioactive lipids.
Original Statement
“Neutralization affected the contents of phytosterols the most, followed by the effects of degumming and bleaching.”
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 uses descriptive language matching the observational comparison of refining steps.
Evidence from Studies
Supporting (1)
Influence of refining processes on the bioactive composition, in vitro antioxidant capacity, and their correlation of perilla seed oil
The study found that when making perilla oil cleaner, the step called 'neutralization' removes the most healthy plant fats (phytosterols), then degumming, then bleaching — exactly as the claim says.