TREHA® trehalose is best known for baking, confectionery and frozen desserts, but some of its most useful applications are actually savoury.

Used in small quantities, TREHA® can help foods retain moisture, texture, colour and flavour without making them noticeably sweet.

That makes it useful across:

• meat and poultry
• fish and seafood
• sushi
• rice
• vegetables and salads
• noodles and dumplings
• eggs
• sauces
• prepared meals and takeaway food

Nagase Viita, the manufacturer of TREHA®, publishes specific guidance for all of these applications, generally using only 1–3% TREHA® depending on the food.[1]

TREHA® savoury ratios at a glance

These are useful starting points rather than limits. In most savoury foods, TREHA® is being used primarily as a functional ingredient, not as a sweetener.[1]

Trehalose in meat and poultry

For chicken, pork, beef and other meats, a simple starting point is:

TREHA® at around 2% of the meat weight

So:

1kg meat → about 20g TREHA®

TREHA® can be:

• sprinkled directly onto the meat
• mixed into seasoning
• incorporated into a marinade
• added to a brine

Nagase recommends this level for helping meat retain juiciness, tenderness and eating quality during cooking and holding.[1][2]

Why use TREHA® in meat?

Cooking causes meat proteins to tighten and expel water.

TREHA® can help stabilise proteins and retain moisture, helping the finished meat remain softer and juicier.

Independent research supports this application. A 2025 pork-meatball study used 20g trehalose per kilogram of meat, almost exactly the 2% professional starting level, and found reduced cooking loss and improved water retention.[3]

For caterers, restaurants and meal-prep applications, that is particularly useful where meat may need to be:

• cooked ahead
• held hot
• chilled and reheated
• frozen and thawed

Chicken and fried foods

TREHA® is especially useful in poultry.

Nagase has tested around 2% TREHA® in chicken marinades, reporting better moisture retention and improved eating quality after cooking and holding.[2]

For a simple trial:

500g chicken → around 10g TREHA®

Add it to the normal marinade or seasoning rather than treating it as a separate sweet ingredient.

At this level, the objective is not to make the food sweet. It is to help the meat retain the qualities associated with freshly cooked chicken.

Trehalose in fish and seafood

Fish and seafood are particularly well suited to TREHA® because their proteins and texture can deteriorate quickly through freezing, thawing and cooking.

Nagase recommends:

around 2% TREHA® relative to fish weight

for many fish applications.[1]

TREHA® can help:

• retain moisture
• reduce drip after thawing
• protect texture
• maintain colour
• reduce deterioration during frozen storage

A substantial independent literature supports trehalose's ability to protect fish proteins and reduce quality loss through freezing.[4]

Can TREHA® reduce fishy odour?

Yes, this is one of the more interesting savoury applications.

A Japanese study on mackerel found that trehalose reduced formation of trimethylamine during boiling, one of the compounds strongly associated with fishy odour.

The trehalose-treated fish produced a headspace trimethylamine level around 36% lower than the untreated controlunder the conditions tested.[5]

For culinary use, the practical message is:

TREHA® can help keep cooked fish tasting and smelling cleaner and fresher.

This is particularly relevant for oily fish such as mackerel.

Trehalose in prawns and crustaceans

For prawns, shrimp and similar shellfish, Nagase recommends:

2.5% TREHA® in the cooking water

So for:

1 litre water → about 25g TREHA®

This helps shellfish retain moisture, texture and visual quality during cooking.[1]

TREHA® is also used extensively in research on frozen shrimp and seafood because of its ability to help protect proteins during freezing and thawing.[4]

That makes it useful for both freshly cooked seafood and products that will subsequently be chilled or frozen.

TREHA® and sushi

Sushi combines several foods that benefit from TREHA®:

• rice
• raw fish
• prawns
• squid
• mackerel
• salmon roe

Nagase has developed detailed TREHA® techniques specifically for sushi preparation.[6]

Sushi rice

For rice generally, start with:

TREHA® at 2% of the uncooked rice weight

So:

500g dry rice → 10g TREHA®

Nagase also recommends increasing the cooking water slightly, by around 5%, when TREHA® is added.[1]

TREHA® helps cooked rice remain:

• soft
• moist
• less brittle
• pleasantly sticky

for longer after cooking.

That is particularly valuable in sushi, bento and prepared rice dishes that are not eaten immediately.

TREHA® in sushi vinegar

Another option is to replace:

10–20% of the sugar in sushi vinegar with TREHA®

This reduces sweetness while helping the rice retain a soft texture, particularly when it will be chilled.[6]

Fish for sushi

Nagase also uses TREHA® directly with tuna, salmon, squid, mackerel and white fish to help control drip, moisture, colour and flavour through chilling and freezing.[6]

This makes sushi one of the clearest examples of TREHA® being used across an entire savoury dish rather than in only one ingredient.

Why does TREHA® help rice stay soft?

Cooked rice gradually becomes harder as it cools and sits.

This is largely caused by starch retrogradation, where cooked starch molecules begin to reorganise and firm up.

