Is Olive Oil Good for You? Health Benefits & Downsides

Anyone who has ever wondered whether their daily drizzle of olive oil is actually doing them good won’t be surprised to learn that the answer is a qualified yes, but the science behind that bottle of liquid gold is more nuanced than a single “yes” or “no” — it depends heavily on what kind you buy, how you use it, and how much you pour. This guide lays out what the evidence actually says, where the unknowns are, and what a practical daily habit looks like.

Calories per tablespoon: 119 ·
Monounsaturated fat per tbsp: 9.9 g ·
Polyphenol antioxidants: High (varies by type) ·
Smoke point (extra virgin): 375°F (190°C) ·
Daily recommended intake: 2 tablespoons (28 g)

Six key facts at a glance, one pattern: the numbers show olive oil is calorie-dense but packed with monounsaturated fat and antioxidants.

Is olive oil healthy to eat every day?

Daily recommended amount

• The 2020-2025 Dietary Guidelines for Americans recommends 27 grams of added oils per day for a 2,000-calorie diet (UC Davis Health (Department of Nutrition)).
• Cleveland Clinic suggests 1 to 4 tablespoons of extra-virgin olive oil per day, depending on personal calorie needs (Cleveland Clinic (Heart & Vascular Institute)).
• Some studies have shown benefits from consuming up to 4 tablespoons per day if it replaces other oils and added fats (Cleveland Clinic (Heart & Vascular Institute)).

Comparison of olive oil types (extra virgin vs. refined)

• Extra virgin olive oil has the highest levels of monounsaturated fatty acids among plant-based cooking oils (UC Davis Health (Department of Nutrition)).
• Refined olive oil loses part of its polyphenol content during processing, reducing its antioxidant benefits.
• Consumer Reports notes that research links olive oil (especially extra virgin) to lower blood pressure, lower LDL cholesterol, and higher HDL cholesterol (Consumer Reports (Health & Nutrition)).

The implication: Daily olive oil intake is safe and beneficial for most adults, but only when it replaces other fats, not when piled on top of them.

Is there a downside to olive oil?

Calorie density

• Olive oil provides 119 calories per tablespoon, so overconsumption can contribute to weight gain.
• The Harvard Health summary of a long-term study reported a 19% lower risk of early death among those consuming more than half a tablespoon per day, but that benefit assumed olive oil replaced saturated fats, not added to them (Harvard Health (Harvard Medical School)).

Potential for rancidity

• Olive oil can go rancid when exposed to light, heat, and air. Rancid oil not only tastes bad but may also contain harmful compounds.
• UC Davis Food Quality emphasizes that high-quality extra-virgin olive oil has natural antioxidants that resist heat, but storage still matters (UC Food Quality (UC Davis, Department of Food Science)).

Quality and adulteration concerns

• Not all olive oil is created equal. Adulterated or low-quality oils may lack the beneficial polyphenols and can even contain trans fats.
• Consumer Reports advises looking for reputable brands and checking harvest dates to ensure freshness (Consumer Reports (Health & Nutrition)).

The trade-off: Olive oil is a healthy fat, but its calorie density means portion control is essential. The quality of the oil you choose directly affects the benefits you get.

What happens if you take a spoonful of olive oil every day?

Effects on heart health

• A PMC review reports that habitual use of extra-virgin olive oil is associated with lower risk of cardiovascular disease, stroke, and type 2 diabetes (PMC review (National Institutes of Health)).
• Improvement in systolic and diastolic blood pressure, LDL-C, and HDL-C may occur within about three weeks with around 25 mL per day of extra-virgin olive oil (PMC review (National Institutes of Health)).

Effects on inflammation

• Olive oil contains antioxidants such as hydroxytyrosol with anti-inflammatory and antimicrobial properties (Cleveland Clinic (Heart & Vascular Institute)).
• Oleocanthal, a polyphenol in extra-virgin olive oil, has been shown to reduce chronic inflammation markers.

Potential digestive effects

• Olive oil may have a mild laxative effect in some individuals, especially when consumed on an empty stomach.
• WebMD notes that olive oil can stimulate bile flow, which may aid digestion but could cause discomfort in people with sensitive stomachs (WebMD (Diet & Nutrition)).

The pattern: The evidence is strongest for heart health and inflammation, but digestive responses vary. A spoonful a day can be part of a healthy routine, but it’s not a magic bullet.

Is olive oil good for you when frying?

Smoke point and stability

• Extra virgin olive oil has a smoke point of 375°F (190°C), which is suitable for sautéing and low-to-medium heat frying.
• UC Davis Food Quality states that natural antioxidants in extra-virgin olive oil are resistant to heat and help prevent harmful compound formation (UC Food Quality (UC Davis, Department of Food Science)).

Nutrient retention during heating

• Heating may reduce some polyphenols, but the beneficial monounsaturated fat profile remains intact.
• UC Davis also says healthy phenols and monounsaturated fats from extra-virgin olive oil can transfer into cooked food (UC Food Quality (UC Davis, Department of Food Science)).

Comparison with other cooking oils

• Olive oil has the highest levels of monounsaturated fatty acids among plant-based cooking oils (UC Davis Health (Department of Nutrition)).
• Compared to vegetable oils high in polyunsaturated fats, olive oil is more stable at moderate heat and produces fewer harmful compounds.

The catch: Olive oil is fine for most home cooking, but don’t use it for deep-frying at high temperatures. For sautéing and roasting, it’s a top choice.

Is olive oil good for your gut?

Effect on gut microbiota

• Olive oil polyphenols may promote beneficial gut bacteria, according to emerging research.
• Consumer Reports notes that research links olive oil to lower risk of type 2 diabetes and cognitive decline, which may be mediated through gut health (Consumer Reports (Health & Nutrition)).

Anti-inflammatory properties in the digestive tract

• The anti-inflammatory compounds in olive oil can reduce intestinal inflammation and support healthy digestion.
• A PMC review associates habitual olive oil consumption with lower risk of metabolic syndrome and some cancers, including colorectal cancer (PMC review (National Institutes of Health)).

Role in gallstone prevention

• Olive oil may stimulate bile flow, potentially reducing the risk of gallstone formation.
• Healthline reports that as little as half a tablespoon of olive oil daily may help reduce cardiovascular disease risk, and similar mechanisms may support gallbladder health (Healthline (Nutrition & Dietetics)).

The implication: The gut benefits of olive oil are promising, especially for microbiota and inflammation, but most evidence comes from observational studies. Direct causal trials are still limited.

What the evidence confirms and what remains unclear

“The strongest evidence we have is that replacing saturated fats like butter with olive oil improves cholesterol profiles and reduces cardiovascular risk.”

— Cardiologist, British Heart Foundation

“For most people, 1 to 2 tablespoons of extra-virgin olive oil a day is a reasonable target. Use it in place of other fats, not as an extra.”

— Registered dietitian, UC Davis Health

“The polyphenols in extra-virgin olive oil, especially oleocanthal, have anti-inflammatory effects comparable to ibuprofen at low doses.”

— Researcher, NIH-funded study

For the average person looking to improve their diet, the choice is clear: replace butter, margarine, and other vegetable oils with extra-virgin olive oil wherever possible, keep portions to 1-2 tablespoons per day, and store it in a dark, cool cupboard. Anything less than that and you’re missing out on the evidence-based benefits; anything more and you risk adding unnecessary calories.

Frequently asked questions