Food Choices Could Play A Role In Pain Relief, But Scientists Urge Caution

Study Suggests Diet Quality Could Help Ease Or Prevent Everyday Aches

ADELAIDE, South Australia — When people improve their diet quality, chronic pain often decreases. These benefits, however, aren’t fully explained by changes in weight alone. A new study suggests that better food choices may play a role in reducing pain, though scientists emphasize the biological pathways are still unclear and the results were not conclusive.

Researchers at the University of South Australia tracked 104 overweight adults through a three-month dietary intervention and found that participants reported notable pain improvements. Half the group started with chronic musculoskeletal pain, but only about a quarter still had persistent pain after improving their diets. Statistical modeling suggested that diet quality improvements were associated with lower pain severity even after accounting for weight, waist size, and body fat. Still, the researchers caution that mediation models were “inconclusive” overall, and further studies are needed to confirm the connection.

For decades, doctors have recommended weight loss to patients with chronic pain, assuming that reducing pressure on joints and tissues would provide relief. While excess weight certainly contributes to pain, this research indicates that what people eat may also matter in its own right.

Understanding Chronic Musculoskeletal Pain

Chronic musculoskeletal pain refers to persistent aches in bones, joints, muscles, and connective tissues lasting three months or longer. Unlike temporary pain from injuries that heal, chronic pain often lingers without a clear cause, interfering with daily activities and ranking among the world’s leading contributors to disability.

The study participants reflected this reality. Nearly half reported chronic pain at the start, most commonly in the back and neck, with some also experiencing leg and foot pain. Their eating habits were poor overall, scoring a median of 45 out of 120 on a diet quality scale.

How the Diet Intervention Worked

Participants followed a structured eating plan that cut daily calories by about 30% while emphasizing foods recommended in Australian dietary guidelines. They ate more fruits, vegetables, whole grains, and lean proteins while cutting back on processed foods, added sugars, and alcohol.

After three months, diet quality scores improved by 22%. People were eating considerably more produce and lean proteins while cutting discretionary and high-calorie foods. They also lost an average of 7.1 kilograms (about 15.7 pounds) and reduced waist size and body fat percentage.

Pain levels improved overall. Chronic pain prevalence fell from 50% to 24%, and those still affected reported less severe discomfort and better quality of life. Pain severity scores dropped at specific body locations when compared over time.

The Surprising Research Finding

Scientists initially expected that weight loss would explain the pain improvements. Typically, less body weight means less stress on joints and tissues. But statistical analyses told a more complex story.

Diet quality itself appeared to play an independent role. In some analyses, improvements in eating habits were associated with lower pain severity, even after accounting for waist circumference and body fat. The authors emphasize, however, that mediation results were “inconclusive” overall, meaning not every analysis showed a clear independent effect.

This challenges long-standing assumptions about diet and pain. Rather than working only through weight reduction, nutrient-rich foods may also influence pain through other mechanisms.

One possibility is inflammation. Poor-quality diets and excess body fat are known to contribute to inflammation, which can worsen pain sensitivity. Fruits, vegetables, and other nutrient-dense foods provide compounds that may help counteract this. The study itself did not measure inflammatory biomarkers, so this explanation remains a hypothesis rather than a proven mechanism.

Another possibility is that certain nutrients affect the nervous system’s processing of pain signals, influencing how discomfort is perceived. More research is needed to explore these pathways directly.

Another Reason To Enjoy A Healthy Diet

For people living with chronic pain, these findings suggest that diet changes could provide benefits even when weight loss proves difficult. Instead of focusing solely on pounds lost, improving diet quality itself may be a valuable strategy for managing pain.

Still, the exact biological pathways remain unclear. Previous research has linked nutrient-rich diets to a reduced risk of chronic disease—even without weight loss—and this study adds tentative evidence that pain may be influenced in a similar way.

As with any study, there are caveats. Participants were only moderately overweight, so the results may not be applicable to individuals with significantly different body weights. The study lacked a control group that continued regular eating habits, which makes it harder to rule out other factors. COVID-19 restrictions interrupted some data collection, especially body composition measures. Importantly, researchers did not test for inflammatory biomarkers that could clarify the underlying biology. And since pain assessments relied on self-reporting over the previous 24 hours, some cases of chronic pain might have been missed.

Future research, utilizing larger groups, longer study periods, and biomarker testing, could help elucidate the relationship between diet quality and pain. For now, the evidence suggests that food choices are one piece of a larger puzzle in managing chronic pain.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making changes to your diet or treatment plan, especially if you live with chronic pain or other health conditions.