Acids · Le

Lemon

pH 2.2 · 5% citric acid

Per 100 g

29 kcal Energy

1.1 g Protein

9.3 g Carbs

0.3 g Fat

2.8 g Fibre

Gluten-free

Let’s cook with it → Invent something with it

What it is for

They set the balance. Acid cuts fat, reins in sweetness, denatures protein and triggers leaveners. When a dish tastes like something is missing, it is usually acid rather than salt.

Where it catches you out

Heat drives the aroma out of acid. Squeeze the lemon at the table, not into the pot, and add vinegar at the end.

The knack

Roll it on the counter before juicing: the cell walls break and the same lemon gives noticeably more juice.

Storage and health

How to keep it, and who it suits.

Keeping it

A week at room temperature, or 3-4 weeks bagged in the fridge; the juice keeps 2-3 days refrigerated and four months frozen.

Gluten-free

Lemon is naturally gluten-free.

Glycaemic index

This ingredient carries no meaningful carbohydrate, so it has no glycaemic index. On its own it will not move blood sugar; what you eat alongside it decides that.

What it works with

Pairings, and the reason for each

"They go well together" is not an explanation. Every pairing below has a chemical or structural mechanism under it.

Fish →

Citric acid protonates trimethylamine into the trimethylammonium ion, an ionic salt with far lower vapour pressure. The fishy molecule is still there; it simply can no longer reach your nose.

Lentil →

Ascorbate reduces Fe³⁺ to the more soluble Fe²⁺ and forms a soluble chelate that shields the iron from phytate and polyphenols, raising non-heme iron absorption roughly two- to sixfold.

Tahini →

Acid plus water breaks the continuous sesame-oil phase and inverts it into an oil-in-water emulsion. That inversion is why tahini seizes and then suddenly turns pale and pourable.

Also works with

Olive oil

Chicken

Chickpea

Egg

Spinach

What it fights with

Milk

In a hot sauce it drives the pH toward casein’s isoelectric point of 4.6 and collapses the micelles into curds.

Spinach

Held after dressing, acid displaces magnesium from chlorophyll and turns greens olive-drab.

What goes on top

Lemon is itself the finish: the limonene in the zest is volatile, so it is squeezed at the table

Key compounds

Sitrik asit: 5–6% of the juice; non-volatile, so it stays after cooking.
Limonen: In the peel; destroyed by simmering, so zest goes in at the end.

Nutritionally

The vitamin C in a squeeze of lemon is nutritionally minor; its kitchen importance is enhancing iron absorption at the same meal, and 25–50 mg is enough to matter.

Where it turns up

What is made with it

3 dishes in the database use it.

Soups 1

Wedding soup

A ceremonial soup cooked in meat broth whose identity is its terbiye: strained yoghurt, egg yolk, flour and lemon juice beaten separately, tempered, and stirred in. Finished with butter and chilli.

İç Anadolu, Marmara

Desserts 2

Kalburabastı

Walnut-filled dough ovals are pressed against a sieve to emboss ridges, baked and soaked in syrup. The name comes straight from that gesture.

Yoghurt syrup cake

A pale tray bake cut into squares or diamonds and drenched in cold syrup. It looks like revani but is made with flour rather than semolina, and the yoghurt is genuinely in the batter.

Kayseri, Trakya

Quick ideas