Daily Avocado May Slightly Reduce Heart Disease Risk, Study Finds
A new study from Penn State suggests that eating one avocado per day could lower LDL particle levels and reduce heart disease risk by an estimated 4% in adults with obesity.
Researchers at Penn State's Department of Nutritional Sciences have found that eating one avocado each day may modestly reduce heart disease risk in adults with obesity. The findings were published in the Journal of Clinical Lipidology.
The study linked daily avocado consumption to a lower concentration of low-density lipoprotein (LDL) particles in the blood. These particles carry cholesterol throughout the body. The reduction corresponded to an estimated 4% decrease in heart disease risk.
First author Janhavi Damani said that for people with obesity, adding avocados to their daily diet could be a good starting point, noting that making one small change might be more feasible than overhauling an entire diet.
LDL particles are not the same as LDL cholesterol, often called "bad cholesterol." Although both are associated with cardiovascular disease, particle concentration can reveal risks that a standard cholesterol test may miss. Since cholesterol needs protein particles to travel in the bloodstream, a person with more of these particles may face a greater heart disease risk even when their total LDL cholesterol level is identical to someone with fewer particles.
The team examined data from 786 participants in the six-month Habitual Diet and Avocado Trial. Participants were 25 years or older, with men having a waist circumference greater than 40 inches and women greater than 35 inches. Half continued their usual diet and activity, while the other half added one avocado per day.
Earlier results from the trial showed no effect on body weight or waist circumference but did show lower LDL cholesterol levels. In the current analysis, those assigned to eat a daily avocado saw LDL particle concentrations drop by 49 nanomoles per liter, translating to an estimated 4% lower heart disease risk. This is modest compared to the 14-29% risk reduction associated with overall dietary improvements, but it is still a step forward.
The benefit was consistent across sex, race, ethnicity, age, and body mass index. Senior author Kristina Petersen noted that previous Penn State research controlled participants' entire diets, whereas this study demonstrated benefits in real-world conditions where diets are less predictable. The researchers advised consulting a registered dietitian or physician before making dietary changes. The Avocado Nutrition Center supported the research.
