Natural matcha powder is a refined, ultra-fine tea powder raw material in baked goods, dairy products, snack foods, pre-made foods, and functional foods. The stability of this raw material directly affects the color, flavor, physicochemical properties, and shelf life of the final product. Currently, food processing companies mainly purchase large quantities of commercial matcha powder in ton-scale or box-packaged forms. The storage conditions for these bulk matcha powder products are different from those of retail small-packaged matcha. Storage management must follow strict food factory requirements, including warehouse compliance, batch rotation, and large-scale production use. Should matcha powder be kept in the fridge?
What Are the Properties of matcha powder?
Core Physicochemical Deterioration determines the Need for Temperature-Controlled Storage
Bulk edible natural matcha powder is produced using an ultra-fine cell-wall-breaking milling process from steamed green tea. It does not undergo deep fermentation or high-temperature roasting. It retains chlorophyll, tea polyphenols, theanine, and unsaturated lipids. Compared with ordinary green tea powder and flavored tea powder, it is less stable. Its degradation is measurable and irreversible. The main deterioration factors fall into four categories. These are the key reasons why temperature-controlled storage is required in the industry.
• First, chlorophyll photothermal degradation and color change.
The bright green color of food-grade matcha powder comes from chlorophyll. At temperatures above 20°C and under long-term light exposure, chlorophyll breaks down quickly. The natural matcha powder turns dull and yellow. This causes uneven color in beverages, discoloration on baked goods, and visible color variation in prepared foods. It may fail sensory quality standards.
• Second, oxidation of tea polyphenols and flavor loss.
Under normal temperature and oxygen exposure, tea polyphenols oxidize and polymerize continuously. This reduces the fresh grassy aroma. It also creates a bitter and stale taste. The natural creamy and sweet notes of matcha weaken. This makes it unsuitable for high-end tea drinks, fillings, and meal replacement formulations.
• Third, moisture absorption, clumping, and microbial growth.
Natural matcha powder has very fine particles and a large surface area. When relative humidity exceeds 60%, it absorbs moisture quickly. This leads to clumping and hardening. Total bacterial counts, mold, and yeast levels increase rapidly. It may fail GB 4789 microbiological standards.
• Fourth, odor absorption and cross-contamination.
Matcha bulk powder has a porous structure and strong adsorption ability. During normal storage, it easily absorbs odors from the environment. These include workshop fumes, disinfectants, oils, and chemical materials. This causes batch-level flavor contamination and makes it unsuitable for standardized food production.
These four deterioration processes all increase with temperature. Lower temperature and refrigeration significantly slow reaction rates. This reduces raw material loss, lowers production costs, and supports standardized warehouse management in industrial food manufacturing.
Should Matcha Powder Be Kept In The Fridge?
In accordance with industry group standards and Guanjie Biotech's factory storage grading system, bulk matcha powder does not have a single refrigeration requirement. Instead, natural matcha powder is divided into three storage models based on sealing status, usage cycle, storage environment, and raw material grade: ambient temperature storage, refrigerated storage, and frozen storage. This system supports different inventory turnover needs of food companies of various sizes.
(I) Ambient Temperature Storage
Unopened, original vacuum-sealed, light-proof aluminum foil packaging and food-grade high-barrier outer packaging can be stored at room temperature under specific conditions. These conditions include a constant temperature of 10–20°C, relative humidity ≤60%, protection from light and oxygen, no odor contamination, and distance from heat sources and pipelines. Under these conditions, food-grade bulk matcha powder can be stored at ambient temperature for up to 12 months.
This model is suitable for small and medium-sized food companies with high-frequency monthly inventory turnover. In these cases, stock is usually used within 1–3 months. The factory provides a cool, dedicated raw material warehouse, so cold storage is not needed. This reduces energy costs.
This storage method applies to mid-range flavored matcha, roasted base natural matcha powder, and bulk matcha for decoration. These products have lower requirements for color and flavor precision. Proper room temperature storage does not affect mass production quality.
(II) Refrigerated Storage
According to T/CTMA 027.1-2021, the optimal refrigerated storage temperature for bulk matcha powder is ≤10°C, with an ideal range of 4–8°C. This method is suitable for most medium-to-large food factories, export food companies, and chain tea beverage central warehouses. It is the recommended commercial storage method for bulk matcha.
