Determination of Lysine Requirements in Pregnancy
Amino acids are building blocks of protein in our body. It is important that pregnant women eat adequate amount of protein/amino acids to ensure healthy growth and development of the fetus.Lysine is an amino acid that is present in high amounts only in animal foods (meat) and not much in plant foods such as wheat. Currently , it is not known how much lysine is needed to eat during pregnancy.
Current Dietary Reference Intake recommendations for amino acid requirements are based on non-pregnant adults, and minimally based on pregnancy-specific data.To the investigators knowledge, there is no scientific information regarding the amount of lysine needed at different stages of pregnancy.
The investigators hypothesize that current recommendations for lysine intake in pregnant women are underestimated. The investigators also hypothesize that the lysine requirements will be greater during the later stages of pregnancy, compared to early stages.
The purpose of this study is to determine lysine requirements in healthy pregnant women 19-40y,(1st and 3rd trimester) using a modern, safe and quick technique called the indicator amino acid oxidation technique and to compare lysine requirements during early (15-18 weeks last menstrual period) late (33-36 weeks last menstrual period) stages of pregnancy.
|Study Design:||Intervention Model: Single Group Assignment
Masking: Single Blind (Subject)
Primary Purpose: Basic Science
|Official Title:||Determination of Lysine Requirements in Healthy Pregnant Women Using the Indicator Amino Acid Oxidation Technique|
- 13 carbon dioxide production [ Time Frame: 8 hours (1 study day) ] [ Designated as safety issue: No ]Urine and breath samples will be collected during the study to measure the rate of oxidation of tracer in expired breath and flux by enrichment in urine.
|Study Start Date:||January 2012|
|Study Completion Date:||June 2014|
|Primary Completion Date:||January 2014 (Final data collection date for primary outcome measure)|
Experimental: Lysine intake
Dietary supplement:lysine intake
Dietary Supplement: Lysine intake
Oral consumption of Eight hourly experimental meals- Includes 4 tracer-free experimental meals containing a mixture of free amino acids, calories from a flavored liquid and protein free cookies and 4- labeled amino acid experimental meals.
Please refer to this study by its ClinicalTrials.gov identifier: NCT01776931
|Canada, British Columbia|
|Child & Family Research Institute|
|Vancouver, British Columbia, Canada, V5Z 4H4|
|Principal Investigator:||Rajavel Elango, PhD||Child & Family Research Institute/University of British Columbia|