Many people often look for medical studies that highlight the discovery of “complex” pharmaceutical or surgical methods to treat or prevent health problems and diseases. However, the significance of medical research findings does not necessarily lie in complexity. Sometimes, simple everyday habits—easily within reach—can prove highly effective, as confirmed by accurate medical studies, while also offering major health benefits.
اضافة اعلان
A Japanese Study
For example, the results of a recent Japanese study indicated that preparing a home-cooked meal at least once a week may reduce the risk of dementia among older adults by 30 percent.
According to findings published online on March 24 in the Journal of Epidemiology & Community Health, part of the British Medical Journal (BMJ) Group, researchers from the Tokyo Institute of Science in Japan found that this risk could drop by as much as 70 percent among beginner older cooks—those with limited cooking skills and little prior experience in preparing meals.
The study was titled: “Home Cooking, Cooking Skills, and Dementia Requiring Long-Term Care: A Population-Based Cohort Study in Japan.”
In the introduction to their findings, the researchers explained:
“As populations age, the number of people living with dementia worldwide is expected to increase, placing enormous burdens on families, communities, social care systems, and long-term care costs.”
They also referred to the 2020 Lancet Commission report, which identified twelve modifiable risk factors for dementia and suggested that nearly 40 percent of dementia cases could be prevented or delayed. Most of these risk factors are linked to lifestyle habits such as diet and physical activity, making interventions targeting these areas extremely important.
For this reason, many medical observers consider this study highly significant and worthy of careful reading, especially because dementia remains one of the most serious diseases for which no highly effective drug treatment currently exists.
Simple Lifestyle Behaviors
This modern study also reinforces the importance of simple lifestyle behaviors in achieving major health outcomes.
The Japanese researchers noted:
“Over the past fifty years, people have increasingly relied on restaurants, takeout meals, ready-made foods, and frozen meals as their primary food sources, making home cooking less common. In a global survey conducted between 2018 and 2019 across 142 countries, adults—including older adults—cooked dinner at home only three times per week on average.”
They added that losing someone who prepares food—due to death, divorce, or other family changes—is common with aging. These changes may force older adults to start preparing their own meals later in life.
It was also found that older adults who had no one to cook for them were three times more likely to suffer from malnutrition if they had poor cooking skills.
Therefore, the health impact of cooking frequency may differ between those who already possess strong cooking skills and have cooked for years, and those with limited skills who begin cooking only in old age.
Better Diet Quality
The researchers further explained that, for people of all ages:
“Food preparation, including home cooking, is a lifestyle factor that can improve diet quality and promote physical activity.”
Evidence continues to grow regarding the nutritional benefits of home cooking, including:
Higher consumption of vegetables and fruits
Better adherence to the Mediterranean diet
Lower intake of ultra-processed industrial foods
Improved overall diet quality
All of these factors contribute positively to health.
In contrast, frequent dining out has been shown to reduce diet quality, increase calorie and fat intake, and raise the consumption of sugary drinks and alcohol—all of which are harmful to health.
A Cognitive Stimulus
For older adults specifically, food preparation is not only an important source of physical activity but also a cognitive stimulant.
The researchers explained:
“Cooking-related activities such as grocery shopping, meal preparation, and dishwashing are major physical activities for older adults.”
As professional physical activity declines after retirement, a larger share of physical movement comes from household tasks.
Shopping and meal preparation are among the most common household activities older adults participate in.
They added:
“Daily cooking activities provide important opportunities to stimulate cognitive abilities, as food preparation involves a sequence of cognitively complex, multi-step tasks.”
These include:
Meal planning: thinking about menus and ingredients
Selecting and purchasing ingredients: considering budget and expiration dates
The cooking process itself: transforming ingredients into a meal
Serving the meal
For this reason, the researchers wanted to determine whether the frequency of home cooking was associated with the prevalence of dementia, and whether this relationship depended on the level of cooking skills.
