Twenty-two adult male subject were randomly assigned to four complete liquid diets at four different fiber levels; one without added soy polysaccharide fiber which served as a control. All subjects were rotated. through four, eleven day controlled feeding periods. Complete fecal samples were collected and composited from the last five days of each eleven day period for fiber analysis. Fasting blood samples were taken on the morning prior to starting each new dietary period for plasma total cholesterol (TC), total triglycerides (TG), and high density lipoprotein-cholesterol (HDL-C) analyses, Low density lipoprotein-cholesterol (LDL-C) was determined by calculation.
Increased mean dietary fiber intake led to a significant (P<.05) increase in fecal fiber from 0.4 g per day to 2.9 g per day. Mean apparent fiber digestibility significantly (P<.05) decreased from 92% on the control diet to 70% on the intermediate fiber diet. There was a nonsignificant increase in apparent fiber digestibility from the intermediate fiber diet (70%) to the high fiber diet (76%). When subjects went from self-selected diets to the zero-cholesterol, liquid formula diets, significant (P<.05) decreases were seen in plasma TC (from 164 mg/dl to a range of 129 to 136 mg/dl), LDL-C (from 108 mg/dl to a range of 81-85 mg/dl), TG (from 85 mg/dl to a range of 64 to 72 mg/dl), TC/HDL-C ratios (from 4.6 to an average of 3.8), and LDL-C/HDL-C ratios (from 2.9 to an average of 2.4). HDL-C levels did not change from the self-selected diet to the zero-cholesterol liquid formula diets (from 38 mg/dl to a range of 35 to 38 mg/dl). The addition of 20, 30, and 40 g of soy polysaccharide a fiber to the low residue control diet did not result in any further changes in plasma TC (131 mg/dl versus 129 mg/dl, 136 mg/dl, and 132 mg/dl respectively), TG (72 mg/dl versus 64 mg/dl, 69 mg/dl, and 72 mg/dl, respectively), HDL-C (36 mg/dl versus 35 mg/dl, 38 mg/dl and 37 mg/dl respectively), LDL-C (81 mg/dl versus 81 mg/dl, 85 mg/dl, and 82 mg/dl, respectively), TC/HDL-C ratios (3.8 versus 3.9, 3.8, and 3.8, respectively), and LDL-C/HDL-C ratios (2.4 versus 2.5, 2.4, and 2.3, respectively). At the end of the study when subjects went back to self-selected diets plasma TC, LDL-C, and HDL-C all significantly (P<.05) increased. / Master of Science
| Identifer | oai:union.ndltd.org:VTETD/oai:vtechworks.lib.vt.edu:10919/76021 |
| Date | January 1983 |
| Creators | Kennedy, Ellen |
| Contributors | Human Nutrition and Foods |
| Publisher | Virginia Polytechnic Institute and State University |
| Source Sets | Virginia Tech Theses and Dissertation |
| Language | en_US |
| Detected Language | English |
| Type | Thesis, Text |
| Format | vii, 123, [2] leaves, application/pdf, application/pdf |
| Rights | In Copyright, http://rightsstatements.org/vocab/InC/1.0/ |
| Relation | OCLC# 11012113 |
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