Colour Interval Value Publication Food Name Reference
[ 1.26, 2.51 ) 1.26 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)
[ 2.51, 3.77 ) 3.76 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)