Olive Oil & Weight Loss: Mediterranean Diet Expert Reveals ‘Liquid Gold’ Secret

In a world saturated with diet fads and the buzz around weight-loss medications, a simple kitchen staple is gaining renewed attention. Suzy Karadsheh, founder of The Mediterranean Dish and a celebrated Mediterranean cooking expert, champions extra virgin olive oil as a cornerstone of a healthy lifestyle – so much so, she consumes a shot of it daily. This isn’t about a quick fix, but a return to foundational dietary habits rooted in centuries of tradition.

The Mediterranean Diet’s ‘Liquid Gold’

Karadsheh, who grew up along the Mediterranean coast of Egypt and now resides in Atlanta, describes extra virgin olive oil as “liquid gold.” Her perspective isn’t new; the Mediterranean diet, rich in vegetables, legumes, whole grains, fish, and – crucially – healthy fats like olive oil, has long been associated with improved health outcomes, particularly heart health. Karadsheh’s message is about a simple swap: replacing less healthy fats with extra virgin olive oil. “You’ve just upgraded your diet by a lot, simply because you went from maybe saturated fats or something more processed to this liquid gold,” she explains.

Karadsheh is the author of two New York Times bestselling cookbooks and curates a line of Mediterranean pantry staples. Her approach centers on abundance – not restriction – and emphasizes the enjoyment of wholesome ingredients. She recalls people commenting on her generous use of olive oil, a practice she believed would eventually be understood for its benefits.

Olive Oil and the GLP-1 Connection: What’s the Science?

The recent surge in interest stems partly from a connection being made between olive oil and glucagon-like peptide-1 (GLP-1), a gut hormone that plays a role in regulating blood sugar, slowing digestion, and promoting feelings of fullness. GLP-1 is likewise the target of popular weight-loss drugs like Ozempic, and Wegovy. Some wellness advocates have even dubbed olive oil a “natural GLP-1,” but experts urge caution against oversimplification.

While research suggests a link, the effect of olive oil on GLP-1 release is far more modest and short-lived than that of pharmaceutical interventions. Dr. John La Puma, a board-certified internist and professionally trained chef, emphasizes that “olive oil GLP-1 release lasts minutes to hours, versus days for the drugs.” He points to studies showing that meals rich in olive oil and avocado can stimulate greater GLP-1 and peptide YY (PYY) release compared to meals high in solid fats, suggesting unsaturated fats may be more effective at stimulating these hormones. Though, he cautions against reducing complex biology to a single ingredient.

A 2021 review published in the International Journal of Molecular Sciences supports the idea that certain nutrients, including protein, fiber, and long-chain fatty acids (like those found in olive oil), can stimulate GLP-1 release. Earlier animal research, including a 2005 study in Endocrine, found that rats fed an olive oil-enriched diet had higher GLP-1 levels and improved glucose tolerance. It’s important to note that animal studies don’t always translate directly to human outcomes.

Beyond GLP-1: The Broader Health Benefits of Olive Oil

The benefits of olive oil extend beyond its potential impact on GLP-1. Rich in polyphenols and other beneficial compounds, olive oil supports overall health. Karadsheh believes it promotes fullness, reducing reliance on ultra-processed snacks. This aligns with the broader principles of the Mediterranean diet, which prioritizes whole, unprocessed foods.

Joseph Zucchi, a physician assistant specializing in obesity medicine, acknowledges a “tiny kernel of truth” to the olive oil claim, but stresses the short-lived nature of the effect. He explains that the body’s own GLP-1 is broken down within minutes, while GLP-1 medications are designed to remain active for days. However, he emphasizes that incorporating olive oil as a replacement for less healthy fats remains a valuable step towards improved metabolic health. Meals rich in olive oil can be a positive change.

What Does This Indicate for Your Diet?

The key takeaway isn’t necessarily to start taking daily shots of olive oil (though Karadsheh does), but to prioritize its inclusion in your diet as a primary fat source. Focus on making simple swaps – using olive oil for cooking, salad dressings, and even drizzling over vegetables. The emphasis, as Karadsheh points out, is on “upgrading” your diet, not eliminating entire food groups.

It’s also important to remember that olive oil is calorie-dense, so moderation is still key. While it offers health benefits, consuming excessive amounts can contribute to weight gain. Choosing high-quality extra virgin olive oil is also crucial, as processing can diminish its beneficial compounds. The Mediterranean Dish website offers resources and recipes focused on incorporating olive oil into a healthy lifestyle.

The Importance of a Holistic Approach

Experts agree that focusing on a single ingredient is insufficient for achieving optimal health. Dr. La Puma stresses the need to “fix the environment that broke people’s biology in the first place,” emphasizing the importance of a holistic approach that encompasses diet, physical activity, and lifestyle factors. Olive oil is a valuable component of this approach, but it’s not a magic bullet.

The conversation around olive oil and GLP-1 highlights the complex interplay between diet, hormones, and metabolic health. Further research is needed to fully understand the mechanisms involved and to determine the extent to which dietary interventions can mimic the effects of pharmaceutical treatments. For now, incorporating extra virgin olive oil into a balanced, Mediterranean-style diet remains a sensible and evidence-based strategy for promoting overall well-being.

Looking Ahead: Ongoing research will continue to explore the relationship between dietary fats, gut hormones, and metabolic health. Expect to see further studies investigating the specific effects of olive oil on GLP-1 release and its potential role in weight management and disease prevention. Public health guidance will likely evolve as new evidence emerges, but the core principles of a healthy, balanced diet – rich in whole foods and healthy fats – are likely to remain consistent.