Probiotics for Depressive Symptomatology and Neural Activity.
This study aims to discover if taking a specific probiotic supplement helps people experiencing mild to moderate depression. For 16 weeks, some participants will receive the probiotic, while others get a placebo (a dummy pill that looks, smells, and tastes the same). Researchers will measure mood, depressive feelings, focus, memory, and brain activity at the start, after 24 hours, and again after 16 weeks. They want to see if the probiotic can improve how people cope with difficult feelings and perform on thinking tasks, and how it affects brain signals related to attention and memory. The study helps us understand if gut health might play a role in mental well-being.
At a glance
What is this study about?
This study is looking into whether a special probiotic called Ecologic® Barrier can help people who are feeling mildly to moderately depressed. Many people experience depression, and scientists are increasingly interested in how our gut health—the balance of good and bad bacteria in our stomachs—might affect our brains and moods. This research wants to see if adding this specific probiotic can make a positive difference.
Over 16 weeks, some people in the study will take the probiotic, while others will take a 'dummy pill' called a placebo. The placebo looks, tastes, and smells exactly like the probiotic, so no one will know which one they are taking. This is a common way to test new treatments to make sure any improvements are really due to the probiotic and not just the expectation of feeling better. Researchers will carefully check how participants are feeling, how their brains are working, and how well they can focus and remember things at different times during the study.
The main aim is to find out if the probiotic can help improve depressive symptoms, make people better at handling difficult thoughts, and boost their thinking skills like memory and attention. They will also be looking at how the brain responds to certain tasks, using a special test called an EEG, which measures brain waves. By gathering this information, the study hopes to shed light on whether probiotics could be a useful support for mental well-being in the future.
Key takeaways
- This study explores if a specific probiotic can help mild to moderate depression.
- Participation involves taking a sachet daily for 16 weeks.
- Researchers will check mood, thinking skills, and brain activity.
- You might receive the probiotic or a dummy powder (placebo).
- Results could help us understand how gut health affects mental well-being.
- You can leave the study at any time without any questions.
Who may be eligible?
This study is looking for men and women between the ages of 25 and 40 who are experiencing mild to moderate depression. You'll need to be right-handed, as this is important for the brain activity measurements they'll be taking.
There are several reasons why you might not be able to join. For example, if you've recently taken antidepressants, been to therapy or counselling, or if you have a long-term health condition like diabetes. You also can't have recently used antibiotics, laxatives, or other probiotics. It's important that you're not currently smoking or following very strict diets, as these can affect the results. If you have any serious gut problems or have had certain surgeries, you also won'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.
- Am I between 25 and 40 years old?
- Do I experience mild to moderate depression?
- Am I right-handed?
- Have I avoided taking antidepressants for at least 2 months?
- Have I avoided therapy/counselling for at least 1 month?
- Have I avoided antibiotics, laxatives, or other probiotics for at least 3 months?
What does participation involve?
If you decide to take part, you'll be assigned to either take one sachet of the probiotic or one sachet of a placebo (a dummy powder) every day for 16 weeks. You won't know which one you're getting, and neither will the researchers. You'll have three main visits or assessment points:
* **At the start (baseline):** You'll have an initial check-up where researchers will measure your mood, depression symptoms, and test your thinking skills and brain activity. * **After 24 hours:** There will be a quick follow-up to see any very early changes. * **After 16 weeks:** You'll have a final set of assessments, similar to the start, to see how things have changed over the whole study period.
During these assessments, you'll answer questions about your mood and feelings. You'll also do some computer-based tasks to test your memory and focus. For the brain activity part, you'll have small sensors placed on your head (EEG) while you do some of these tasks – this is harmless and just records your brain's electrical signals. The total duration of your active involvement in the study will be 16 weeks of taking the assigned powder, with these three assessment points spread throughout.
Potential risks and benefits
Locations (1)
- School of Psychology and Clinical LanguagesVerified postcodeLondon, United Kingdom
Common questions
What is a probiotic?
Probiotics are live bacteria and yeasts that are good for your health, especially your digestive system. They're often called 'good' or 'friendly' bacteria.
What is a placebo?
A placebo is a 'dummy' product, like a pill or powder, that looks and tastes exactly like the actual treatment, but contains no active ingredients. It's used to compare against the real treatment to see if it truly works.
What is an EEG?
EEG stands for electroencephalography. It's a safe and painless test that measures the electrical activity in your brain using small sensors placed on your scalp.
Will I know if I'm getting the probiotic or the placebo?
No, neither you nor the researchers will know whether you're taking the probiotic or the placebo until after the study has finished. This is called 'double-blind' and helps make the results fair.
How long will I need to be in the study?
You will be in the study for a total of 16 weeks, during which you'll take the assigned powder daily and attend three assessment appointments.
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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