A study published June 12, 2026, in the Journal of Clinical Lipidology found that eating an avocado a day was associated with lower levels of LDL particles, a marker linked to heart disease risk, in people with obesity.
Researchers estimated that the change was equivalent to about a 4% reduction in heart disease risk. However, adding a daily avocado did not lead to weight loss or reduced waist circumference.
While experts say the findings are encouraging, they caution that avocados should be viewed as one part of an overall heart-healthy eating pattern rather than a standalone solution for reducing cardiovascular risk.
Examining the effects of avocados on heart disease risk
The study analyzed data from 786 adults ages 25 and older who participated in the 6-month Habitual Diet and Avocado Trial.
Males were eligible for the study if their waist circumference was at least 40 inches. For females, their waist circumference had to be at least 35 inches.
Half of the participants continued their usual diet and activity. The other half were instructed to eat one avocado each day while otherwise maintaining their usual diet and activity.
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