| Popis: |
Diets high in fiber and oxalate may result in decreased mineral bioavailability. However, increased fiber intake can reduce risk factors for some diseases. Twelve men were fed diets containing 25g or 5g of neutral detergent fiber with 450 mg/day of oxalic acid for six weeks each in a crossover design to determine whether plasma minerals and other metabolites would be affected. High dietary oxalate levels were fed throughout the study. The fiber sources were fruit and vegetables or their juices and spinach was the source of oxalate. Five minerals and cholesterol, triglycerides, uric acid, glucose and urea nitrogen (BUN) were measured in fasting plasma and correlated with fecal oxalate, mineral intake and apparent mineral balance. Fiber level had no effect on the plasma constituents. Plasma inorganic phosphorus (P 1 ) decreased (p=0.002), while BUN, calcium and copper increased (p i changes which occurred may have been related to ingestion of high levels of oxalate for eighty-four days. |
