TREHA® trehalose can help food retain more of the moisture, softness, texture, flavour and appearance associated with freshly prepared food.
The most useful way to think about it is not as a conventional preservative, but as a functional ingredient that helps slow some of the physical changes that make food seem stale, dry, tough or tired.
Depending on the food, TREHA® can help with:
- moisture retention
- softness
- starch firming
- protein stability
- freeze-thaw performance
- frozen-food texture
- colour and appearance
- flavour and aroma retention.[1]
This guide focuses on how to use it in practice.
For the science and supporting research, see How Trehalose Helps Food Stay Fresh for Longer →.
Quick Starting Ratios
These are practical starting points based on published research and manufacturer guidance.
| Food | Starting amount of TREHA® | How to use it | Main reason to use it |
|---|---|---|---|
| Bread and rolls | 2–5% of flour weight | Add with dry ingredients | Helps bread stay softer |
| Cooked rice | About 2% of uncooked rice weight | Dissolve in cooking water | Helps rice stay softer after cooling |
| Meat and poultry | About 2% of meat weight | Add to marinade, brine or seasoning | Helps retain moisture |
| Fish and seafood | About 2% of product weight | Add to brine, marinade or formulation | Helps protect moisture and texture |
| Cut vegetables | About 3% solution | Soak briefly before draining | Helps maintain moisture, colour and crispness |
| Cakes and sweet bakes | Start with partial sugar replacement | Add with sugar/dry ingredients | Moisture, softer texture and lower sweetness |
| Frozen foods | Application-specific | Incorporate before freezing | Helps protect structure during freezing and thawing |
| Sauces and prepared meals | Application-specific | Dissolve into liquid phase | Helps maintain texture and moisture |
These are starting points rather than fixed recipes. The optimum amount will depend on the food and the result you want.
For broader dosage guidance, see How Much Trehalose Should I Use? →.
1. Bread and Rolls
Bread becomes stale partly because cooked starch gradually reorganises after baking, making the crumb firmer.
TREHA® can help slow this process.[1]
A useful starting point is:
2–5% TREHA® relative to flour weight.
For example:
| Flour | TREHA® |
|---|---|
| 250g | 5–12.5g |
| 500g | 10–25g |
| 1kg | 20–50g |
For a first trial, around 4% is a sensible middle ground.
So:
500g flour → about 20g TREHA®.
How to add it
Add TREHA® with the other dry ingredients.
You do not need to dissolve it separately.
Best suited to
- white bread
- rolls
- buns
- enriched doughs
- sandwich bread
- bread intended for next-day use
- bread that will be chilled or frozen.
The aim is to help the crumb retain softness for longer.
For detailed bread guidance, see How to Use Trehalose in Bread →.
2. Cakes, Muffins and Sweet Bakes
TREHA® is useful in cakes and other soft baked products because it can help with moisture retention while reducing overall sweetness.
Unlike an intense sweetener, TREHA® still contributes real carbohydrate solids, so it can be incorporated without completely changing the physical structure of the recipe.
A practical approach is to replace part of the ordinary sugar with TREHA® rather than replacing all of it.
How to start
For an existing recipe:
- Keep the total sugar solids broadly similar.
- Replace a modest proportion of the sucrose with TREHA®.
- Bake as normal.
- Compare the product on day one and again after 24–72 hours.
You are looking for:
- softer crumb
- better moisture retention
- less cloying sweetness
- improved eating quality after storage.
Because TREHA® is only about 40% as sweet as sucrose, replacing too much ordinary sugar can noticeably reduce sweetness.
For detailed baking guidance, see How to Use Trehalose in Baking →.
3. Cooked Rice
Rice is one of the easiest applications to trial.
As cooked rice cools, its starch gradually retrogrades, causing it to become firmer and less pleasant to eat.
Research on chilled sushi rice found that trehalose helped slow increases in hardness and firmness while maintaining desirable stickiness.[2]
A good starting point is:
about 2% TREHA® relative to the weight of uncooked rice.
For example:
| Uncooked rice | TREHA® |
|---|---|
| 250g | 5g |
| 500g | 10g |
| 1kg | 20g |
How to add it
Dissolve the TREHA® in the cooking water before adding or cooking the rice.
Then cook normally.
