title: Carotenoid content and in vitro bioaccessibility of lycopene from guava (Psidium guajava) and watermelon (Citrullus lanatus) by high-performance liquid chromatography diode array detection.
abstract: The carotenoid content and in vitro accessibility of the 'Sugar baby' variety of watermelon and the 'Horana red' variety of guava from Sri Lanka was determined using high-performance liquid chromatography. The high-performance liquid chromatography chromatogram showed that the Guava 'Horana red' variety contained almost exclusively lycopene (45.3 +/- 8.0 microg/g fresh weight (FW)), with a small amount of lutein (2.1 +/- 0.6 microg/g FW), beta-carotene (2.0 +/- 0.2 microg/g FW) and beta-cryptoxanthin. As far as carotenoids in the sugar baby variety of watermelon are concerned, it contained lycopene, lutein and beta-carotene of 37.2 +/- 4.0 microg/g FW, 2.1 +/- 0.6 microg/g FW and 0.3 +/- 1 microg/g FW, respectively. The studies showed that guava contains more lycopene (45.3+/-8.0 microg/g FW) than watermelon (37.2 +/- 4.0 microg/g FW), and that the in vitro accessibility of lycopene in guava (73%) is more than that in watermelon (25.8%). Therefore it can be concluded that guava can be used as a better lycopene source than watermelon.
authors.affiliation: Department of Biochemistry, Faculty of Medical Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka. chandri@sjp.ac.lk
authors.forename: U G
authors.initials: UG
authors.lastname: Chandrika
authors.forename: K S S P
authors.initials: KS
authors.lastname: Fernando
authors.forename: K K D S
authors.initials: KK
authors.lastname: Ranaweera
mesh_terms: D002338:Carotenoids / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D002855:Chromatography, Thin Layer; D029773:Citrullus / Q000737:chemistry*; D007455:Iodine / Q000737:chemistry; D007536:Isomerism; D000077276:Lycopene; D031647:Psidium / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
chemical_list: D002338:Carotenoids; D007455:Iodine; D000077276:Lycopene