Salmon curing and salt content: how to choose gravlax and smoked products if you want less salt?

Salting and the salt content of rainbow trout can be practically managed with three choices: choose fresh fish, ask for the salt percentage of ready-made gravlax or smoked products, and portion it so that the salt doesn't go overboard. Knowing where the salt comes from and what to look for on the packaging will allow you to serve rainbow trout that tastes good without being "overpowering" due to its saltiness.

Salting of salmon and salt content, where does the salt actually come from?

Salt is not added to rainbow trout "by itself" but is introduced. In gravad trout, salt (often also sugar) is absorbed by the fish during curing, and in cold-smoked fish, curing is done before smoking. In hot-smoked fish, the fish is cured, cooked, and smoked, which changes the texture and mouthfeel, and the saltiness may be emphasised differently than in gravad fish.

Salt content is affected by salting time, amount of salt, piece size, and whether the product is intended to be eaten as-is or with pasta or salad, for example. This is why two "cold smokes" can have a noticeable difference, even if the name sounds the same. If you want to control the overall dish, first check the salt content of the product and then deliberately make the side dishes and sauces milder.

When you know the salt content of the product and portion it correctly, you get the taste of gravlax and smoked trout without unnecessary salt load.

How to choose cured and smoked products if you want less salt?

When you're looking for less salt, start with the product group. Often the easiest way to calculate salt load is to choose fresh rainbow trout and season it yourself, as then you decide the amount of salt. Ready-made cured and smoked products have the most variation, so ask for the salt content (g/100 g) or salt percentage before ordering, especially in commercial kitchens.

A quick rule of thumb helps with purchasing decisions: if a product contains 2.5 g of salt per 100 g, an 80 g serving provides 2.0 g of salt. If it contains 1.8 g of salt per 100 g, the same serving provides 1.44 g. The difference is 0.56 g per serving, and for 100 servings, that's 56 g less salt. This makes a difference if the menu includes other salty components during the same day.

Also ask if a less salty batch is available or if the slice thickness is suitable for your intended use. A thinner slice is often perceived as saltier because the salt hits the tongue more quickly. A thicker slice or dicing for a salad distributes the saltiness more evenly throughout the dish. If you would like more tips on gravad lax preparation, see also Gravad salmon salting times and flavouring options.

Balance the portion so that the salt content decreases without compromising the flavour.

When the main ingredient is raw or smoked rainbow trout, small choices in the accompaniments are crucial. Keep other components decidedly low in salt: potato, barley, rice, fresh vegetables, citrus, and herbs will enhance the flavour without extra salt. If you use a sauce, make it acid-based (lemon, yogurt, sour cream) and flavour with dill, pepper, and mustard, but keep added salt to a minimum.

To give a practical example for a catering service: for a brunch for 60 people, cold-smoked rainbow trout is served at 50g/person and hot-smoked at 60g/person. If the cold-smoked salmon contains 2.2g of salt/100g and the hot-smoked contains 2.6g/100g, the salt from the fish alone accumulates to approximately 0.50 x 2.2 x 60 + 0.60 x 2.6 x 60 = 79.2g. If you switch one of the components to a milder one (e.g., 1.8g/100g) or reduce the portion size by 10g, the overall dish becomes lighter immediately, and the flavour remains when the side dishes are fresh and filling.

In a large catering kitchen, it's also worth considering serving temperature and the overall sodium content of the menu, as warm food "softens" saltiness differently to cold food. Also check the work steps and waste minimisation, as overly large portion sizes unnecessarily increase salt content. See practical portioning and waste reduction tips: Fish handling in a professional kitchen.

Risks and limitations: what to watch out for when seeking less salt?

Salt is not just a flavour, but also affects shelf life and texture. If you request a clearly milder salting for gravad lax or cold-smoked fish, ensure the delivery schedule, storage, and use-by date at the same time. The cold chain, in particular, must remain unbroken, and opened packaging should be used quickly. You can find tips for receiving and identifying quality here: fish freshness on receipt.

Another risk is "hidden salt" in side dishes: bread, cheeses, pickled cucumbers, capers, and ready-made sauces can raise the salt content higher than the fish itself. If your goal is truly a lower-salt overall meal, make one decision at a time and measure: how much fish per portion, what is the salt content of the product, and what else is on the plate.

If diners have special diets or allergies, also ensure cross-contamination control and product information. If necessary, check the instructions: allergens and prevention of cross-contamination.