The habit of saving leftovers can be harmful
Excessive penny-pinching and eating leftovers, especially some seemingly harmless small habits, often silently take a toll on health. (Photo: ITN)
Some people constantly worry about waste, especially leftovers—feeling it is wasteful to throw food away each time they cannot finish it, so they store it all in the refrigerator planning to eat it next time. In reality, some thrifty habits can silently harm our health and are even linked to certain diseases, particularly the risk of cancer.
According to doctors' clinical experience, the medical histories of many patients often share a common thread: extreme frugality, eating leftovers, and particularly several seemingly harmless small habits that silently undermine health.
Eating leftover rice and leftover food
There was a patient who always tried to eat leftover rice and leftover food. Sometimes, half a bowl of rice left over from a meal or a few cold pieces of meat would be carefully put into the refrigerator, as she always thought being thrifty was very important, especially in these times of rising prices.
Until one day, she went to the hospital due to persistent abdominal pain and was diagnosed with stomach cancer. Through a detailed medical history investigation, the doctor realized that her stomach problem was closely linked to frequently eating overnight leftovers.
One cause of stomach cancer is Helicobacter pylori infection. These bacteria thrive easily on food when it is stored for too long, especially under improper storage conditions.
Even if you store food in the refrigerator, bacteria can still multiply, releasing carcinogens when the food is reheated. Long-term consumption of such unhygienic foods can lead to chronic gastritis and even progress to stomach cancer.
In fact, not only stomach cancer, but many digestive system cancers are closely linked to improper dietary habits. Many patients show no clear symptoms in the early stages; only when the disease reaches an advanced stage do they regret not paying attention to food safety earlier.
Many people have the habit of leaving leftovers in the refrigerator, thinking this can extend the shelf life of food. In reality, doing so not only alters the food's nutritional composition but can also lead to the accumulation of harmful substances in the food, negatively affecting health.
Refrigerated and frozen food
Another harmful effect of leftovers relates to mold growth; mold spores are very stubborn, and even at low temperatures, certain types of mold can still grow and proliferate on food, especially in humid environments.
There was a patient who developed esophageal cancer from eating moldy leftovers over an extended period. This patient had a habit of keeping leftover rice and food in the refrigerator, sometimes even storing food for several days.
As a result, mold spores in food enter the digestive tract and accumulate over time, ultimately causing changes in esophageal cells and progressing into cancer.
Mold not only affects the sensory quality and nutritional value of food, but more alarmingly, the toxins it secretes. If these toxins enter the body, they can not only impair liver function but also lead to various types of cancer.
Common mycotoxins such as aflatoxin have been confirmed as carcinogens. Aflatoxin is particularly harmful to the liver; if the body ingests food containing this toxin over an extended period, liver cells will be severely damaged and may even progress to liver cancer.
Reheating food
Besides how food is stored, another commonly overlooked issue related to excessive frugality is reheating methods. To cut down on waste, many families often reheat leftover rice and food for consumption.
However, reheating starchy foods such as rice and noodles multiple times alters their chemical composition, thereby creating health risks.
Reusing cooking oil
In everyday family cooking, another notable manifestation of frugality is reusing cooking oil. When stir-frying or deep-frying, many families feel that leftover oil is wasteful and often make a habit of reusing it.
However, this practice can lead to greater health problems. When cooking, overheating oil causes it to oxidize and produce harmful compounds. In particular, reusing oil multiple times increases the accumulation of these harmful substances, elevating the risk of cardiovascular diseases, brain disorders, and cancer.