Particularly useful for
- sushi
- bento
- rice bowls
- meal prep
- chilled rice dishes
- grab-and-go food
- ready meals.
The effect becomes most useful when the rice is not being eaten immediately after cooking.
4. Meat and Poultry
TREHA® can help cooked meat retain more moisture.
A practical starting point is:
about 2% of the weight of the meat.[3]
So:
| Meat | TREHA® |
|---|---|
| 500g | about 10g |
| 1kg | about 20g |
| 5kg | about 100g |
A recent pork-meatball study used 20g trehalose per kilogram of meat and found improved water retention and reduced cooking loss.[4]
How to add it
TREHA® can be incorporated into:
- dry seasoning
- marinades
- brines
- minced-meat mixtures
- sausage or meatball formulations.
For a marinade or brine, dissolve the TREHA® into the liquid.
For minced or formed meat products, mix it evenly through the meat.
Particularly useful for
- roast meats
- chicken
- pork
- meatballs
- burgers
- sausages
- cooked meats for reheating
- hot-hold catering
- ready meals.
The greatest benefit is often seen where the food has to survive cooking followed by holding, chilling or reheating.
For more detail, see How to Use Trehalose in Savoury Foods →.
5. Fish and Seafood
Fish proteins are particularly vulnerable to freezing and prolonged frozen storage.
Trehalose has been extensively studied as a cryoprotective ingredient in fish and seafood systems.[1]
For ordinary culinary trials, a useful starting point is again:
around 2% of the product weight.[3]
How to use it
Depending on the product, TREHA® can be added through:
- brines
- marinades
- seasoning systems
- minced fish mixtures
- surimi-style products
- coatings or formulated frozen foods.
Best suited to
- fish intended for freezing
- seafood products
- prepared fish dishes
- minced fish
- frozen ready meals.
The objective is to help maintain moisture, protein structure and texture during frozen storage and thawing.
6. Cut Vegetables
Cut vegetables begin losing moisture and visual quality almost immediately after preparation.
For prepared vegetables, NAGASE recommends starting with approximately a:
3% TREHA® solution.[3]
That means:
30g TREHA® per litre of water.
How to use it
- Dissolve 30g TREHA® in 1 litre of water.
- Immerse the prepared vegetables.
- Drain thoroughly.
- Refrigerate and use as normal.
The exact treatment time will depend on the vegetable and process, so trial on a small batch first.
Particularly useful for
- salad vegetables
- sandwich fillings
- prepared peppers
- carrots
- vegetables for buffets
- restaurant mise en place
- grab-and-go salads.
You are looking for better retention of:
- moisture
- crispness
- colour
- surface appearance.
7. Fruit
Trehalose has also been studied for its ability to help retain fruit quality, particularly aroma and moisture.
Research in fruit systems has found improved retention of volatile aroma compounds during processing and storage.[1]
For fresh fruit, the optimum treatment depends heavily on the fruit and the intended process, so this is not an area where one universal ratio is appropriate.
Where it may be useful
- fruit preparations
- purées
- fruit fillings
- processed fruit
- dehydrated fruit
- frozen fruit systems
- chilled fruit products.
For whole fresh fruit, treatment needs to be developed specifically around the fruit, storage temperature and required shelf life.
8. Sauces, Gravies and Prepared Meals
TREHA® can be useful in prepared foods where the main challenge is maintaining texture through:
cooking → cooling → storage → reheating.
Potential applications include:
- sauces
- gravies
- casseroles
- lasagne
- curries
- rice dishes
- pasta dishes
- ready meals.
How to use it
TREHA® dissolves readily in water, so the simplest approach is usually to incorporate it into the liquid phase of the recipe.
The appropriate amount depends heavily on the formulation.
Start conservatively and compare:
- freshly cooked product
- chilled product
- reheated product.
The goal is to improve moisture and texture after the complete storage-and-reheating cycle, not simply on the day of preparation.
9. Frozen Foods
TREHA® is particularly valuable where food has to survive freezing and thawing.
Freezing can damage:
- proteins
- cell structures
- dough
- sauces
- meat
- seafood
- desserts.
Trehalose can help stabilise these structures and protect food through freeze-thaw cycles.[1]
How to use it
TREHA® should generally be incorporated before freezing.
The correct quantity depends on the food.
