An investigation into whether the way potato is prepared, and what it is eaten with, affects the blood glucose response to its consumption, in people with type 2 diabetes

The effect of potato form and consumption pattern on acute glycaemia in individuals with type 2 diabetes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN67897032

Enrollment

Registered

2021-08-12

Start date

2021-08-01

Completion date

Unknown

Last updated

2024-06-10

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Type 2 diabetes Nutritional, Metabolic, Endocrine Type 2 diabetes mellitus

Interventions

The study will be a randomised crossover study consisting of 12 study visits per participant. Each study visit will last approximately 4 hours. Participants will arrive in the morning after an overn

each participant will consume each meal twice over the course of their 12 study mornings. Each study visit will be separated by at least 2 days.

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Patients with a diagnosis of type 2 diabetes >6 months 2. Males and females 3. Aged 18-70 years 4. Ability to understand English (to provide informed consent)

Exclusion criteria

Exclusion criteria: 1. Use of insulin and GLP-1 analogues 2. History of gastroparesis or gastric surgery 3. Coeliac disease/wheat intolerance 4. Irritable bowel syndrome 5. HbA1c >75 mmol/mol 6. Pregnancy/breastfeeding 7. Excess alcohol intake 8. Glucose-lowering drug dosage adjustment within the previous month 9. Antibiotics in the last 3 months

Design outcomes

Primary

Measure	Time frame
At each visit using blood test: 1. Incremental area under the 3 h glucose response curve (IAUC). Sample timepoints are 0, 15, 30, 45, 60, 75, 90, 120 and 180 min.	—

Secondary

Measure	Time frame
At each visit using blood test: 1. Incremental area under the 3 h insulin response curve (IAUC). Sample timepoints are 0, 15, 30, 45, 60, 75, 90, 120 and 180 min. 2. Peak glucose. 3. Peak insulin. 4. Time-to-peak glucose. 5. Time-to-peak insulin. 6. Matsuda Index. 7. Insulinogenic index.	—

Countries

England, United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026