Have you ever wondered why some older adults age healthily and gracefully, while others, despite being vibrant in their youth, succumb to illnesses in their golden years or even pass away prematurely?
Over the years of working in the hospital, I’ve witnessed countless heartwarming cases.
Many people are curious about the secrets to longevity and healthy aging.
Especially those who are over 85 or even 90 years old, what do they eat? Do they have any common dietary habits?
High-GI Foods
Many seniors avoid or never eat foods with a high glycemic index (GI). This may come as a surprise as high-GI foods tend to look more appealing and indulgent.
However, it’s not that simple. The defining feature of high-GI foods is their ability to rapidly increase blood sugar levels, prompting the body to produce insulin. Prolonged blood sugar spikes, especially the overproduction of insulin when blood sugar is high, not only increase the risk of diabetes but can also accelerate aging.

I recall a middle-aged woman, a longtime nurse at the hospital. She shared that her mother lived to be 92, healthy and almost free of chronic illnesses. Remarkably, her mother’s diet was simple; she rarely ate refined sugar and almost never drank sugary beverages.
In fact, high-GI foods are directly linked to the rate of aging and the onset of certain chronic illnesses in the elderly. Thus, minimizing high-GI foods helps control blood sugar and contributes to slowing down the aging process.
White bread, desserts, and processed foods often contain excessive amounts of sugar. If you eat these foods daily, the blood sugar spikes will cause long-term damage to your blood vessels, and issues such as atherosclerosis or diabetes will easily develop.
Consuming too many high-GI foods places a significant burden on the elderly, affecting their quality of life.
Processed Meat
Another “silent killer” that can undermine the health of the elderly is processed meat.
Processed meats like sausages, bacon, and ham typically contain high levels of salt, additives, and preservatives. When seniors consume these foods over extended periods, it can lead not only to high blood pressure but also an increased risk of heart disease and stroke.
I once met an elderly gentleman who ate fast food almost year-round. He was obese, had high blood pressure, and suffered from diabetes. He told me that there was one item in his diet that he couldn’t resist—processed meat.

“Sausages can be a meal, so why not eat them?” he said.
However, the risks of processed meat cannot be overlooked. Numerous studies have shown that long-term consumption of these meat products makes seniors more susceptible to cardiovascular diseases as the salt and saturated fat content constricts blood vessels and raises blood pressure. Additionally, some chemicals in these meats can have negative long-term effects on the immune system.
These impacts often become apparent as people age. Many elderly patients presented with severe cases of hypertension and diabetes when they were admitted to the hospital.
Dairy Overload
Dairy products have long been regarded as an important source of calcium, but that doesn’t mean they suit everyone.
Particularly for some seniors, excessive dairy consumption can negatively impact bone health. The reason is that when you consume too much milk, the body can become acid-base imbalanced, leading to an accumulation of acidic substances. To neutralize these substances, the body releases calcium from the bones, accelerating osteoporosis.
I once treated an elderly woman who drank a lot of milk for many years. She thought milk was the way to supplement calcium until a bone density test revealed her bones had become very brittle. I had to inform her that her risk of bone fractures had significantly increased.
She was surprised to learn that dairy products aren’t always bone-friendly as she had assumed. Research shows that excessive dairy consumption can be detrimental to some seniors. While calcium benefits bones, combining it with excessive lactose and protein leads to reduced calcium absorption, accelerating osteoporosis.
Therefore, seniors should be cautious when choosing calcium supplements, as dairy may not suit everyone.
Refined Cereals
Refined cereals are another group of foods that many seniors avoid. Refined cereals like white rice, white flour, and instant noodles usually have low nutritional value and lack fiber, vitamins, and essential minerals.
Refined foods can cause rapid spikes in blood sugar, and if consumed over a long period, they can increase the risk of weight gain and disrupt metabolism, leading to diseases such as diabetes, heart disease, and stroke.
I once met a retired gentleman who used to work in construction. In his younger years, he worked hard, but later he changed his dietary habits and stopped eating white rice and white flour, opting for whole grains or mixed grain products instead.
This habit persisted for many years, and at 85, he remained healthy, free from diabetes or cardiovascular issues. His bloodwork showed normal results, especially stable blood sugar levels.
His secret was avoiding refined cereals and opting for natural, fiber-rich foods. Scientific research also indicates that consuming refined cereals can lead to nutritional deficiencies, particularly fiber, vitamin B, and mineral deficiencies, negatively impacting gut health and increasing the risk of cardiovascular disease.
Since gut health and the immune system are closely linked in the elderly, they should opt for fiber-rich foods like whole grains, brown rice, and oatmeal as much as possible.
These seemingly ordinary foods can accumulate into “invisible threats” to the health of the elderly, and their effects often insidiously impact the body when we least expect it. For those who age gracefully, the foods they avoid may be the key to their longevity.