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Changes in Acid Base Status During High Salt Intake

NCT01655953 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 8

Last updated 2012-08-02

No results posted yet for this study

Summary

The study aimed to examine the effects of an alkalinisation of a NaCl (sodium chloride, salt)-rich diet on acid base status, bone metabolism, protein turnover and other influenced physiological systems. Due to increased urinary calcium excretion and bone resorption a high NaCl-intake is considered as a risk factor for osteoporosis. On the contrary an alkaline diet is known to have a beneficial influence on bone metabolism. Therefore the investigators hypothesized that an alkaline diet can reduce NaCl-induced bone resorption.

8 healthy male volunteers took part in a stationary study carried out in the metabolic ward of the German Aerospace Center. The study consisted of 2 campaigns, each lasting 16 days. Both campaigns were divided into 5 days of adaptation, 10 days of intervention and 1.5 days of stationary recovery. During the intervention period the volunteers diet was NaCl-rich (7.7 mmol Na/kg body weight/day) and supplemented in one campaign by 90 mmol potassium bicarbonate (KHCO3) in a randomized cross-over design. The other campaign served as control.

Bone metabolism was studied by bone formation markers in the fasting morning blood and 24h-urinary bone resorption markers. Acid base status was assessed by blood gas analyses in the fasted and the postprandial state as well as urinary markers. Protein turnover was studied with stable isotopes. Further physiological systems like energy metabolism and the cardiovascular system are also under investigation.

Conditions

  • Low Grade Metabolic Acidosis

Interventions

DIETARY_SUPPLEMENT

High NaCl + KHCO3

7.7 mmol Na/kgBW/d + 90 mmol KHCO3

OTHER

Control: high NaCl

7.7 mmol Na/kgBW/d

Sponsors & Collaborators

  • Charite University, Berlin, Germany

    collaborator OTHER

  • University of Erlangen-Nürnberg

    collaborator OTHER

  • DLR German Aerospace Center

    lead OTHER

Study Design

Allocation
RANDOMIZED
Purpose
BASIC_SCIENCE
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
19 Years
Max Age
35 Years
Sex
MALE
Healthy Volunteers
Yes

Timeline & Regulatory

Start
2007-07-31
Completion
2007-08-31

Countries

  • Germany

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT01655953 on ClinicalTrials.gov