Colour Interval Value Publication Food Name Reference
[ 0.00, 0.33 ) 0.00 mg/100 g FW Lettuce - Red oak leaf DuPont, et al (2000) Effect of variety, processing, and stora.... Journal of Agricultural and Food Chemistry 48:3957-3964 PubMed (10995297)
[ 0.33, 0.67 ) 0.66 mg/100 g FW Lettuce - Red - Lollo rosso - Malibu DuPont, et al (2000) Effect of variety, processing, and stora.... Journal of Agricultural and Food Chemistry 48:3957-3964 PubMed (10995297)