Colour Interval Value Publication Food Name Reference
[ 5.99, 10.44 ) 5.99 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)
[ 10.44, 14.90 ) 14.89 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)