TREHA® can slow this process.

A 2025 study on acidified sushi rice found that trehalose slowed increases in hardness and helped maintain stickiness during storage.[7]

Importantly, this means TREHA® can help rice retain the texture of freshly cooked rice for longer.

That makes it useful in:

• sushi
• rice bowls
• bento
• takeaway meals
• chilled ready meals
• meal preparation

For ordinary cooking, the simple ratio remains:

2% of uncooked rice weight

Trehalose in noodles and pasta

For noodles and pasta:

Use TREHA® at around 1–2% of flour weight

So:

500g flour → 5–10g TREHA®

Nagase recommends this range to support moisture retention and help cooked noodles maintain a desirable texture after cooking.[1]

This is particularly useful where noodles will be:

• held before serving
• chilled
• reheated
• packed into prepared meals
• delivered

The amount is small enough that the TREHA® is being used for functionality, not sweetness.

Dumplings and wrappers

For dumpling wrappers:

Start around 1–3% of flour weight

So for 500g flour:

5–15g TREHA®

TREHA® can help the dough retain moisture and remain workable.[1]

This can be useful in:

• gyoza
• wontons
• steamed dumplings
• filled pasta
• other wrapped savoury products

particularly where wrappers need to remain flexible before cooking.

Trehalose in vegetables and salads

TREHA® is particularly useful with cut vegetables because moisture loss can quickly make them appear limp and tired.

Nagase recommends:

a 3% TREHA® water solution

with vegetables soaked for around:

30 minutes.[1][2]

That means:

1 litre water → about 30g TREHA®

This can help cut vegetables retain:

• crispness
• moisture
• shape
• colour

What vegetables can be treated?

Nagase has demonstrated the method with foods such as:

• cucumber
• carrot
• radish
• salad vegetables

and similar produce.[2]

For prepared salads, sandwich fillings and catering mise en place, this is a simple way to help vegetables retain a freshly cut appearance and texture.

Blanched vegetables

For vegetables that are being cooked:

Use around 2–3% TREHA® in the cooking or blanching water

This can help retain colour and a pleasantly firm texture.[1]

Independent vegetable research has also investigated trehalose solutions as a way of helping protect plant tissue through blanching and processing.[8]

Trehalose and avocado

Avocado is particularly prone to losing its attractive fresh appearance after cutting.

Nagase has demonstrated peeled avocado soaked for:

30 minutes in a 10% TREHA® solution

before refrigerated storage.[2]

This is considerably higher than the normal 3% salad soak, so it is better treated as a specialist application rather than the standard vegetable ratio.

For ordinary cut vegetables, start with 3%.

Trehalose in egg dishes

For eggs:

Start with TREHA® at around 3% of egg weight

So:

300g beaten egg → about 9g TREHA®

Nagase uses this level to help cooked egg dishes remain:

• moist
• soft
• finely textured
• less rubbery after holding.[1]

This is useful in:

• omelettes
• scrambled egg
• rolled omelette
• egg custards
• quiche fillings
• prepared breakfast foods

Nagase's Japanese rolled-omelette guidance also uses around 3% TREHA®, specifically to retain a moist, fine texture.[9]

Trehalose in savoury egg custard

TREHA® is also used in delicate savoury custards such as Japanese chawanmushi.

Nagase describes TREHA® as helping limit excessive protein tightening during cooking, producing a smoother finished custard.[10]

That same principle can be useful anywhere egg proteins need to set gently rather than becoming coarse or rubbery.

Trehalose in tomato sauce

For tomato sauces:

Start with around 1.5% TREHA® of the total recipe weight

So:

1kg sauce → about 15g TREHA®

Nagase associates this with:

• stronger tomato flavour
• balanced acidity
• brighter colour
• smoother overall taste.[1]

Because TREHA® is only about 40% as sweet as sucrose, this small amount can modify flavour and texture without making the sauce taste sugary.

It can work well in:

• pasta sauce
• pizza sauce
• tomato-based braises
• dipping sauces
• prepared meals

Trehalose in béchamel and creamy sauces

For béchamel:

Use around 3.5% of the complete formulation

So:

1kg béchamel → about 35g TREHA®

Nagase recommends this level for smoother texture, stronger dairy character and improved freeze-thaw performance.[1]

This can be particularly useful in:

• lasagne
• gratins
• croquettes
• frozen ready meals
• filled pastries
• prepared sauces

where a sauce may otherwise separate or become grainy after freezing and reheating.

Prepared meals, takeaway and delivery

TREHA® has particularly useful applications in food that must remain attractive after it leaves the kitchen.

Nagase specifically positions TREHA® for:

• sandwiches
• wraps
• salads
• pasta bowls
• rice dishes
• sushi
• hot-held meat
• takeaway meals
• delivery food.[11]

The challenge in these foods is often not food safety but quality loss.

Meat dries.

Rice firms.

Vegetables soften.

Sauces separate.

Fried food loses crispness.

TREHA® can help slow several of these changes.

