title: Bioavailability of copper to rats from various foodstuffs and in the presence of different carbohydrates.
abstract: Copper bioavailability was studied in rats using an extrinsic Cu label. Copper absorption from sunflower seeds (46%), peanuts (41%), cooked shrimp (50%), and cooked beef (40%) was as good or better than copper sulfate (46%). Copper from plant foods (sunflower seeds, garbanzo beans, peanuts) was absorbed equally as well as copper from animal foods (beef, shrimp, chicken liver), 39 +/- 7% vs 43 +/- 7%, P greater than 0.05. There was no significant difference in percentage Cu absorption between intrinsically labeled chicken liver and extrinsically labeled chicken liver. In a second experiment, Cu absorption was measured in the presence of glucose, fructose, sucrose, or cornstarch. There were no significant differences in Cu absorption due to different carbohydrates in a single meal.
authors.affiliation: United States Department of Agriculture, Grand Forks Human Nutrition Research Center, North Dakota 58202.
authors.forename: P E
authors.initials: PE
authors.lastname: Johnson
authors.forename: M A
authors.initials: MA
authors.lastname: Stuart
authors.forename: T D
authors.initials: TD
authors.lastname: Bowman
mesh_terms: D000042:Absorption; D000818:Animals; D010367:Arachis; D001682:Biological Availability; D002417:Cattle; D002645:Chickens; D003300:Copper / Q000493:pharmacokinetics*; D003301:Copper Radioisotopes; D019327:Copper Sulfate; D033364:Decapoda; D004040:Dietary Carbohydrates / Q000494:pharmacology*; D005502:Food; D006368:Helianthus; D008099:Liver; D008297:Male; D008460:Meat; D051381:Rats; D012639:Seeds
chemical_list: D003301:Copper Radioisotopes; D004040:Dietary Carbohydrates; D003300:Copper; D019327:Copper Sulfate