2445: Vitamin K Absorption

Men and Women, Ages 18 - 40 and over 55

To learn how the body responds to different amounts of vitamin K in the diet
Major Exclusions:	Smoking Diabetes Kidney or liver disease Cholesterol lowering medications Hormone therapy/ oral contraceptive use in the previous 3 months Warfarin or anticoagulant use in the previous 12 months Blood clotting disorder and/or abnormal clotting time Use of acid reducers more than twice a week Prescribed osteoporosis medications in the previous 3 months
Length of Study:	3 months	# of Visits:	1 visit in pre-diet phase; 3 visits per week for food pick-up in 62 day diet phase
Residency:	9 overnight stays	Study Diet	For 62 days, all foods provided by the HNRCA
Payment:	$15 for screening $1430 for study completion	Can I Work?	Yes, except for 2 of the 9 residency for study completion days

Length of study
Total length of the study including resident stays and nonresident visits.
This does not mean you will be testing the entire time.
Residency
The length of time volunteers are required to stay overnight at the HNRCA. Residents have their own private room, bathroom, television, VCR, and phone during their stay.
Payment
The amount of reimbursement for travel and inconvenience.
Number of visits
Total number of nonresident visits.
Study diet
Indicates meals which will be provided by the HNRCA.
Can I work?
Indicates if you will be able to work and if so, when.

For more information, please complete our Study Inquiry Form or call Volunteer Services at (800) 738-7555 and a Recruiter will return your call as soon as possible.

We appreciate your interest in our program and we hope to work with you in the future.

Thank you,

The Recruitment Office
Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University