Many people feel tired much of the time.
Modern life often involves long work hours, family responsibilities, financial pressures, and constant digital distractions. Because of this, fatigue is usually blamed on stress, poor sleep, or a busy schedule.
While these factors certainly matter, researchers are finding that nutrition may also play an important role in how energetic and motivated people feel every day.
A new study from Osaka Metropolitan University suggests that low levels of two important vitamins may be linked to fatigue and reduced motivation, even in otherwise healthy adults. The research was led by Professor Hiroaki Kanouchi from the Graduate School of Human Life and Ecology and was published in the journal Nutrients.
The study focused on two vitamins that are essential for good health: folate, also known as vitamin B9, and vitamin B12. These nutrients help the body make healthy red blood cells, support the nervous system, and play a role in producing DNA. They are also involved in regulating a substance in the blood called homocysteine.
Homocysteine is a naturally occurring amino acid. Under normal conditions, the body keeps homocysteine levels under control with the help of vitamins such as folate and vitamin B12. However, when people do not get enough of these nutrients, homocysteine levels can rise.
For many years, high homocysteine levels have attracted attention because they have been linked to an increased risk of heart disease, stroke, dementia, and bone fractures. Scientists have generally focused on these serious long-term health risks.
The Japanese research team wanted to explore whether homocysteine might also be connected to something that affects people more immediately: their daily energy levels and motivation.
The researchers recruited around 600 healthy adults in Japan. Blood samples were collected to measure homocysteine, folate, and vitamin B12 levels. Participants were also asked to complete questionnaires designed to measure physical fatigue, mental tiredness, and motivation.
To make the results more reliable, the researchers considered other factors that could affect energy levels. These included age, sleep habits, workload, and eating patterns. By accounting for these influences, they hoped to better understand the specific relationship between vitamins, homocysteine, and fatigue.
The results revealed a clear pattern. Participants with higher homocysteine levels generally had lower levels of folate and vitamin B12. This relationship was observed in both men and women.
When the researchers looked more closely at fatigue symptoms, they discovered some interesting differences between the sexes. Men with higher homocysteine levels were more likely to report greater physical fatigue. Women with elevated homocysteine levels were more likely to report reduced motivation.
These findings suggest that vitamin deficiencies may influence how energetic people feel and how motivated they are to perform daily activities. Although the exact biological reasons remain unclear, researchers believe that insufficient folate and vitamin B12 may affect important processes in the brain and body that contribute to energy production and mental wellbeing.
Folate is found naturally in foods such as leafy green vegetables, beans, peas, lentils, oranges, and fortified cereals. Vitamin B12 is found mainly in animal-based foods, including meat, fish, eggs, dairy products, and some fortified foods.
Because vitamin B12 is less common in plant-based foods, people following strict vegetarian or vegan diets may need to pay particular attention to their intake.
The findings are important because fatigue is one of the most common health complaints worldwide. Many people assume that feeling tired is simply a normal part of modern life. However, in some cases, poor nutrition may be contributing to the problem.
This study is valuable because it examined healthy adults rather than people already diagnosed with illness. The researchers also adjusted for several important factors that influence fatigue, which strengthens the findings.
However, the study only identified an association and cannot prove that low folate or vitamin B12 directly caused fatigue or low motivation. Other factors may also be involved.
In addition, the research was conducted in a Japanese population, so future studies in other populations will be important. Nevertheless, the findings suggest that maintaining adequate levels of folate and vitamin B12 through a balanced diet may support both physical energy and mental motivation.
If you care about nutrition, please read studies about how Mediterranean diet could protect your brain health, and this plant nutrient could help reduce high blood pressure.
For more information about nutrition, please see recent studies that olive oil may help you live longer, and vitamin D could help lower the risk of autoimmune diseases.
