Many people rely on convenient foods in their daily lives. Busy schedules, long work hours, and limited time for cooking often lead people to choose quick meals such as flavored yogurts, frozen pizzas, instant noodles, packaged breakfast cereals, and snack foods.
These items are known as ultra‑processed foods. They are designed to be easy to prepare, inexpensive, and ready to eat within minutes. Because of this convenience, they have become a major part of modern diets in many countries.
However, scientists have been growing increasingly concerned about the health effects of these foods. In recent years, studies have linked high consumption of ultra‑processed foods to several health problems. These include obesity, diabetes, heart disease, and certain types of cancer. Now, a new study suggests that these foods may also harm bone health.
The research was conducted by scientists at Tulane University in the United States. The findings were published in the scientific journal The British Journal of Nutrition. The researchers discovered that people who eat more ultra‑processed foods tend to have lower bone mineral density and a higher risk of hip fractures.
Bone mineral density refers to the amount of minerals, mainly calcium and phosphorus, that are present in bones. Strong bones contain high levels of these minerals. When bone mineral density decreases, bones become weaker and more fragile.
This increases the risk of fractures, especially in important areas such as the hip or spine. Hip fractures are particularly serious because they can lead to long hospital stays, reduced mobility, and sometimes long‑term disability in older adults.
To explore the connection between diet and bone health, the researchers analyzed data from more than 160,000 participants in the UK Biobank.
The UK Biobank is a large long‑term health research project that collects medical information from hundreds of thousands of people in the United Kingdom. It allows scientists to study how lifestyle habits, genetics, and environmental factors affect health over many years.
In this study, participants were followed for more than twelve years. During that time, researchers examined their eating habits and tracked changes in bone mineral density as well as the occurrence of hip fractures.
On average, participants consumed about eight servings of ultra‑processed foods each day. These servings could include foods such as packaged snacks, sugary drinks, frozen meals, cookies, or other industrially produced items.
The researchers calculated that for every additional 3.7 servings of ultra‑processed foods eaten per day, the risk of hip fracture increased by about 10.5 percent. In everyday terms, that amount could represent a frozen dinner, a cookie, and a soda added to the daily diet.
The scientists also measured bone mineral density in several important parts of the body. They found that higher consumption of ultra‑processed foods was linked to lower bone mineral density in the upper femur, which is the upper part of the thigh bone that connects to the hip joint.
They also observed lower bone density in the lumbar spine, the lower part of the back that supports much of the body’s weight.
Professor Lu Qi from the Celia Scott Weatherhead School of Public Health and Tropical Medicine at Tulane University explained that this study provides new evidence about how diet may influence bone health.
According to Qi, previous research had suggested a possible connection between ultra‑processed foods and bone problems, but this study is one of the first to examine the relationship directly in humans using such a large group of participants.
Ultra‑processed foods are usually made through industrial manufacturing processes. They often contain large amounts of added sugar, salt, unhealthy fats, and artificial ingredients such as preservatives, colorings, and flavor enhancers.
These foods are typically energy‑dense but low in essential nutrients. In other words, they provide many calories but relatively few vitamins and minerals that the body needs for healthy bones.
Whole foods, by contrast, are foods that remain close to their natural state and contain few or no additives. Examples include fruits, vegetables, whole grains, nuts, seeds, eggs, fish, and fresh meats. These foods provide nutrients such as calcium, vitamin D, magnesium, and protein, all of which are important for maintaining strong bones.
The researchers found that the negative relationship between ultra‑processed foods and bone density was especially clear among people younger than 65 years old and among those who were underweight.
People with a body mass index below 18.5 already face a higher risk of bone problems, and consuming large amounts of ultra‑processed foods may worsen that risk.
The researchers suggested that younger adults may absorb more of the harmful ingredients found in these foods because their digestive systems are more active. This may partly explain why the association appeared stronger in this group.
The study also builds on earlier research in this area. A study published in 2024 reported that high consumption of ultra‑processed foods was associated with an increased risk of osteoporosis, a disease that weakens bones.
Another study conducted in 2016 found that infants whose mothers lived closer to fast‑food restaurants tended to have lower bone mineral content.
Today, ultra‑processed foods make up a large portion of the modern diet. According to data from the U.S. Centers for Disease Control and Prevention, these foods account for about 55 percent of total calories consumed by children and adults. They are especially common in households with limited income because they are often cheaper and easier to store than fresh foods.
Professor Qi noted that these foods are widely available in grocery stores and convenience shops, making them difficult to avoid. However, the findings of this study add to growing concerns about their long‑term health effects.
When reviewing the results of this research, it is important to understand that the study shows an association rather than direct proof that ultra‑processed foods cause weaker bones. Other lifestyle factors may also play a role.
For example, people who eat more ultra‑processed foods may also exercise less or consume fewer nutrient‑rich foods that support bone health. Nevertheless, the very large sample size and the long follow‑up period strengthen the reliability of the findings.
Overall, the study highlights the importance of balanced nutrition for maintaining strong bones. Diets rich in whole foods such as vegetables, fruits, dairy products, nuts, and fish provide essential nutrients that help build and maintain bone strength throughout life.
Reducing the intake of heavily processed foods may therefore be an important step in protecting long‑term bone health.
If you care about bone health, please read studies that plant-based diets can harm your bone health without these nutrients, and this bone problem may strongly increase COVID-19 death risk.
For more health information, please see recent studies that too much of this vitamin may increase your risk of bone fractures, and results showing this type of exercise may protect your bone health, slow down bone aging.
The research findings can be found in The British Journal of Nutrition.
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