Drinking Olive Oil: What the Research Actually Shows

Drinking olive oil—usually a small amount, a tablespoon or less—does deliver some compounds your body can use, but not in the way marketing often suggests. Extra virgin olive oil contains polyphenols, a type of antioxidant, along with monounsaturated fat and vitamin E. When you swallow it, your digestive system breaks it down like any other fat. The polyphenols may reach your bloodstream, but the amount that survives digestion is smaller than what you'd get from eating olives or olive-oil-dressed salads, where the fiber and other food components help preserve them.

The studies people cite—usually Mediterranean diet research—don't isolate drinking oil as the active ingredient. They measure people who eat olive oil as part of meals, over years, alongside vegetables, fish, and whole grains. A tablespoon of oil on an empty stomach is a different scenario entirely, and the research on that specific practice is thin. What exists suggests modest effects on inflammation markers and cholesterol in some people, but not the dramatic shifts that wellness sites promise.

Key Takeaways

  • Drinking olive oil delivers polyphenols and fat-soluble vitamins, but digestion breaks down some of the beneficial compounds before your body absorbs them.
  • The strongest evidence for olive oil's health effects comes from eating it with food over months or years, not from drinking it straight.
  • A tablespoon of extra virgin olive oil contains roughly 120 calories and 14 grams of fat, so daily drinking adds up quickly if you're watching intake.
  • Digestive side effects—nausea, loose stools, or stomach discomfort—are common when people drink oil on an empty stomach, especially if they're not used to high fat intake.
  • If you want the compounds olive oil offers, eating it with meals (salads, bread, cooked vegetables) is more practical and better studied than drinking it alone.

How Much Olive Oil People Actually Drink

Most people who drink olive oil consume between half a tablespoon and one full tablespoon, usually in the morning on an empty stomach or mixed into warm water or lemon juice. Some protocols suggest doing this daily; others recommend it a few times a week. The amount matters because olive oil is calorie-dense—one tablespoon has about 120 calories and 14 grams of fat—so regular drinking can shift your daily intake significantly if you're not accounting for it elsewhere.

The timing and preparation also vary. Some people drink it straight; others dilute it with water, lemon juice, or apple cider vinegar. A few add it to coffee or tea. The dilution doesn't change the nutritional content, but it may reduce nausea or stomach upset, which is why people often try it that way first. If you're considering this, starting with a smaller amount—half a teaspoon—and taking it with food is gentler than jumping to a full tablespoon on an empty stomach.

What Olive Oil May Do (and What It Probably Won't)

Olive oil contains compounds that have shown anti-inflammatory effects in lab and animal studies. Oleocanthal, one polyphenol in extra virgin oil, has been studied for potential effects on joint inflammation and cognitive function. However, the doses used in those studies are often higher than what you'd get from a tablespoon, and animal results don't always translate to humans. The human trials that exist are usually small, short-term, or part of broader diet studies where olive oil is one of many variables.

Claims that drinking olive oil will "detox" your liver, "cleanse" your digestive system, or "boost" immunity lack solid evidence. Your liver and kidneys already handle detoxification; adding oil doesn't speed that up. Digestive claims often rest on the idea that oil lubricates the system, but that's not how digestion works—your body produces its own lubricating mucus. If you have a genuine deficiency in fat-soluble vitamins (A, D, E, K), eating a balanced diet with olive oil in it will address that more reliably than drinking oil straight.

Digestive Side Effects and Who Should Avoid It

Nausea, stomach cramping, and loose stools are the most common reactions to drinking olive oil, especially on an empty stomach or if your body isn't used to high fat intake. These effects usually fade after a few days as your system adjusts, but they can be intense enough that people stop the practice. If you have irritable bowel syndrome, inflammatory bowel disease, or a history of gallstones, drinking oil is more likely to trigger symptoms and is worth discussing with your doctor first.

People taking blood thinners should know that olive oil has mild anticoagulant properties, so very large amounts could theoretically interact with medications like warfarin. A tablespoon is unlikely to cause problems, but if you're on blood thinners, mention it to your prescriber. Similarly, if you're managing weight or blood sugar, the 120 calories per tablespoon adds up—it's not "free" just because it's oil.

Extra Virgin vs. Regular Olive Oil for Drinking

Extra virgin olive oil is the better choice if you're going to drink it, because it retains more polyphenols and hasn't been refined with heat or chemicals. Regular or "light" olive oil is processed to remove flavor and some compounds, so you lose the potential benefit. Look for bottles labeled "extra virgin" and stored in dark glass, since polyphenols degrade in light and heat.

Price varies widely, and expensive doesn't always mean better. A mid-range extra virgin oil from a reputable producer will have the compounds you're after. Once you open a bottle, use it within a few months and store it in a cool, dark place—a kitchen cabinet rather than above the stove. Rancid oil tastes off and has lost its beneficial compounds, so if it smells musty or flat, replace it.

A More Practical Way to Get Olive Oil's Benefits

If you want the compounds olive oil offers, eating it with food is more effective and easier on your stomach. Drizzle it over salads, vegetables, or soup after cooking. Use it to dip bread. Cook with it at moderate temperatures (it's not ideal for high-heat frying, but fine for sautéing). Pair it with foods that contain vitamin C or other antioxidants—tomatoes, leafy greens, citrus—because those compounds work together to reduce inflammation.

This approach delivers polyphenols in a form your body can actually use, avoids the digestive upset of drinking oil straight, and fits into normal eating patterns. The Mediterranean diet studies that show real health benefits measure people eating olive oil this way, over years, as part of a pattern that includes whole grains, fish, legumes, and vegetables. That's the evidence base, not the tablespoon-in-the-morning trend.

Frequently Asked Questions

Will drinking olive oil help with joint pain or arthritis?

Olive oil contains compounds that reduce inflammation in lab studies, and some small human trials suggest modest effects on joint pain. However, the evidence is stronger for eating olive oil as part of meals over time than for drinking it straight. If you have arthritis, talk to your doctor before adding any supplement routine; olive oil isn't a replacement for proven treatments.

Can I drink olive oil to lower cholesterol?

Olive oil may help improve cholesterol ratios when eaten regularly as part of a diet rich in vegetables and whole grains. Drinking a tablespoon alone won't move the needle. If cholesterol is a concern, focus on overall diet pattern—more fiber, less processed food, regular olive oil use in cooking and salads—rather than a single practice.

Is it safe to drink olive oil every day?

A tablespoon daily is safe for most people, but it adds 120 calories and 14 grams of fat to your intake, so account for it in your overall diet. If you experience nausea, cramping, or loose stools, your body may be signaling that daily drinking isn't working for you. Occasional use or eating olive oil with meals is a gentler approach.

What's the difference between drinking olive oil and taking an olive oil supplement?

Supplements extract and concentrate specific compounds from olive oil, usually polyphenols. They're more expensive and not better studied than whole olive oil. Drinking olive oil gives you the full compound profile, though some polyphenols are lost to digestion. Neither is proven superior to eating olive oil with food.