A Healthy Diet May Ease Chronic Pain

By Pat Anson

We’ve all been told that eating a healthy diet and watching our weight are essential to good health.

What you may not know is that healthy eating can also reduce the severity of chronic pain, even if you are overweight or obese.

That’s one of the key findings from an Australian study that found a healthy diet was linked to less pain, especially among women, regardless of body weight.

"It's common knowledge that eating well is good for your health and well-being. But knowing that simple changes to your diet could offset chronic pain, could be life changing," said Sue Ward, PhD, a researcher at the University of South Australia and lead author of the study published in the journal Nutrition Research.

"Knowing that food choices and the overall quality of a person's diet will not only make a person healthier, but also help reduce their pain levels, is extremely valuable."

Warn and her colleagues analyzed data from 654 Australians who were surveyed about their health, fitness and eating habits. Over two-thirds were considered overweight (36%) or obese (35%), and had high levels of body fat (adipose tissue).

The participants’ diets were then compared with the Australian Dietary Guideline, which emphasizes the consumption of vegetables, fruit, lean meat, fish, legumes/beans, and low fat dairy products.

The researchers found that diet quality works differently in men and women. Women with better diets had lower pain levels and better physical function, an association that was much weaker for men.

Why Healthy Food Reduces Pain

It’s the anti-inflammatory and anti-oxidant properties of healthy food that appear to reduce pain.

"In our study, higher consumption of core foods — which are your vegetables, fruits, grains, lean meats, dairy and alternatives — was related to less pain, and this was regardless of body weight,” said Ward. "This is important because being overweight or obese is a known risk factor for chronic pain.

The findings are good news for people with pain who may struggle with their weight but are sedentary and unable to exercise. Having a few extra pounds will not inhibit the pain-reducing effect of a healthy diet.

“Despite high levels of adiposity in the study population, and the potential for excess adipose tissue to contribute to inflammation, risk for pain, and impact on physical function, there was limited evidence for adiposity mediating relationships between diet quality and pain or physical function,” researchers concluded.

“Recognizing dietary intake as a relevant aspect in assessing and managing pain holds importance in the context of overweight and obesity. In situations where long-term weight loss may not be feasible, attainable, or even desirable, people may show a greater inclination to adopt healthful dietary modifications that could potentially impact their pain.”

The research adds to a growing body of evidence suggesting that high fat Western diets can make pain worse. A recent study found that foods high in saturated fat and low in fiber can trigger an immune system response that can lead to rheumatoid arthritis (RA).

High fiber diets reduce the risk of obesity, diabetes and cardiovascular diseases, while promoting the growth of healthy bacteria that slow the progression of RA and reduce joint pain.

Losing Weight Helps Lower Pain Levels

By Pat Anson, Editor

Those of us who made a New Year’s resolution to lose weight have a little more incentive to keep our pledge – thanks to new research showing that even a small weight loss reduces overall body pain, as well as fatigue and depression.

The University of Michigan study, published in The Journal of Pain, involved 123 obese participants who were put on a low-calorie liquid diet for 12 weeks and asked to gradually increase their physical activity. The goal was to lose at least 10 percent of their body weight.

“It’s been known for some time that people who are obese tend to have higher levels of pain, generally speaking,” says Andrew Schrepf, PhD, a research investigator at Michigan Medicine’s Chronic Pain and Fatigue Research Center. “But the assumption has always been the pain is going to be in the knees, hips and lower back — parts of the body that are weight-bearing.”

Schrepf and his colleagues found that losing weight not only lowered pain levels in the knees and hips, but in unexpected areas such as the abdomen, arm, chest and jaw. Study participants who could reach the goal of losing 10% of their weight also reported better mental health, improved cognition and more energy. Men in particular showed improvements in their energy levels.

The results are significant because previous research hasn’t shown how weight loss affects widespread pain throughout the body.

“We know when people lose a lot of weight they tend to feel better,” Schrepf says. “But astonishingly, no one ever looked at where in the body the pain gets better.”

Researchers surveyed participants about their pain and other symptoms before and after the 12 week diet, using fibromyalgia assessment criteria to make their determinations. Participants were also evaluated and counseled by physicians and dietitians who specialize in endocrinology and obesity medicine.

Of the 123 participants, 99 were able to lose 10 percent or more of their body weight.

“The focus in the program is on calorie restriction and long-term weight loss, although all patients are encouraged to get more physically active for the other health benefits that exercise provides,” says Amy Rothberg, MD, an associate professor of endocrinology nutritional sciences at U-M. “The truth is people are, paradoxically, far more energetic on a low-energy diet and find after they begin losing weight that they can do more and are more physically active.”

Participants who met the weight loss goal reported widespread improvement in pain compared to those who did not. Their blood samples also showed a spike in anti-inflammatory molecules — a key weapon in fighting many types of pain. Researchers say the widespread improvement in body pain suggests that joints aren’t the only conduit of chronic pain.

“What we think that means is this process of losing weight may be affecting the central mechanisms of pain control related to the brain and spinal cord,” said Schrepf.

In future research, the team hopes to better understand why losing 10% of body weight was the dividing line for reduced pain.

“Some of your earliest weight loss isn’t all fat; it could be water,” Schrepf says. “Somewhere around 10 percent we’re reaching some kind of critical mass, but it’s hard to know exactly what that means.”