Sweet & Sour: Dietary Acid Load in Type 2 Diabetes and Kidney Disease Across Sex and Ethnic Groups
For patients and families
In plain language
An automatic summary of structured registry data. It is an orientation aid, not a substitute for the official protocol or a physician assessment.
- What is being studied
- The protocol lists: Low Dietary Acid Load.
- Who it may be relevant to
- Registry conditions: Type 2 Diabetes, Chronic Kidney Disease. Basic parameters: from 18 years · All.
- What needs checking
- Age, condition and sex are only basic indicators. Prior treatment, laboratory values and other mandatory requirements appear in the eligibility criteria below.
- Where it takes place
- Netherlands
- Next step
- Save the trial, show it to the treating physician, and confirm current recruitment with the study center. Costs, documents and travel →
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Official title
Sweet & Sour: Exploring Dietary Acid Load in Type 2 Diabetes & Kidney Disease Across Sex and Ethnicity
Overview
Chronic kidney disease (CKD) is a common condition and a major global cause of illness and mortality. The most common cause of kidney damage is diabetes, a condition that disrupts metabolism, leading to increased risk of damage to the kidneys and blood vessels. There is evidence suggesting that a diet with high acid load - consisting of acid-forming foods such as meat, cheese, and grain products - may contribute to this damage. People with such a diet often have poorer blood sugar control and more kidney damage. However, it is not yet well understood whether reducing dietary acid load can improve kidney function and diabetes management. Additionally, the role of ethnicity and sex in this process remains insufficiently explored. The goal of this clinical trial is to understand how diet affects kidney function and blood sugar regulation in individuals with diabetes type 2 and chronic kidney disease, as well as to explore the role of sex and ethnicity in these effects. The main questions it aims to answer are: Does a diet with lower acid load (e.g. less meat, cheese, and grain products) improve kidney function and blood sugar regulation in people with diabetes type 2 and chronic kidney disease? Does the effect of diet on kidney function and blood sugar differ between ethnic groups, specifically between White-Dutch and South-Asian Surinamese descent people? Participants will: * be randomly assigned to follow either a high- or low-acid load diet for 8 weeks; * Visit the study center four times (including screening) * Complete food diaries three times per week and keep in regular contact with a dietitian; * Collect 2x24-hour urine samples and morning feces at each visit ; * Undergo blood sampling and an oral glucose tolerance test (OGTT). * Spend a total of 8 hours at the study center (2 visits of 3 hours for OGTT and body composition tests, and 2 visits of 1 hour for additional assessments); * Have up to 200 ml of blood collected during the study.
Interventions
- Other Low Dietary Acid Load
This arm will follow a DAL lowering diet with the aim to reach \<25mEq H⁺/day
Primary outcome measures
- Percentage change in urinary albumin-to-creatinine ratio (UACR) [Time frame: Change between baseline and 8 weeks]
Secondary outcome measures (7)
- Change in estimated glomerular filtration rate (eGFR) [Time frame: Change between baseline and 8 weeks]
- Change in serum bicarbonate [Time frame: Change between baseline and 8 weeks]
- Change in urinary citrate [Time frame: Change between baseline and 8 weeks]
- Glucose response during Oral Glucose Tolerance Test [Time frame: Change between baseline and 8 weeks]
- Change in glucose variability (MAGE) [Time frame: Change between baseline and 8 weeks]
- Change in gut microbiota composition [Time frame: Change between baseline and 8 weeks]
- Change in serum metabolite profiles [Time frame: Change between baseline and 8 weeks]
Eligibility criteria
Inclusion criteria
- Age >18 years
- Presence of T2D and CKD stage G1-3a with albuminuria (>10mg/mmol)
- BMI≥ 25kg/m2 - Use of metformin on a stable dose (i.e. no changes in the last three months)
- Adequate knowledge of the Dutch language to comprehend the provided study information
- If incretin therapy is used, then subject must have used that for a minimum of 6 months before starting with the trial
- Use of ACE inhibitors or angiotensin II receptor blokkers
- Of white European Dutch or South-Asian Surinamese descent
Exclusion criteria
- Use of insulin
- serum bicarbonate < 20 mmol/L
- Use of antibiotics 3 months before inclusion
- Vegetarian diet - Presence of inflammatory bowel disease or other chronic inflammatory disease
- Alcohol consumption of more than 14 units per week in women, or more than 21 units per week in men
- Active malignancy - bariatric or other weight loss surgery in the history
- patients diagnosed with eating disorders (such as bulimia nervosa, anorexia nervosa or binge-eating disorder)
- HbA1c >9% (75mmol/mol) at screening
- Unmotivated or not able to adhere to a specific diet
- The subject is already currently involved in a clinical trial
Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.
Healthy volunteers: No
Study design
- Allocation
- Randomized
- Model
- Parallel assignment
- Masking
- Open label
- Primary purpose
- Prevention
Study locations
Netherlands · 1 center
- Erasmus Medical Center — Rotterdam
Identifiers
NCT: NCT07587918 · NL-010928