None listed
Conditions
Brief summary
Most sodium in the diet comes from the salt added to processed foods, such as bread. Added salt, used at the table or in cooking, also contributes to the amount of sodium and, if it is iodised salt, to iodine that people eat. The aim of this project is to measure the amount of added salt eaten by adults in New Zealand. This is done so by replacing lithium-tagged salt with the salt used in cooking at home and salt added at the table. Lithium acts as a tracer in the salt to differentiate between discretionary salt intake and other sodium sources. This information will help us make recommendations about the use of salt including iodised salt in the New Zealand diet.
Interventions
1. The lithium-tagged salt is produced in our food chemistry lab by combining lithium carbonate and sodium chloride. The final lithium content in the salt will be 250 micromol lithium/g salt (equivalent to 1.735g lithium/kg salt).
2. Participants will have ad libitum use of lithium-tagged salt for 7 days. Two 24-hour urine samples will be collected after 5-7 days of salt replacement. An increase in lithium in the urine will occur when participants replace usual salt intake with lithium-tagged s
1. The lithium-tagged salt is produced in our food chemistry lab by combining lithium carbonate and sodium chloride. The final lithium content in the salt will be 250 micromol lithium/g salt (equivalent to 1.735g lithium/kg salt). 2. Participants will have ad libitum use of lithium-tagged salt for 7 days. Two 24-hour urine samples will be collected after 5-7 days of salt replacement. An increase in lithium in the urine will occur when participants replace usual salt intake with lithium-tagged salt.
Sponsors
University of Otago
Study design
Allocation
Non-randomised trial
Primary purpose
Prevention
Eligibility
Sex/Gender
All
Age
18 Years to 40 Years
Healthy volunteers
Yes
Inclusion criteria
Apparently healthy adults aged 18-40 years, use salt in cooking and/or at the table, prepare and eat meals prepared in their own home.
Exclusion criteria
Taking diuretics or lithium; taking dietary supplements containing iodine; pregnant or breastfeeding; diagnosed renal or heart disease; children under 18 years old in the household
Outcome results
None listed