Health Benefits of Greek Salad: The Evidence (From a Registered Nutritionist)

Greek salad must be half decent if it’s often considered one of Greece’s national dishes, right? Where I’m from, ours is chips, cheese and gravy, so perhaps that’s not the most scientific test.

But yes, Greek salad can be a nutritious choice, with vegetables, unsaturated fats and some protein and calcium from feta. The vegetables, feta and dressing all bring something different to the bowl. [1][7]

Still, catching me on a Greek beach with a salad and a cocktail sounds fairly appealing. For now, let’s look at what the ingredients actually bring to the table.

Health Benefits of Greek Salad

The useful thing about Greek salad is the mix of ingredients, rather than one food doing something miraculous. Let’s start with the vegetables, then look at the dressing, feta and the whole meal.

1. Cucumbers

These are basically big, green sticks of water. At roughly 96% water, cucumber adds plenty of freshness and crunch without many calories. It contributes some fibre too, although it isn’t the ingredient I’d rely on for a big fibre boost. [1]

Keep the skin on if you enjoy it, chop generously and let cucumber do what it does best: make the salad refreshing.

2. Tomatoes

Tomatoes bring vitamin C and lycopene, a natural plant pigment that gives them their red colour. Lycopene has antioxidant properties, meaning it can help neutralise reactive molecules that can damage cells. [1][8]

Here’s the interesting bit: your body doesn’t absorb all the lycopene in a tomato. Processing can make more of it available, so raw isn’t automatically better. [2]

Researchers compared fresh tomatoes with tomato paste, making sure both meals contained an equal amount of lycopene and the same quantity of oil. This helped them test whether the form of the tomato affected absorption.

The peak lycopene level measured in the blood after eating the paste was around 2.5 times as high. That suggests the lycopene in the paste was easier to absorb. [2]

That’s part of the thinking behind my Greek salad recipe with roasted tomatoes. Research on heated tomatoes suggests roasting may also make more of their lycopene available for your body to absorb. That’s a plausible benefit from the cooking research, although we can’t put an exact figure on it for this recipe. [2][8]

So you get sweeter, softer tomatoes, with a potential nutrition bonus too. I’ll happily take that.

3. Green Pepper

Typically, sliced green peppers are used in a Greek salad, but I’m sure the Greeks will let us off for choosing another colour. Don’t quote me on that.

Green pepper is a useful source of vitamin C. For a concrete example, 50 g provides around 60 mg using UK food-composition figures. That’s a handy contribution from an ingredient you can simply slice and chuck in. [1]

4. Olives and Olive Oil

Olives, particularly Kalamata olives, are a familiar addition to Greek salad. The dressing is usually simple: extra virgin olive oil, red wine vinegar and dried oregano. Some recipes add lemon juice too, though my preference is to let the oregano and vinegar do the work.

Olive oil contains mainly monounsaturated fat, a type of unsaturated fat. So the fact that a salad contains fat doesn’t automatically make it an unhealthy choice. [1][7]

There’s interesting heart-health research here too. A 2014 analysis followed 7,216 older adults at high cardiovascular risk for a median of 4.8 years. The highest olive-oil intake was associated with a 48% lower relative risk of cardiovascular death compared with the lowest intake. [3]

My practical take? Enjoy the dressing, but measure it if you’re keeping an eye on calories. An extra 10 g of olive oil adds around 90 kcal, and those enthusiastic free-pours can be surprisingly generous. [1]

5. Red Onions

Red onions bring more than crunch and a slightly questionable effect on your breath. Their red-purple colour comes from plant pigments called anthocyanins, which researchers have identified in the edible onion itself. [4]

These compounds have antioxidant properties. A 2022 review focused on onion anthocyanins and explored their potential health effects, including how they interact with processes involved in inflammation. That gives the colour a bit more nutritional interest than simply making the bowl look pretty. [5]

For the salad itself, slice the onion thinly so it adds a little bite without taking over every mouthful.

6. Feta Cheese

And then there’s feta. I’m not going to pretend the cheese isn’t part of the appeal.

A 40 g portion provides roughly 6 g of protein and 144 mg of calcium, based on UK composition figures. It also contributes about 1 g of salt, before the olives or any extra seasoning. [1]

The NHS recommends adults have no more than 6 g of salt a day, so feta is worth keeping in mind alongside other salty foods. Enjoy it, but taste the salad before reaching for the salt shaker. Between the feta and olives, it may already have all the seasoning it needs. [6]

Bringing The Dish Together

How many calories are in Greek salad?

So what does that look like in an actual bowl? Here’s one illustrative serving, rather than a nutrition figure for an unspecified “Greek salad”.

Calculated from CoFID 2021 ingredient values, not laboratory testing. Weights are edible portions; generic raw onion and drained green-olive entries are used. No bread, extra salt or additional dressing is included.

This is not the nutrition estimate for my separate roasted-tomato recipe.

If weight loss is your aim, the portion of oil and feta can make a meaningful difference to calories. You don’t need to remove them, but “salad” on the menu doesn’t tell you the calorie content. [1]

Can you eat Greek salad every day?

Yes, Greek salad can fit into a balanced daily diet. If it’s a lunch you genuinely look forward to, there’s no need to retire it by Wednesday.

Keep some variety in the rest of your meals, and be mindful of the salt from feta and olives. The overall mix of foods you eat matters more than how often the same salad appears. [7][6]

For more help making sense of nutrition claims, sign up to receive my free guide, What Actually Moves the Needle.

References

1. Public Health England. McCance and Widdowson’s Composition of Foods Integrated Dataset (CoFID), 2021. Nutrient data and serving calculations, checked 25 September 2026. Food codes: 13-517 tomatoes; 13-523 cucumber; 13-318 green pepper; 13-499 onion; 12-525 feta; 14-340 drained green olives; 17-038 olive oil. Salt calculated as sodium × 2.5, converting milligrams to grams.
2. Gärtner C, Stahl W, Sies H. Lycopene is more bioavailable from tomato paste than from fresh tomatoes. American Journal of Clinical Nutrition. 1997;66(1):116–122. Human feeding study.
3. Guasch-Ferré M, et al. Olive oil intake and risk of cardiovascular disease and mortality in the PREDIMED Study. BMC Medicine. 2014;12:78. Observational analysis within the PREDIMED population.
4. Flavonoid and carbohydrate contents in Tropea red onions: effects of homelike peeling and storage. 2002. Food-composition study, not a trial of health outcomes.
5. Samota MK, et al. Onion anthocyanins: Extraction, stability, bioavailability, dietary effect, and health implications. Frontiers in Nutrition. 2022;9:917617. Review of onion anthocyanins and their properties.
6. NHS. Salt in your diet. Adult daily salt guidance, checked 25 September 2026.
7. NHS. Eating a balanced diet. Food-group and practical meal guidance, checked 25 September 2026.
8. Dewanto V, Wu X, Adom KK, Liu RH. Thermal processing enhances the nutritional value of tomatoes by increasing total antioxidant activity. Journal of Agricultural and Food Chemistry. 2002;50(10):3010–3014. Laboratory food study: heating increased measured bioaccessible lycopene; it did not measure absorption in people eating this recipe.