How does restricting your food intake to 8 hours as either early or late in the day influence the regulation of blood sugar levels
This study is exploring how different meal timings affect blood sugar control in people who are overweight or obese and at risk of developing type 2 diabetes. Researchers want to compare eating all your meals within an 8-hour window, either earlier (8 AM to 4 PM) or later (11 AM to 7 PM) in the day. The goal is to understand if simply changing *when* you eat, rather than *what* or *how much*, can improve how your body handles sugar. Participants will try both eating patterns for a few days, with a break in between. The findings could help identify new ways to support better health for people at risk of type 2 diabetes.
At a glance
What is this study about?
This study is investigating something called 'time-restricted eating' (TRE). This is a way of eating where you limit the hours in the day when you consume food, without necessarily changing the total amount of food you eat. The researchers want to find out if the timing of your meals can make a difference to your blood sugar levels, especially for people who are overweight or obese and might be at a higher risk of developing type 2 diabetes.
Type 2 diabetes is a condition where your body doesn't use insulin properly, leading to high blood sugar levels. Scientists believe that *when* you eat might be just as important as *what* you eat for keeping your blood sugar stable. This study aims to test this idea by comparing two different 8-hour eating windows: one earlier in the day and one later. The information gathered will help us better understand if changing meal times can be a helpful strategy for improving metabolic health.
By taking part, you could contribute to important research that might help countless people manage their blood sugar and potentially reduce their risk of type 2 diabetes in the future. The results could lead to new, simple advice on how to eat for better health.
Key takeaways
- This study explores how *when* you eat affects blood sugar levels.
- It compares eating within an 8-hour window, either early or late in the day.
- Aims to help people at risk of type 2 diabetes manage blood sugar.
- Participants will follow two different simple eating schedules.
- Involves continuous blood sugar and activity monitoring.
- Could help us understand new ways to improve health through meal timing.
Who may be eligible?
To join this study, you need to be an adult between 45 and 60 years old. You should be someone who is considered overweight or obese, meaning your Body Mass Index (BMI) is 25 or higher. You should also generally lead a less active lifestyle, meaning you do less than 150 minutes of moderate to strong exercise each week.
Another important factor is your current eating habits. You should typically spread your meals and snacks out over more than 14 hours each day. You must generally be healthy and not already be following a specific diet like time-restricted eating. You also cannot be pregnant or planning to become so.
You cannot take part if you have a diagnosis of diabetes (a specific blood test result called HbA1c at or above 48 mmol/mol), if you're taking part in another health study, have a history of substance abuse, certain heart problems in the last six months, a learning disability, or an eating disorder. The researchers want to ensure the study is safe and suitable for everyone involved.
Could this study suit you?
Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.
- Are you between 45 and 60 years old?
- Are you considered overweight or obese (BMI of 25 or more)?
- Do you generally do less than 150 minutes of moderate exercise per week?
- Do you usually eat your meals over more than 14 hours a day?
- Are you generally healthy and not currently on a specific restrictive diet?
- Have you *not* been diagnosed with diabetes?
What does participation involve?
If you decide to take part, you'll go through two different eating plans, each lasting 3 days, with a week's break in between. During each 3-day period, all your meals will be provided, and they will be carefully planned to have the same energy and nutrients. One eating plan will involve eating only between 8 AM and 4 PM, and the other will be between 11 AM and 7 PM. You'll try both of these.
Before and during each 3-day eating period, you'll wear a small sensor on your arm (called a FreeStyle Libre 2) to continuously measure your blood sugar levels. You'll also wear a special wristband (a GENEActiv) to track your physical activity. Fasting blood samples will be taken before and after each eating plan to check your blood sugar and other related markers. You'll also be asked to keep a record of everything you eat and drink to help the researchers understand your habits. The study will run from July 2022 to July 2025.
Potential risks and benefits
Locations (1)
- Manchester Metropolitan UniversityApproximateManchester, United Kingdom
Common questions
What is time-restricted eating (TRE)?
Time-restricted eating means you limit when you eat your meals and snacks to a certain number of hours each day, for example, an 8-hour window.
Will I have to change what I eat?
During the 3-day eating periods, all your meals will be provided and planned for you, so you won't need to choose what to eat during those times.
What exactly will I wear?
You'll wear a small sensor on your arm to track blood sugar and a wristband to track your activity levels throughout the study periods.
Is this study safe for me?
The procedures are generally safe, with only minor discomfort from blood tests or wearing monitors. The researchers have carefully put all safety measures in place.
Where is this study happening?
The study is being managed by Manchester Metropolitan University (ManMet) in the UK.
How to find out more
Kelly Bowden Davies
Always speak to your GP or specialist before deciding to take part in a study.
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