Colour Interval Value Publication Food Name Reference
[ 0.34, 0.62 ) 0.34 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)
[ 0.62, 0.91 ) 0.90 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)