There are three main use cases.
First, large quantities of inventory after opening the original packaging. Once opened, oxygen enters the package. This increases oxidation speed at room temperature by more than three times. Therefore, natural matcha powder must be sealed and stored in a food-grade cold storage facility.
Second, high-grade steamed green matcha, organic edible matcha, and export-grade customized matcha. These products must meet strict overseas standards. Their color and flavor requirements are strict. Room temperature storage may cause them to fail compliance.
Third, factories in hot spring and summer regions or coastal high-humidity areas. In these regions, ambient temperature often exceeds 22°C and humidity is high. Room temperature storage of natural matcha powder is not stable. Refrigeration is required for all batches.
Under proper refrigerated conditions, unopened bulk matcha powder can be stored for up to 24 months. After opening and resealing, it can be stored for 4–6 months. This significantly reduces raw material loss.
(III) Long-Term Storage
For companies with quarterly or semi-annual bulk stockpiling, or storage cycles longer than 6 months, -18°C food-grade frozen storage is recommended. This slows enzymatic activity and better preserves the color, flavor, and active compounds of matcha powder.
This method is commonly used for pre-made holiday foods, export stockpiling, and R&D raw material storage. Guanjie Biotech's global transit and warehousing center uses cold-chain frozen storage for large cross-border sea freight natural matcha powder orders. This ensures stable raw material quality during international transport.
How Should Food Industry Store Matcha Powder?
Most food companies experience raw material loss not because refrigeration is missing, but because refrigeration practices fail to meet food safety standards. This leads to condensation, moisture absorption, repeated temperature changes, and cross-contamination. Based on B2B factory production scenarios, four key operational guidelines for non-compliance are defined.
First, do not open warm packaging directly. Bulk matcha powder stored in refrigerated or frozen conditions must be fully acclimated after removal. Wait until the outer packaging reaches room temperature before opening. Opening cold packaging causes moisture in the air to condense on the powder surface. This leads to clumping, mold growth, and spoilage of the entire batch. This is a common storage error in food factories.
Second, use independent refrigerated storage. Natural matcha powder must not be stored with meat, fruits, vegetables, seasonings, disinfectants, or spices. The powder easily absorbs odors. Cross-contamination can occur. This results in off-flavors in the final product and may cause quality inspection failures.
Third, apply secondary sealing and closed-loop storage. After opening bulk natural matcha powder bags or barrels, remove excess air immediately. Reseal using food-grade clips or a vacuum sealer. Then place the material in a light-proof outer container. This isolates it from oxygen and moisture in cold storage. Do not store it in an open state.
Fourth, avoid repeated temperature cycling. Do not return natural matcha powder to cold storage after it has returned to room temperature. Temperature changes accelerate degradation of active compounds. Each batch should be managed by use-on-demand principles. Separate storage areas should be used for room-temperature reserves and refrigerated materials.
A Comparison of Cost and Quality Between Ambient Temperature and Refrigerated Storage
This article objectively compares two storage methods. It helps food companies control costs and define product positioning. It also helps them choose the right inventory management solution.
Ambient temperature storage is suitable for low-end puffed food coatings, common baked biscuit ingredients, and short-term raw materials. Its advantages include no cold storage energy consumption and easy warehousing. Its disadvantages include poor flavor retention, fast color loss, short storage life, and a higher risk of moisture-related spoilage.
Refrigerated storage is suitable for high-end tea beverage bases, natural matcha powder dairy products, meal replacement powders, export-grade desserts, and organic health food ingredients. Its disadvantage is higher energy consumption for cold storage maintenance. Its advantages include over 60% higher chlorophyll retention, stable flavor, controlled microbial levels, and better compliance with quality inspections for branded foods and export markets.
FAQs:
1. Should matcha powder be kept in the fridge?
Natural matcha powder does not always require refrigeration. In industrial food applications, storage depends on packaging status, turnover rate, and product grade. Unopened, vacuum-sealed matcha can be stored at controlled ambient conditions. However, refrigerated storage is strongly recommended for opened, high-grade, export-grade, or long-term stored matcha to maintain color, flavor, and stability.