For restaurants, caterers and food developers, this can make a dish more forgiving between preparation and consumption.

Does TREHA® make savoury food taste sweet?

At the levels typically used in savoury cooking, generally very little.

TREHA® is about 40% as sweet as ordinary sucrose, and most savoury applications use only around 1–3%.[12]

That means it can perform a technical role without creating an obviously sweet dish.

This is one of TREHA®'s major advantages in savoury food.

It can contribute useful solids and interact with moisture, proteins and starch while having a relatively small effect on perceived sweetness.

A simple guide for the kitchen

If you are trying TREHA® in savoury cooking for the first time, remember these five ratios:

Meat and fish: 2% of food weight

Rice: 2% of uncooked rice weight

Vegetables: 3% soaking solution

Eggs: 3% of egg weight

Tomato sauce: 1.5% of total recipe

These give you a straightforward starting point without needing to reformulate the entire dish.

What should I look for?

When testing TREHA®, compare your normal recipe against a TREHA® version.

Look for differences in:

Meat and fish

• juiciness
• tenderness
• cooking loss
• drip after chilling
• flavour

Rice and noodles

• softness
• moisture
• stickiness
• texture after several hours

Vegetables

• crispness
• colour
• moisture
• visual freshness

Eggs

• softness
• smoothness
• moisture after holding

Sauces

• separation
• texture
• flavour
• behaviour after chilling and reheating

TREHA® becomes most useful when you identify the specific quality you want to preserve.

TREHA® is not just for sweet foods

Trehalose is often introduced as a less-sweet alternative to ordinary sugar.

That description barely captures its savoury potential.

In small quantities, TREHA® can help:

• meat stay juicy
• fish retain texture
• rice stay soft
• vegetables stay crisp
• eggs remain tender
• sauces stay smooth
• prepared foods retain freshly made quality for longer

And because only small quantities are normally required, these benefits can be achieved without turning savoury food into something sweet.

For chefs, caterers and food developers, TREHA® is therefore best understood as a functional kitchen ingredient, rather than simply another sugar.

Buy TREHA® for savoury cooking and food development

Trehalose UK supplies genuine Japanese TREHA® manufactured by Nagase Viita Co., Ltd., formerly Hayashibara.

TREHA® Trehalose Powder 1kg
Ideal for home cooks, chefs and recipe development.

TREHA® Trehalose Powder 2.5kg
For professional kitchens, caterers and regular users.

TREHA® Bulk Trehalose Powder 20kg
For commercial food production, prepared meals and food development.

For broader application ratios, see How Much Trehalose Should I Use?

For sweet culinary applications, see How to Use Trehalose in Baking and How to Use Trehalose in Pastry, Confectionery and Meringue.

A separate guide will look in more detail at how TREHA® helps food retain freshness, texture and quality during storage and freezing.

References & further reading

[1] Nagase Food Ingredients. “TREHA® Usage Chart.” Manufacturer application guidance covering meat, fish, vegetables, rice, noodles, eggs, sauces and other savoury foods.
Nagase TREHA® Usage Chart

[2] Nagase Food Ingredients. “Meet TREHA®.” Manufacturer demonstrations covering meat marinades, vegetables, avocado, tomato products and other food applications.
Nagase TREHA® application demonstrations

[3] 2025 Pork Meatball Study. Research using 20g trehalose per kilogram of pork and reporting reduced cooking loss and improved water retention.
Trehalose and pork water-retention study

[4] Food & Function. Research and review material on trehalose in frozen fish and seafood, including protein stabilisation, water retention and freeze-thaw protection.
Trehalose and seafood preservation research

[5] Japanese Society for Food Science and Technology. Study of trehalose in boiled mackerel, reporting reduced formation of trimethylamine associated with fishy odour.
Trehalose and mackerel odour study

[6] Nagase Food Ingredients. “Sushi.” Professional guidance on TREHA® in sushi rice, tuna, salmon, squid, mackerel, prawns and salmon roe.
Nagase TREHA® sushi guide

[7] Journal of Food Processing and Preservation. 2025 research on acidified sushi rice showing trehalose slowed hardening and helped maintain stickiness during storage.
Trehalose and sushi-rice freshness study

[8] Vegetable Processing Study. Controlled research examining trehalose solutions and their protective effect on carrot tissue during processing.
Trehalose and vegetable texture study

[9] Nagase Food Ingredients. “Japanese Rolled Omelette.” Professional guidance using around 3% TREHA® to produce a moist, fine egg texture.
Nagase TREHA® rolled omelette guidance

[10] Nagase Food Ingredients. “Savory Egg Custard.” Professional TREHA® formulation for smooth egg custard texture.
Nagase savoury egg custard recipe

[11] Nagase Food Ingredients. “Grab & Go” and professional prepared-food guidance covering sandwiches, salads, rice, meat and delivery applications.
Nagase TREHA® prepared-food applications

[12] Nagase Food Ingredients. “TREHA® FAQs.” Manufacturer information on TREHA® sweetness and functional properties.
Nagase TREHA® FAQs