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CompletedNCT02542033Updated Feb 11, 2021

Glycemic Response to Low Sugar Apple Juice

An interventional study of treated apple juice with low sugar content and un-treated apple juice with normal sugar content in Impaired Fasting Glucose, sponsored by Clinical Research Center Kiel GmbH. Completed at 1 site in Germany. Open to male participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-02-11.

Sponsored by Clinical Research Center Kiel GmbH · Not applicable, Interventional, and Basic science

Phase
Not applicable
Study type
Interventional
Enrollment
30
Allocation
Randomized
Ages
18 Years and older
Sex
Male
01

Study summary

Primary objective of this study is to investigate the effect of sugar reduction (starting from glucose and sucrose, respectively) on postprandial glycemic response to apple juice by comparing the reference food item apple juice (control) with the test product (apple juice with low sugar content) in male humans with impaired fasting glucose (IFG) (5.6-6.9mmol/l resp. 100-125mg/dL) (Kerner and Brückel, 2012 (DDG recommendation)) Secondary objective of this study is to investigate the effect of sugar reduction on postprandial insulinemic response.

Exploratory objectives are to investigate further characteristics of postprandial glucose and insulin response and insulin sensitivity, gastrointestinal side effects and safety aspects.

Read the detailed description

Objectives:

Investigating the effect of sugar reduction in apple juice on glycemic and insulin response to ingestion of this drink.

Subjects/Methods:

In a double-blind randomized placebo-controlled clinical trial with cross-over design 30 male adults with impaired fasting glucose (IFG) received an oral drink of 500mL: 1. Verum: Apple juice, treated (low sugar content); 2. Control: Untreated apple juice (normal sugar content). Capillary blood glucose and venous plasma insulin were measured twice at baseline and then at times 0 (start of drink), 15, 30, 45, 60, 90 and 120 min.

02

Conditions studied

  • Impaired Fasting Glucose

Keywords

  • postprandial glycemia; apple juice; sugar reduction
03

In context

Lead sponsor

Clinical Research Center Kiel GmbH is the lead sponsor of 7 studies on the registry; none are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  1. Males aged ≥ 18y
  2. diagnosed impaired fasting glucose (IFG)
  3. Written informed consent

Exclusion criteria

Exclusion Criteria:

  1. Subjects currently enrolled in another clinical study
  2. Subjects having finished another clinical study within the last 4 weeks before inclusion
  3. Hypersensitivity, allergy or idiosyncratic reaction to apple, apple juice or other apple containing food
  4. Acute or chronic infections
  5. Renal insufficiency
  6. Gastrointestinal illness
  7. History of gastrointestinal surgery
  8. Known fructose intolerance
  9. Overt Diabetes mellitus
  10. Endocrine disorders
  11. Any disease or condition which might compromise significantly the hematopoietic, renal, endocrine, pulmonary, hepatic, cardiovascular, immunological, central nervous, dermatological or any other body System with the exception of the conditions defined by the inclusion criteria
  12. History of hepatitis B and C
  13. History of HIV infection
  14. History of coagulation disorders or pharmaceutical anti-coagulation (with the exception of acetylsalicylic acid)
  15. Regular medical treatment including OTC, which may have impact on the study aims (e.g. antidiabetic drugs, laxatives etc.)
  16. Major cognitive or psychiatric disorders
  17. Subjects who are scheduled to undergo hospitalization during the study period
  18. Eating disorders (e.g. anorexia, bulimia) or special diets (e.g. vegan, vegetarian)
  19. Present drug abuse or alcoholism
  20. Legal incapacity
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Quadruple (Participant, Care provider, Investigator, Outcomes assessor)
Enrollment
30 participants (actual)

Study arms

  • Active comparator
    verum

    500mL treated apple juice with low sugar content given on one experimental day

    Other: treated apple juice with low sugar content

  • Placebo comparator
    control

    500mL un-treated apple juice with normal sugar content given on one experimental day

    Other: un-treated apple juice with normal sugar content

Interventions

  • Othertreated apple juice with low sugar content

    Each study participant consumed 500 mL test juice at the morning of the interventional day. The 500 mL bottle content had to be ingested within 5 minutes. an intravenous catheter was inserted into a forearm vein for blood withdrawal at baseline, directly before (time point 0) and 15, 30, 45, 60, 90 and 120 minutes after starting the ingestion of the test product. From all samples plasma insulin was measured. From the blood samples taken at baseline and 120 minutes after consumption of the test product safety parameters were determined. Capillary blood was taken from the finger pad using a HemoCue® Safety Lancet at baseline (twice) and once directly before (time point 0) and 15, 30, 45, 60, 90 and 120 minutes after ingestion of the test product.

  • Otherun-treated apple juice with normal sugar content

    Each study participant consumed 500 mL test juice at the morning of the interventional day. The 500 mL bottle content had to be ingested within 5 minutes. an intravenous catheter was inserted into a forearm vein for blood withdrawal at baseline, directly before (time point 0) and 15, 30, 45, 60, 90 and 120 minutes after starting the ingestion of the test product. From all samples plasma insulin was measured. From the blood samples taken at baseline and 120 minutes after consumption of the test product safety parameters were determined. Capillary blood was taken from the finger pad using a HemoCue® Safety Lancet at baseline (twice) and once directly before (time point 0) and 15, 30, 45, 60, 90 and 120 minutes after ingestion of the test product.

06

What researchers measure

Primary outcomes

  1. incremental area under the postprandial glucose curve

    Time frame: 120 min postprandially

Secondary outcomes

  1. incremental area under the postprandial insulin curve

    Time frame: 120 min postprandially

07

Study locations

1 site
  • Clinical Research Center (CRC) Kiel GmbH
    Kiel, Schleswig-Holstein 24118, Germany
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 11, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02542033
Lead sponsor
Clinical Research Center Kiel GmbH
Collaborators
Nofima
Responsible party
Sponsor
First posted
Sep 4, 2015
Start date
May 2015
Primary completion
Aug 2015
Completion
Nov 2015
Last update
Feb 11, 2021

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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