Examples include:
- adding it to bread or pastry dough
- incorporating it into meat or fish formulations
- dissolving it into sauces
- using it as part of a frozen-dessert formulation.
For ice cream, gelato and sorbet, use the dedicated guide because sugar balance and freezing behaviour require more precise formulation.
How to Use Trehalose in Ice Cream, Gelato and Sorbet →.
10. Grab-and-Go, Catering and Food-to-Go
TREHA® becomes particularly useful where there is a delay between preparation and eating.
Examples include:
- sandwiches
- wraps
- sushi
- rice bowls
- salads
- prepared meat
- bakery products
- ready meals
- buffet food.
In these situations, several quality problems can happen at once:
- bread firms
- rice hardens
- meat dries
- vegetables soften
- flavours fade.
The best approach is usually not to add one arbitrary quantity of TREHA® to the entire finished dish.
Instead, use it where the quality loss occurs.
For example:
- TREHA® in the bread dough
- TREHA® in the cooked rice
- TREHA® in the meat marinade
- TREHA® treatment for prepared vegetables.
That produces a much more targeted result.
How to Test TREHA® Properly
For kitchen or product-development trials, use a simple side-by-side comparison.
Prepare:
- your normal recipe
- the same recipe with TREHA®.
Keep everything else identical.
Then compare the products:
- immediately after preparation
- after 24 hours
- after refrigeration
- after reheating
- after freezing and thawing, where relevant.
Score characteristics such as:
- moisture
- softness
- firmness
- flavour
- aroma
- appearance
- drip loss
- overall eating quality.
This is much more useful than judging the TREHA® version only when freshly prepared.
The purpose of TREHA® is often to improve how the food performs later.
What TREHA® Does Not Replace
TREHA® helps preserve food quality.
It does not replace:
- refrigeration
- safe cooking temperatures
- hygiene
- HACCP controls
- antimicrobial preservatives where required
- correct packaging
- normal food-safety practice.
The distinction is important.
TREHA® is most useful for extending quality shelf life — the period for which food remains moist, soft, attractive and pleasant to eat.
For the research behind this distinction, see How Trehalose Helps Food Stay Fresh for Longer →.
Where Should You Start?
If you are trying TREHA® for the first time, these are particularly easy applications:
Bread
500g flour + approximately 20g TREHA®.
Rice
500g uncooked rice + approximately 10g TREHA®.
Meat
1kg meat + approximately 20g TREHA®.
Cut Vegetables
30g TREHA® dissolved in 1 litre of water.
These four trials provide a straightforward way to see how TREHA® can affect different types of food.
Once you understand the effect, you can adjust the amount to suit your recipe and desired result.
Buy TREHA® for Kitchen and Food Development
Trehalose UK supplies genuine Japanese TREHA® manufactured by Nagase Viita Co., Ltd., formerly Hayashibara.
For home use, kitchen trials and recipe development:
For regular users and professional kitchens:
For food manufacturers and larger commercial users:
For commercial requirements of 200kg or more:
Bulk TREHA® Supply — 200kg to 1 Tonne+ →
For application or commercial enquiries, contact Trehalose UK → or email sales@trehalose.co.uk.
Further Reading
How Trehalose Helps Food Stay Fresh for Longer →
How Much Trehalose Should I Use? →
How to Use Trehalose in Bread →
How to Use Trehalose in Savoury Foods →
How to Use Trehalose in Ice Cream, Gelato and Sorbet →
References & Further Reading
[1] Anqi Chen, Hugo Tapia, Julie M. Goddard, and Patrick A. Gibney. 2022. “Trehalose and Its Applications in the Food Industry.” Comprehensive Reviews in Food Science and Food Safety 21, no. 6: 5004–5037.
[2] Buchanan et al. 2025. “Application of Trehalose Dihydrate for the Improvement of Cooked Rice Quality and Extension of Shelf Life.” Journal of Food Processing and Preservation.
[3] Nagase Food Ingredients. TREHA® Usage Chart. Manufacturer application guidance covering meat, fish, rice, vegetables and other food applications.
NAGASE TREHA® food information →
[4] 2025. “Effects of the Trehalose and Star Anise Extract on the Water Retention of Pork Meatballs and the Functional Structure of Myofibrillar Protein.”