Dynamic changes in serotonin across cultivars, growth stages, and processing methods in walnut (Juglans regia L.) via high-performance liquid chromatography-ultraviolet analysis

Key Points

• Serotonin levels vary significantly depending on walnut cultivar and growth stage.
• High-performance liquid chromatography shows quantifiable changes in serotonin concentrations across different processing methods.
• Assessment of walnut cultivars was performed to correlate growth stages and serotonin levels with quality traits.
• Findings highlight the potential for optimizing walnut processing to enhance serotonin content, indicating benefits for health.