Olive Oil and Weight Loss: Does it Cause Weight Gain or Help You Lose Weight?

Extra virgin olive oil and weight loss seem contradictory — a caloric fat that helps you lose weight. Yet the evidence confirms it: those who follow a diet rich in EVO oil lose weight more easily and maintain it over time compared to those who follow low-fat diets. In this guide, you'll find the mechanisms, evidence, and practical tips — without unrealistic promises.

The paradox of fat that helps you lose weight

For decades, nutrition has promoted low-fat diets as the main strategy for weight loss. The problem is that clinical trials have not confirmed this hypothesis: low-fat diets produce short-term weight loss, but dropout rates are high and long-term maintenance is poor.

Mediterranean diets — rich in EVO oil, nuts, and fatty fish — produce comparable or superior long-term results, with better adherence and better metabolic profiles. The reason is both physiological (quality fats are satiating) and psychological (a diet with good food is easier to maintain than a restrictive diet).

EVO oil and satiety: the mechanisms

Fats are the macronutrients with the highest satiating power per calorie — not despite their calories, but thanks to the hormonal mechanisms they activate:

• Stimulation of cholecystokinin (CCK): Fats stimulate the release of CCK in the small intestine, a hormone that slows gastric emptying and signals satiety to the brain. The effect lasts for hours — longer than refined carbohydrates.
• Reduction of ghrelin: Ghrelin is the hunger hormone. Fats, especially monounsaturated ones, suppress ghrelin more effectively than carbohydrates — reducing the feeling of hunger in the hours after a meal.
• Effect on GLP-1: EVO oil stimulates the secretion of GLP-1 (glucagon-like peptide 1), an intestinal hormone that increases satiety and improves insulin sensitivity. GLP-1 is the target of the most widely used drugs today for the management of obesity and type 2 diabetes — EVO oil naturally stimulates its secretion.

EVO oil and metabolism: beyond calories

Simple calorie counting doesn't capture the whole story. 120 kcal of EVO oil don't have the same metabolic effect as 120 kcal of sugar or saturated fat. Some relevant differences:

• Preferential oxidation: Oleic acid is preferentially oxidized as an energy source, with less tendency to accumulate compared to long-chain saturated fatty acids.
• Effect on the microbiota: EVO oil promotes a gut microbiota associated with less body fat accumulation and better energy regulation.
• Reduction of adipose inflammation: Inflamed adipose tissue releases cytokines that resist weight loss. EVO oil polyphenols reduce this inflammation — creating metabolic conditions more favorable for weight loss.
• Reduced fat absorption: EVO oil polyphenols partially inhibit pancreatic lipase — the enzyme that breaks down fats in the intestine to allow their absorption. The effect is modest but contributes to reducing the calories actually absorbed.

What studies say about weight

• PREDIMED Study: After almost 5 years, the group with a Mediterranean diet + EVO oil did not gain weight compared to the control group — despite consuming more calories from fat. The low-fat group, on the other hand, showed a slight average weight gain.
• Mediterranean diet vs low-fat (meta-analysis 2016): Across 16 randomized studies, the Mediterranean diet produced comparable or superior weight loss to low-fat diets, with better long-term adherence.
• DIRECT Study (2008): 322 obese participants assigned to three different diets for 2 years — low-fat, low-carb, Mediterranean. The Mediterranean diet produced the most sustained weight loss in the long term (-4.4 kg vs -2.9 kg for the low-fat group).

How to use EVO oil in a calorie-restricted diet

EVO oil is not a magic weight loss tool — it's a caloric fat that needs to be included in an overall eating plan. Practical tips:

Don't eliminate it, balance it

The common mistake in a weight loss diet is to eliminate all fats to reduce calories. This is counterproductive: it reduces satiety, increases carbohydrate cravings, and makes the diet unsustainable. Maintaining 2-3 tablespoons of EVO oil per day, while reducing other fats (butter, fatty cheeses, fatty meats), produces better long-term results.

Use it at the beginning of a meal

Starting a meal with vegetables dressed with EVO oil anticipates the stimulation of satiety — you eat less during the rest of the meal without feeling deprived. This is the principle of the "fat preload" used in some weight loss protocols.

Replace lower quality fats

Every tablespoon of butter replaced by EVO oil maintains the same calories (about 100 kcal) but changes the metabolic profile favorably — less saturated fat, more monounsaturated fat, added polyphenols. The substitution does not reduce calories, but improves the quality of the overall calorie deficit.

Pair it with low glycemic index carbohydrates

EVO oil paired with whole grains, legumes, and vegetables creates meals with prolonged satiety and a low glycemic peak — ideal conditions for a sustainable calorie deficit without chronic hunger.

Which oil for those who want to lose weight

For those on a calorie-restricted diet, the quality of the oil is particularly relevant for its polyphenols — which have direct effects on adipose inflammation and the microbiota. For daily use, Pertutto Cutrera offers a good polyphenol profile at an accessible price — suitable for those who use 2-3 tablespoons a day regularly. For those who want to maximize bioactive compounds, Primo BIO is the choice with the highest profile.

To understand how to incorporate EVO oil into an overall dietary model: Mediterranean diet and extra virgin olive oil.

Frequently Asked Questions

Does olive oil make you fat?

Like any fat, if consumed in excess of total caloric needs, it contributes to weight gain. But when included in a balanced diet as the main fat, replacing other fats, it does not cause weight gain — and evidence shows that those who use it regularly tend to have a lower BMI compared to those who avoid it.

How many calories are in a tablespoon of olive oil?

A tablespoon (15 ml) of EVO oil contains about 120-130 kcal. It is not a "light" food — but the quality of the calories (monounsaturated fats + polyphenols) and its effect on satiety make it more favorable for weight control than many other condiments.

Is raw or cooked olive oil better for weight loss?

Both contribute. Raw, it better preserves thermolabile polyphenols. When cooked, it still retains oleic acid and vitamin E. There is no absolute rule — the important thing is to use it as the main fat in the diet, both raw and cooked, in the context of a balanced eating plan.

Olive oil or coconut oil for weight loss?

Extra virgin olive oil. Coconut oil (rich in medium-chain saturated fatty acids) has been promoted as a "fat burner" — a claim not supported by solid evidence. Meta-analyses compare the two: EVO oil has a vastly superior body of evidence for cardiovascular health, glucose metabolism, and long-term weight management.