Daily Avocado Consumption Linked to Reduced Heart Disease Risk: Study - Video

What if your heart's new best friend is hiding behind a toast topping?

Eating just one avocado a day may modestly improve heart health in adults with obesity by lowering harmful cholesterol-carrying particles, according to a new study published in the Journal of Clinical Lipidology.

Researchers from Penn State found that daily avocado consumption reduced the concentration of low-density lipoprotein (LDL) particles in the blood. Unlike standard LDL cholesterol tests, LDL particle count provides a more detailed picture of cardiovascular risk because these particles transport cholesterol through the bloodstream. A higher number of LDL particles, particularly smaller ones, increases the likelihood of plaque building up inside arteries.

The study analyzed data from 786 adults enrolled in the six-month Habitual Diet and Avocado Trial. Participants had abdominal obesity, with men having a waist circumference above 40 inches and women above 35 inches. Half of the participants continued their usual diet and lifestyle, while the other half also maintained their normal routines but added one avocado every day.

By the end of the study, those eating a daily avocado showed a reduction of 49 nanomoles per liter in LDL particle concentration, a change researchers estimated could translate into about a 4% lower risk of heart disease.

However, eating an avocado every day did not reduce body weight or waist circumference, confirming that its benefits were linked to cholesterol-related changes rather than weight loss.

Researchers say the findings demonstrate that even a simple dietary change can improve one marker of cardiovascular health under real-world conditions, without requiring people to overhaul their entire diet.

While the reduction in heart disease risk was modest compared with broader healthy eating patterns, the team believes adding an avocado to a balanced diet could be a practical first step for adults with obesity looking to improve heart health. They recommend consulting a healthcare professional before making major dietary changes.

REFERENCE: Janhavi J. Damani, et al.; Effect of incorporating 1 avocado per day on lipoprotein particle concentrations compared to habitual intake in adults with abdominal obesity: An ancillary study of the Habitual Diet and Avocado Trial, a randomized controlled trial. Journal of Clinical Lipidology, 2026; DOI: 10.1016/j.jacl.2026.06.005