Does Diet Quality Impact Weight Change?

Diet quality is clearly important for human health.  Consuming a high quality diet provides us with the necessary amounts of macronutrients (protein, fats, carbohydrates) and micronutrients (vitamins, minerals) needed to sustain life and support normal health.  However, the relationship between diet quality and body weight is a little less clear.

A new nutrition study published online ahead of print in the Journal of Nutrition used data collected from the Framingham Offspring/Spouse Study to examine the impact of diet quality on body weight.  For this study, researchers determined the diet quality of more than 1,500 men and women over 30 years of age with a body mass index of at least 18.5.  In addition to diet quality, other possible predictors of weight change (age, exercise, smoking, etc) were examined.  The researchers reported:

• Among women, former smokers with poor diet quality gained more weight than former smokers with a good diet quality.
• Women who quit smoking during the study follow-up period gained the most weight.
• Among men, former smoking status was associated with greater weight gain.
• Older age was linked to lower amounts of weight gained in both men and women.
• Among women, increased levels of physical activity were also linked to lower amounts of weight gain. 

Based on these results, the researchers concluded that while diet quality is important, age, physical activity, weight fluctuation, and smoking status were stronger predictors of weight gain in this study population.  Overall, these are interesting study results that suggest men and women might have slightly different risk factors for weight gain.  Therefore, when developing personalized diet programs to either prevent weight gain or support healthy weight loss, it will likely be important to take gender and lifestyle into consideration.  This might be particularly true for smokers.  Since these results indicated that former smokers gained the most weight, more frequent interaction with former smokers starting a weight management program might be needed to provide a greater chance for overall success.  While diet quality did not effect weight gain as much as smoking status or some other factors, diet quality did interact with some of these other factors (especially smoking), making it an important component of on overall healthy weight management program.

My milk and soy protein bars and shakes contain 20 grams of high quality protein, making them an excellent and convenient part of my easy diet plan.