Cracking the code of cognitive health: Regular nut consumption tied to sharper minds | Canada News Media
Connect with us

Health

Cracking the code of cognitive health: Regular nut consumption tied to sharper minds

Published

 on

A recent study published in The American Journal of Clinical Nutrition investigates the associations between nut consumption and changes in cognitive performance.

Study: Higher versus lower nut consumption and changes in cognitive performance over two years in a population at risk of cognitive decline: a cohort study. Image Credit: CreatoraLab / Shutterstock.com

Are nuts good for brain health?

Diet is considered a major modifiable lifestyle factor and plays a vital role in regulating other risk factors for certain health conditions.

Peanuts and tree nuts are enriched with nutrients and have anti-inflammatory and antioxidant properties. In fact, the various nutrients and active compounds present in nuts can also elicit neuroprotective effects. Nevertheless, there is limited epidemiologic evidence for the associations between nut intake and cognitive performance.

While many cross-sectional studies support that cognitive function and nut consumption are positively related, prospective studies and randomized controlled trials (RCTs) have reported mixed results. Thus, existing evidence of the impact of nut intake on cognitive performance remains inconclusive.

About the study

In the present study, researchers prospectively assess the associations between the consumption of nuts and two-year changes in cognitive performance in a Spanish cohort of older adults at risk of cognitive decline. Obese or overweight community-dwelling individuals between 55 and 75 years of age with metabolic syndrome at baseline were eligible for inclusion.

Participants completed a food-frequency questionnaire that assessed the habitual intake of different food items in the past year. Nut consumption was stratified as less than one serving each week, one to two servings each week, three to six servings each week, and seven or more servings each week. Trained personnel assessed cognitive performance at baseline and after two years.

Eight neuropsychological tests were administered during personal interviews. Cognitive tests were standardized to a z-score for each participant using mean and standard deviation of baseline data.

The difference between scores was estimated to explore cognitive performance changes. Composite measures for a global assessment of cognitive function and three cognitive domains, including general cognition, executive function, and attention, were calculated.

The primary outcome was the two-year changes in the composite scores. Data on sociodemographics, lifestyle, food consumption, medical history, and anthropometrics were obtained at baseline.

Depressive symptoms were assessed using the Beck Depression Inventory. The associations of nut consumption with two-year cognitive function changes were examined using multivariable linear regression models.

Study findings

The study included 6,630 participants with an average of 65, with females representing 48.4% of the study cohort. The daily average nut consumption was 1.7 g and 43.7 g in the lowest and highest consumption categories at baseline, respectively, with walnuts being the most consumed. Individuals with the highest consumption had higher education, better Mediterranean diet adherence, and higher physical activity than those with the lowest intake.

Furthermore, there were fewer current smokers and depressive individuals in the highest consumption category. Participants with the highest intake also had a lower waist circumference and body mass index (BMI) than those with the lowest intake.

A positive association between nut consumption and two-year cognitive performance changes was observed. In multivariable models, a one-serving of nuts daily was associated with more favorable changes in the general cognitive function and clock drawing test (CDT).

Participants consuming three to six servings of nuts every week had better evolution of cognitive performance at two years than those consuming less than one serving each week. This finding was not observed for the highest category of nut consumption. The associations between nut intake and two-year cognitive changes were similar in sensitivity analyses.

The researchers did not observe significant interactions of nut intake with education level, sex, smoking status, hypertension, hypercholesterolemia, or type 2 diabetes. The stratified analysis revealed an association between more frequent nut consumption and less cognitive decline only in those with depressive symptoms at baseline.

Conclusions

In the current study, higher nut consumption was associated with more favorable changes in CDT and general cognitive function, thus indicating a potential dose-response association. Synergistic interactions between depression and nut intake were also observed, which implies that individuals with depressive symptoms at baseline were likely to benefit more from nut consumption.

Taken together, higher nut consumption might delay cognitive decline over two years in older, overweight, or obese adults with metabolic syndrome. Nevertheless, additional epidemiologic and clinical studies are needed to corroborate these findings before dietary recommendations can be made for delaying or preventing dementia and cognitive impairment.

Journal reference:
  • Ni, J., Nishi, S. K., Babio, N., et al. (2023). Higher versus lower nut consumption and changes in cognitive performance over two years in a population at risk of cognitive decline: a cohort study. The American Journal of Clinical Nutrition. doi:10.1016/j.ajcnut.2023.05.032

 

Source link

Continue Reading

Health

Canada to donate up to 200,000 vaccine doses to combat mpox outbreaks in Africa

Published

 on

 

The Canadian government says it will donate up to 200,000 vaccine doses to fight the mpox outbreak in Congo and other African countries.

It says the donated doses of Imvamune will come from Canada’s existing supply and will not affect the country’s preparedness for mpox cases in this country.

Minister of Health Mark Holland says the donation “will help to protect those in the most affected regions of Africa and will help prevent further spread of the virus.”

Dr. Madhukar Pai, Canada research chair in epidemiology and global health, says although the donation is welcome, it is a very small portion of the estimated 10 million vaccine doses needed to control the outbreak.

Vaccine donations from wealthier countries have only recently started arriving in Africa, almost a month after the World Health Organization declared the mpox outbreak a public health emergency of international concern.

