Cucumber · raw

Raw cucumber provides about 12 kcal per 100 g, with 0.6 g of protein, 2 g of carbs, 0.1 g of fat and 0.7 g of fiber. The numbers are easy to explain: it is more than 95% water. A generous 150 g portion therefore adds barely 18 kcal, less than a teaspoon of honey. It is one of the lowest-calorie foods on your shopping list, and one of the easiest to add to a meal without calculating anything.

Botanically it is a fruit from the gourd family, like zucchini, watermelon and squash, but in the kitchen it is filed with vegetables. Its mild flavor and crunchy texture make it a fresh counterpoint to spicy, rich or salty dishes. The values above are for plain cucumber, with no sauce or seasoning: the dressing or cream you add completely changes the total of the bowl.

Cucumber contains a little vitamin K, potassium, magnesium and vitamin C, but in modest amounts since water dominates. It does not replace spinach or bell peppers to cover your vitamin needs. Its skin holds most of the fiber and a good share of the vitamin K, so peeling it removes part of these contributions. If the skin is thin and the vegetable well washed, keep it: you gain fiber, color and crunch.

It also supplies water and a small amount of electrolytes, which makes it pleasant in summer or after a gym session. It does not replace drinking and does not make up for heavy sweat losses, but it contributes to your overall hydration. Do not expect any spectacular effect: it is a simple vegetable, useful for its volume and freshness, to include in a varied diet rather than to present as a remedy.

In a calorie deficit, hunger often comes from a lack of volume on the plate. Cucumber provides plenty of it for almost nothing: 300 g of slices cost only 36 kcal, yet fill a large bowl and require chewing, which slows the meal down. It works well as a starter before the main course, as a side to chicken breast or fish, or as a crunchy snack instead of chips when you feel like chewing.

Be careful, though: few calories does not mean lasting fullness. With 0.6 g of protein and 0.7 g of fiber per 100 g, it cannot hold you on its own. Pair it with a protein source (tuna, egg, fromage blanc, skyr) and with denser carbs or fiber to last until the next meal. Treat it as a volume tool that completes the plate, never as a meal by itself, or you risk cracking in the evening.

When bulking, cucumber is not the hero: its 12 kcal per 100 g do not help you reach your surplus, and it can even fill you up too fast if you eat large amounts before the main dish. Its role lies elsewhere: bringing freshness and variety to meals rich in rice, pasta, meat and sauces, and making big plates more pleasant when you have to finish them even without much appetite.

A good habit is to place it next to dense foods rather than before them. A tzatziki made with Greek yogurt, olive oil and cucumber becomes a side that is both fresh and calorie-rich. You enjoy the crunch without sacrificing your surplus, and you vary textures so you do not get tired of eating a lot. Eat it at the end of the meal or mixed into the dish, not in large amounts first.

Choose a cucumber that is firm along its whole length, with smooth, shiny, evenly green skin and no soft or yellowing patches. The ends should be firm. A cucumber that feels heavy for its size is usually juicier. Avoid those that give under your thumb or whose tip is softening: they are already deteriorating. Loose cucumbers are easier to inspect than those wrapped in film, even though the film limits water loss.

At home, a whole cucumber keeps for about a week in the fridge, preferably in the vegetable drawer. It dislikes intense cold and can soften or develop spots if the temperature is too low. Once cut, wrap the remaining part and eat it within two to three days. Do not store it near apples or ripe tomatoes, which release ethylene and speed up yellowing. Wash it only right before eating.

Wash it under water, then decide about the skin: if thin, eat it; if thick or waxed, it can be bitter and it is better to peel it in strips. The seeds are edible, but in large cucumbers they hold a lot of water and make salads watery; remove them with a small spoon if needed. Cut into thin slices, half-moons or cubes, and season at the last moment, because salt draws out water and dilutes the salad.

For a firmer salad or a thicker tzatziki, salt the slices with a pinch of salt for 15 to 20 minutes, rinse, then press them in a clean towel. Common mistakes: salting too early, forgetting to dry, drowning the cucumber in an oil dressing that multiplies the calories, or believing that sweetened jarred versions are a light choice. Also check the amount of cream in sauces.

Cucumber is used raw in cubes, slices or sticks for dipping in hummus. You find it in the tuna, tomato and cucumber salad, simple and rich in protein, or in the quinoa, feta and cucumber salad for a complete dish. It also adds crunch to the salmon and quinoa bowl, the egg and veggie wrap and the falafel and hummus bowl, where its freshness balances the richer flavors.

The vegetable couscous tabbouleh also benefits from its freshness. Other ideas: mint-infused water, gazpacho, sandwiches in place of lettuce, spring rolls, or slices on salted fromage blanc with herbs. Prepare a little in advance so you always have a vegetable ready to crunch. Since it contains very little energy, weigh it if you like, but do not worry about it too much: what matters most is what you add around it.