People who eat more fruit and vegetables have better mental health, research finds.
Indeed, the more fruit and vegetables people eat, the better their state of mind.
Eating just one extra portion of fruit and vegetables per day is enough to measurably improve mental well-being.
Just one portion has the same positive effect as going for a walk on 8 extra days a month.
Only around one-in-ten people in the US eat the recommended amount of fruit and vegetables.
The recommended amount in the US is 1½ to 2 cups per day of fruit and 2 to 3 cups per day of vegetables.
Dr Neel Ocean, the study’s first author, said:
“It’s well-established that eating fruit and vegetables can benefit physical health.
Recently, newer studies have suggested that it may also benefit psychological well-being.
Our research builds on previous work in Australia and New Zealand by verifying this relationship using a much bigger UK sample.
While further work is needed to demonstrate cause and effect, the results are clear: people who do eat more fruit and vegetables report a higher level of mental well-being and life satisfaction than those who eat less.”
The study followed many thousands of people across seven years.
The study controlled for other factors, like lifestyle, education, health status and other aspects of the diet.
Dr Peter Howley, study co-author, said:
“There appears to be accumulating evidence for the psychological benefits of fruits and vegetables.
Despite this, the data show that the vast majority of people in the UK still consume less than their five-a-day.
Encouraging better dietary habits may not just be beneficial to physical health in the long run but may also improve mental well-being in the shorter term.”
The study was published in the journal Social Science & Medicine (Ocean et al., 2019).
April 8, 2021
Link Between Dietary Fiber And Depression
Partially Explained By Gut-Brain Interactions
New study suggests that higher daily dietary fiber intake is linked to lower risk for depression in premenopausal women
Fiber is a commonly recommended part of a healthy diet. That’s because it’s good for your health in so many ways – from weight management to reducing the risk of diabetes, heart disease, and some types of cancer. A new study also finds that it might be linked with a reduced risk of depression, especially in premenopausal women. Study results are published online in Menopause, the journal of The North American Menopause Society (NAMS).
Depression is a common and serious mental health condition that not only affects a person’s ability to perform daily activities but can also lead to suicide. It’s estimated that more than 264 million people worldwide have depression, with numbers increasing over time. This debilitating condition is much more common in women, and there are a number of theories as to why this is the case. Changes in hormone levels in perimenopausal women have been linked to depression.
Because of the serious consequences and prevalence of depression, numerous studies have been undertaken to evaluate treatment options beyond the use of antidepressants. Lifestyle interventions, including diet, exercise, and mindfulness, may help to reduce the risk for depression. In this new study involving more than 5,800 women of various ages, researchers specifically sought to investigate the relationship between dietary fiber intake and depression in women by menopause status. Dietary fiber is found mainly in fruit, vegetables, whole grains, and legumes.
Previous studies have already suggested the benefits of fiber for mental health, but this is the first known study to categorize the association in premenopausal and postmenopausal women. It also included a broader range of ages in participants and involved women who underwent natural, as well as surgical, menopause.
The study confirmed an inverse association between dietary-fiber intake and depression in premenopausal women after adjusting for other variables, but no significant difference was documented in postmenopausal women. Research has suggested that estrogen depletion may play a role in explaining why postmenopausal women don’t benefit as much from increased dietary fiber, because estrogen affects the balance of gut microorganisms found in premenopausal and postmenopausal women. The link between dietary fiber and depression may be partially explained by gut-brain interactions, because it is theorized that changes in gut-microbiota composition may affect neurotransmission. Fiber improves the richness and diversity of gut microbiota.
Results are published in the article “Inverse association between dietary fiber intake and depression in premenopausal women: a nationwide population-based survey.”
“This study highlights an important link between dietary fiber intake and depression, but the direction of the association is unclear in this observational study, such that women with better mental health may have had a healthier diet and consumed more fiber, or a higher dietary fiber intake may have contributed to improved brain health by modulating the gut microbiome or some combination. Nonetheless, it has never been more true that ‘you are what you eat,’ given that what we eat has a profound effect on the gut microbiome which appears to play a key role in health and disease,” says Dr. Stephanie Faubion, NAMS medical director.
Yunsun Kim, Minseok Hong, Seonah Kim, Woo-young Shin, Jung-ha Kim. Inverse association between dietary fiber intake and depression in premenopausal women. Menopause, 2020; Publish Ahead of Print DOI: 10.1097/GME.0000000000001711
January 6, 2021
Source: The North American Menopause Society (NAMS) www.sciencedaily.com