A few days after the declaration in August, Global Affairs Canada announced a contribution of $1 million for mpox surveillance, diagnostic tools, research and community awareness in Africa.

On Thursday, the Africa Centres for Disease Control and Prevention said mpox is still on the rise and that testing rates are “insufficient” across the continent.

Jason Kindrachuk, Canada research chair in emerging viruses at the University of Manitoba, said donating vaccines, in addition to supporting surveillance and diagnostic tests, is “massively important.”

But Kindrachuk, who has worked on the ground in Congo during the epidemic, also said that the international response to the mpox outbreak is “better late than never (but) better never late.”

“It would have been fantastic for us globally to not be in this position by having provided doses a much, much longer time prior than when we are,” he said, noting that the outbreak of clade I mpox in Congo started in early 2023.

Clade II mpox, endemic in regions of West Africa, came to the world’s attention even earlier — in 2022 — as that strain of virus spread to other countries, including Canada.

Two doses are recommended for mpox vaccination, so the donation may only benefit 100,000 people, Pai said.

Pai questioned whether Canada is contributing enough, as the federal government hasn’t said what percentage of its mpox vaccine stockpile it is donating.

“Small donations are simply not going to help end this crisis. We need to show greater solidarity and support,” he said in an email.

“That is the biggest lesson from the COVID-19 pandemic — our collective safety is tied with that of other nations.”

This report by The Canadian Press was first published Sept. 13, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Health

How many Nova Scotians are on the doctor wait-list? Number hit 160,000 in June

Published

 on

 

HALIFAX – The Nova Scotia government says it could be months before it reveals how many people are on the wait-list for a family doctor.

The head of the province’s health authority told reporters Wednesday that the government won’t release updated data until the 160,000 people who were on the wait-list in June are contacted to verify whether they still need primary care.

Karen Oldfield said Nova Scotia Health is working on validating the primary care wait-list data before posting new numbers, and that work may take a matter of months. The most recent public wait-list figures are from June 1, when 160,234 people, or about 16 per cent of the population, were on it.

“It’s going to take time to make 160,000 calls,” Oldfield said. “We are not talking weeks, we are talking months.”

The interim CEO and president of Nova Scotia Health said people on the list are being asked where they live, whether they still need a family doctor, and to give an update on their health.

A spokesperson with the province’s Health Department says the government and its health authority are “working hard” to turn the wait-list registry into a useful tool, adding that the data will be shared once it is validated.

Nova Scotia’s NDP are calling on Premier Tim Houston to immediately release statistics on how many people are looking for a family doctor. On Tuesday, the NDP introduced a bill that would require the health minister to make the number public every month.

“It is unacceptable for the list to be more than three months out of date,” NDP Leader Claudia Chender said Tuesday.

Chender said releasing this data regularly is vital so Nova Scotians can track the government’s progress on its main 2021 campaign promise: fixing health care.

The number of people in need of a family doctor has more than doubled between the 2021 summer election campaign and June 2024. Since September 2021 about 300 doctors have been added to the provincial health system, the Health Department said.

“We’ll know if Tim Houston is keeping his 2021 election promise to fix health care when Nova Scotians are attached to primary care,” Chender said.

This report by The Canadian Press was first published Sept. 11, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Health

Newfoundland and Labrador monitoring rise in whooping cough cases: medical officer

Published

 on

 

ST. JOHN’S, N.L. – Newfoundland and Labrador‘s chief medical officer is monitoring the rise of whooping cough infections across the province as cases of the highly contagious disease continue to grow across Canada.

Dr. Janice Fitzgerald says that so far this year, the province has recorded 230 confirmed cases of the vaccine-preventable respiratory tract infection, also known as pertussis.

Late last month, Quebec reported more than 11,000 cases during the same time period, while Ontario counted 470 cases, well above the five-year average of 98. In Quebec, the majority of patients are between the ages of 10 and 14.

Meanwhile, New Brunswick has declared a whooping cough outbreak across the province. A total of 141 cases were reported by last month, exceeding the five-year average of 34.

The disease can lead to severe complications among vulnerable populations including infants, who are at the highest risk of suffering from complications like pneumonia and seizures. Symptoms may start with a runny nose, mild fever and cough, then progress to severe coughing accompanied by a distinctive “whooping” sound during inhalation.

“The public, especially pregnant people and those in close contact with infants, are encouraged to be aware of symptoms related to pertussis and to ensure vaccinations are up to date,” Newfoundland and Labrador’s Health Department said in a statement.

Whooping cough can be treated with antibiotics, but vaccination is the most effective way to control the spread of the disease. As a result, the province has expanded immunization efforts this school year. While booster doses are already offered in Grade 9, the vaccine is now being offered to Grade 8 students as well.

Public health officials say whooping cough is a cyclical disease that increases every two to five or six years.

Meanwhile, New Brunswick’s acting chief medical officer of health expects the current case count to get worse before tapering off.

A rise in whooping cough cases has also been reported in the United States and elsewhere. The Pan American Health Organization issued an alert in July encouraging countries to ramp up their surveillance and vaccination coverage.

This report by The Canadian Press was first published Sept. 10, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version