Home > Newsletters > Daily: Love or hate Earth Hour? > Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxic > Health-in-Motion 23 August 2017 bacteria that occur naturally in your digestive tract may affect your mood It may sound a little strange, but the bacteria that occur naturally in your digestive tract may affect your behaviour and your mood. A new study by Canadian scientists found that people with irritable bowel syndrome (IBS) who also suffer from depression can improve their mental health by taking probiotics. The research, which involved 44 adults with IBS and mild to moderate anxiety or depression, demonstrated a significant decline in the symptoms of depression after taking a daily dose of a probiotic called Bifidobacterium longum for six weeks. 0 More: Daily Dose: This is why your vanilla or cinnamon flavoured e-cigarette is toxicHealth-in-Motion advertisement Other news Diet and nutrition 9 common mistakes people make when it comes to weight loss, according to a celeb trainer Sex Is a chlamydia vaccine on the horizon? Medical Does having a hysterectomy put women at higher risk of developing depression and anxiety? Medical WATCH: Scientists develop vaccine to help stop cat allergies Medical Vitamin E oil might be cause of vaping-linked lung injuries Medical Could you be having a heart attack? Live healthier Heart health » 5 women share exactly what it feels like to have a heart attack 'I felt like I had a pill stuck in my throat.' Diet & Nutrition » 8 benefits of gherkin juice that will make you want to drink some ASAP Goodbye, salt craving.