Interaction Between White Potato Consumption and Meal Timing on Glycemic Response and Appetite in Adults
This study is investigating how eating white potatoes at different times of the day affects your blood sugar levels and how hungry you feel. Researchers want to find out if eating white potatoes, compared to other carbohydrate foods, can help you feel fuller for longer and reduce how much you eat afterwards. They are also curious if eating potatoes for breakfast might have a stronger effect on your hunger and overall food intake than eating them for dinner. This will help us understand more about how potatoes fit into a healthy diet and manage our appetite.
At a glance
What is this study about?
This study is all about understanding how white potatoes, a common food, affect our bodies. Specifically, it's looking at two main things: how our blood sugar levels change after eating potatoes, and how hungry or full we feel. The researchers are particularly interested in whether the time of day you eat potatoes makes a difference to these effects.
They believe that eating white potatoes might help you feel more satisfied and reduce how much food you eat overall, compared to meals with carbohydrates that don't raise blood sugar as much. Think of it as exploring whether a potato can be a good hunger-buster! They also wonder if having potatoes for breakfast could have an even bigger impact on keeping you full and reducing your food intake throughout the day, compared to eating them for dinner.
To figure this out, participants will eat different types of potato dishes, like oven-baked fries or home fries, along with an egg omelette. They'll also have a meal with a cauliflower alternative or no side dish as comparison. This will help the scientists get a clear picture of how different potato preparations and meal timings affect our bodies.
Key takeaways
- This study explores how white potatoes affect blood sugar and hunger.
- It tests different ways of cooking potatoes and eating times.
- Researchers want to see if potatoes help you feel fuller for longer.
- The study includes various potato dishes, a cauliflower option, and no side option.
- You'll wear a device to track your blood sugar levels.
- It aims to understand more about potatoes in a healthy diet.
Who may be eligible?
To join this study, you need to be a healthy adult between 18 and 65 years old. You should also have a healthy body weight, which means your Body Mass Index (BMI) should be between 18.5 and 24.9. This study is looking for people who are generally well and don't have certain health conditions.
You wouldn't be able to join if you have been diagnosed with diabetes, or if you have digestive, liver, or kidney problems. Also, if you've had a major operation or serious illness in the last six months, or if your weight has changed a lot recently, this study won't be right for you. If you're currently trying a specific diet, taking medications that might affect the study's results, or if you usually skip breakfast, you wouldn't be able to take part.
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 18 and 65 years old?
- Is your body weight in a healthy range (BMI 18.5-24.9)?
- Do you *not* have diabetes, or major digestive/liver/kidney issues?
- Have you *not* had any major surgery or illness in the last 6 months?
- Are you *not* on a specific diet or certain medications that might affect blood sugar or appetite?
- Do you usually eat breakfast?
What does participation involve?
If you decide to take part, you'll visit the study site for several separate morning sessions. During these visits, you'll be given an egg omelette with different side dishes, which could be various potato preparations (like oven-baked home fries or deep-fried fries), oven-baked cauliflower tots, or no side. These meals will be given to you in a random order each time, so neither you nor the researchers know which meal you're getting next. You won't be taking any new medication as part of this study.
Throughout the day of each visit, the researchers will check your blood sugar levels using a continuous glucose monitoring system, which gently sits on your skin to track your sugar levels. They'll also ask you about how hungry or full you feel. About two hours after your test meal, you'll be offered a lunch where you can eat as much as you like, to see how the morning meal affected your appetite. Your food intake for the rest of the day until bedtime will also be recorded. Each morning session will last for several hours, and you'll go home afterwards. The total duration of your involvement will depend on how many different test meals you need to try.
Potential risks and benefits
Locations (1)
- Centre for Urban Innovation (CUI-109), School of Nutrition, Toronto Metropolitan UniversityVerified postcodeToronto, Canada· Recruiting
Common questions
What exactly are 'glycemic response' and 'satiety'?
'Glycemic response' is how quickly and how much your blood sugar goes up after eating. 'Satiety' means feeling full and satisfied after a meal.
Will I have to eat deep-fried foods if I join?
Yes, one of the meals involves deep-fried, quick serve fries to compare its effects with other potato preparations.
Do I need to be a fan of potatoes to join this study?
Not necessarily, but you should be able to comfortably eat the different potato and non-potato meals provided in the study.
Will I know my own blood sugar results?
The study uses a continuous glucose monitor to track blood sugar, but the study description doesn't specify if individual results will be shared directly with participants during the study.
How long will each visit take?
Each morning visit will last for several hours, as measurements are taken at baseline and for 120 minutes after the meal, followed by a lunch and food intake tracking for the rest of the day.
How to find out more
Always speak to your GP or specialist before deciding to take part in a study.
Interested in taking part?
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