title: Studies on the retention of microencapsulated l-5-methyltetrahydrofolic acid in baked bread using skim milk powder.
abstract: Our aim was to protect l-5-methyltetrahydrofolic acid (L-5-MTHF) from degradation throughout the baking and storage of a fortified white bread using microencapsulation. L-5-MTHF, with or without sodium ascorbate (ASC), was microencapsulated using skim milk powder (SMP) as the coating agent. Recoveries of L-5-MTHF in spray-dried materials were greater than 95 ± 5%. Microencapsulated L-5-MTHF was completely released from the skim milk coating material in simulated gastric fluid within the first 10 min at 37°C. Incorporation of SMP-L-5-MTHF or SMP-L-5-MTHF+ASC into bread gave recoveries of 81.3 ± 1.3% and 87.1 ± 1.2% (n=3), respectively, for L-5-MTHF immediately after bread baking. These treatments also showed significantly (p<0.05) greater L-5-MTHF stability during room temperature storage, compared to the free L-5-MTHF. This study has shown that SMP is an effective microencapsulating agent and in the presence of ASC will produce excellent conditions for stabilising L-5-MTHF in baked bread.
authors: Food Nutrition and Health, University of British Columbia, 2205 East Mall, Vancouver, BC, Canada V6T 1Z4.
authors: Stephen
authors: S
authors: Tomiuk
authors: Food Nutrition and Health, University of British Columbia, 2205 East Mall, Vancouver, BC, Canada V6T 1Z4.
authors: Yazheng
authors: Y
authors: Liu
authors: Food Nutrition and Health, University of British Columbia, 2205 East Mall, Vancouver, BC, Canada V6T 1Z4.
authors: Tim J
authors: TJ
authors: Green
authors: Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, United Kingdom.
authors: Maria J
authors: MJ
authors: King
authors: Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, United Kingdom.
authors: Paul M
authors: PM
authors: Finglas
authors: Institute of Food Research, Norwich Research Park, Colney, Norwich NR4 7UA, United Kingdom. Electronic address: ddkitts@interchange.ubc.ca.
authors: David D
authors: DD
authors: Kitts
mesh_terms: D000818:Animals; D001939:Bread / Q000032:analysis*; D002417:Cattle; D004339:Drug Compounding; D008892:Milk / Q000737:chemistry*; D011208:Powders; D013763:Tetrahydrofolates / Q000737:chemistry*
chemical_list: D011208:Powders; D013763:Tetrahydrofolates; C005984:5-methyltetrahydrofolate
keywords: Bread baking; Microencapsulation; Stability; l-5-Methyltetrahydrofolate