Surprisingly unknown? Health trivia quiz. A multiple-choice (three options) mini knowledge quiz about health.

blue light

Blue light refers to the blue wavelengths emitted by LED displays such as those on computers and smartphones. Because it has a short wavelength and high energy, it is not absorbed by the cornea or lens and can reach the retina, which is why it is discussed as a type of light to be cautious about, as it is considered to cause eye fatigue, blurriness, and dryness. Prolonged exposure late at night can disrupt your internal body clock and may lead to sleep disorders, so caution is advised.

potato starch

When you have diarrhea, your digestive system is weakened, so foods that are easy to digest and gentle on the intestines are ideal. Potato starch is made from potato starch and is very easy to digest and absorb, making it gentle on the stomach and intestines. Adding thickness to dishes makes the texture smoother and helps retain warmth, which can gently warm the abdomen. It’s recommended to dissolve it in hot water or soup to add thickness, or drink it like kuzuyu to incorporate it.

pickled plum

The main cause of age-related body odor is a substance called nonenal, which is generated when sebum oxidizes. Umeboshi (pickled plums) are rich in citric acid, a powerful antioxidant, and ume lignans, a type of plant polyphenol. These components help prevent oxidation in the body and are expected to suppress the formation of nonenal at its source. For both odor control and overall health, why not try incorporating them smartly into your daily meals?

About 2 kcal

It’s said that each time you cough, your body burns about 2 kcal of energy. If you can’t stop coughing due to a cold or allergies and, for example, cough 100 times in a day, that alone would amount to roughly 200 kcal burned. That’s about the same as one rice ball (onigiri) or the calories burned during about an hour of light walking. This is why prolonged, intense coughing can significantly drain your energy and make you feel very fatigued.

3 hours ago

It’s generally said that it takes about three hours for food to be digested after a meal. Therefore, by finishing dinner at least three hours before bedtime, your digestive activity will have settled by the time you go to sleep, allowing your stomach and intestines to rest properly during the night. If you go to bed while digestion is still active, it can lower your sleep quality and may cause feelings of heaviness in the stomach or indigestion the next morning, so it’s considered important to keep this timing in mind when eating.

blood

Tears are originally made from blood. From the blood delivered to the lacrimal glands located above the eyes, red components such as red blood cells are removed, and only the filtered water and nutrients become tears. Therefore, like blood, tears contain salts such as sodium and proteins, and they play an important role in delivering oxygen and nutrients to the cornea.

25 or more

BMI is a body mass index widely used internationally, calculated by dividing body weight by the square of height. According to the Japan Society for the Study of Obesity’s criteria, obesity is defined as having a BMI of 25 or higher. It is known that when BMI exceeds 25, the statistical risk of lifestyle-related diseases such as dyslipidemia, diabetes, and hypertension increases. Reviewing daily diet and exercise habits and maintaining an appropriate body weight are extremely important for health.