Influence of dietary fat on fecal mutagenicity in premenopausal women.
A dietary intervention study was conducted on 31 premenopausal women (age: 20-40 years) to investigate the relationship between dietary fat and fecal mutagenicity. After a free-living period (baseline) of one menstrual cycle, the subjects were placed on a high-fat diet (40% calories from fat) for 4 menstrual cycles, followed by a low-fat diet (20% calories from fat) for 4 menstrual cycles. One-half of the subjects were randomly assigned throughout the study to a diet with a P:S ratio of 1.0 while the other half was assigned to one with a P:S ratio of 0.3; body weight by group remained constant. Three-day stool samples were collected at the mid-follicular period during the free-living phase and during the 4th menstrual cycle of each of the 2 controlled diet periods. Mutagenicity was assayed by the SOS chromotest. Reduction of dietary fat was accompanied by a significant decrease in fecal mutagenicity in both P:S groups. Combined values, i.e., both P:S groups, were 20.3 units for high-fat diets vs. 8.78 for low-fat diets.
Lipid Nutrition Laboratory, Beltsville Human Nutrition Research Center, ARS, USDA, MD 20705.
P P
PP
Nair
S
S
Shami
E
E
Sainz
M
M
Menon
L B
LB
Jerabek
D Y
DY
Jones
J T
JT
Judd
W S
WS
Campbell
M H
MH
Schiffman
P R
PR
Taylor
D000328:Adult; D004032:Diet; D004041:Dietary Fats / Q000378:metabolism*; D002149:Energy Intake; D005243:Feces / Q000032:analysis*; D005260:Female; D006801:Humans; D009152:Mutagenicity Tests; D011897:Random Allocation; D013014:SOS Response, Genetics
D004041:Dietary Fats