NUTR 2150 Study Guide - Final Guide: Retinol Binding Protein, Retinol, Carotenoid
Document Summary
Complex, organic molecules that are widely distributed in nature. Content may be reduced by: cooking (inactivation), processing (removal), storage (degradation) Enrichment: added to replace those lost in processing fortification: added for health purposes- health aid/voluntary or prevent deficiencies/mandated. In digestive tract food breakdown in stomach begins release. Water soluble: absorbed by simple diffusion or active transport fat soluble: carried on lipoprotein micelles/chylomicrons. Fat soluble stored in body retinol binding protein. Minerals inorganic structural components and metabolic regulators: major- ca p mg (bones), na k cl- (electrolytes), s/(so4)2, trace- fe, zn, cu, mn, se, i, cr, mo, f, miscellaneous- as, b, ni, si, v, co, li, sn. Plants respond to mineral sin soil, fertilizer, water and air= variable impacted by processing- reduction (bran), increase (calcium hydroxide on corn tortillas) Phytic acid reduces bioavilability in plants- binds to positively charged ions and makes them unavailable for absorption tannins and oxalates reduce bioavailability.