2. Why is temperature control important for matcha powder?
Matcha contains chlorophyll, tea polyphenols, theanine, and unsaturated lipids. These compounds are sensitive to heat, light, oxygen, and moisture. Without proper storage control, matcha may undergo:
• Chlorophyll degradation (color fading from green to yellow)
• Oxidation of polyphenols (loss of fresh aroma, increased bitterness)
• Moisture absorption (clumping and microbial growth)
• Odor adsorption (cross-contamination and flavor defects)
Temperature control slows all these degradation pathways.
3. What happens if matcha is stored at room temperature?
When stored in stable, cool, and dry environments (10–20°C, humidity ≤60%), unopened natural matcha powder can remain stable for up to 12 months. However, in higher temperature or humidity conditions, quality deterioration accelerates, leading to:
• Faster color loss
• Reduced flavor intensity
• Higher risk of clumping
• Shorter usable shelf life
Room temperature storage is best suited for short-term industrial turnover use.
4. When should matcha powder be refrigerated?
Refrigeration (4–8°C) is recommended when:
• The packaging has been opened
• The natural matcha powder is high-grade or export quality
• The warehouse is in a hot or humid region
• Storage exceeds short-term turnover cycles
Under refrigerated conditions, shelf life can extend up to 24 months unopened, and 4–6 months after opening (if properly resealed).
5. Can matcha be moved in and out of the fridge repeatedly?
No. Repeated temperature cycling should be avoided. Moving matcha between cold and warm environments causes condensation, which leads to:
• Surface moisture absorption
• Clumping and spoilage risk
• Accelerated oxidation
Each batch of natural matcha powder should follow a stable storage path (room temperature OR refrigerated OR frozen).
6. How should opened matcha powder be stored?
After opening:
• Immediately reseal with vacuum or airtight packaging
• Minimize oxygen exposure
• Store in a dedicated, odor-free refrigerated environment
• Avoid mixing with strong-smelling materials (spices, chemicals, fruits)
• Proper sealing is critical to slow oxidation and moisture uptake.
Summary
In summary, for compliant mass production of natural matcha powder in the food industry, large quantities of unopened, original-pack matcha can be stored at room temperature if the environment is cool and dry, and turnover is short. However, matcha from high-temperature or high-humidity environments, opened products, high-grade commercial matcha, long-term stock, and export materials should be stored under standardized refrigeration.
The main value of refrigeration is not only longer shelf life. It also stabilizes color, flavor, and physicochemical and microbiological quality. This ensures consistent taste and appearance in the final product. It also reduces losses from color variation, flavor rework, and raw material waste.
For global food procurement companies, choosing a large-scale matcha supplier with standardized quality control, professional storage guidance, and global cold chain capability can improve warehouse efficiency. It also helps meet food safety regulations in different countries and ensures long-term raw material stability.
To support diverse storage conditions of natural matcha powder in over 100 countries, Guanjie Biotech provides four key services: export packaging, storage guidance, cold chain supply, and quality control. These help customers manage storage more easily and efficiently. Welcome to enquire with us at info@gybiotech.com.
References:
[1] National Technical Committee on Standardization of Tea. T/CTMA 027.1-2021 Technical Specification for Storage and Preservation of Matcha [S]. China Tea Marketing Association, 2021.
[2] National Health Commission of the People's Republic of China, State Administration for Market Regulation. GB 4789.2-2022 National Food Safety Standard - Microbiological
[3] Examination of Food - Determination of Total Colony Count [S]. Beijing: China Standards Press, 2022.
[4] Haraguchi, Y., Sano, H., Nakazato, K., Tomaru, K., Yorishita, M., Arakawa, M., & Sawamura, S. (2002). Effects of storage conditions on quality of matcha [powdered tea]. Tea Research Journal, 2002(93), 1-8.
[5] Kim, J. M., Kang, J. Y., Park, S. K., Han, H. J., Lee, K. Y., Kim, A. N., Kim, J. C., Choi, S. G., & Heo, H. J. (2020). Effect of storage temperature on the antioxidant activity and catechins stability of Matcha (Camellia sinensis). Food Science and Biotechnology, 29(9), 1261-1271.
[6] Zhang, H., Wang, L. L., Wu, G. Q., et al. (2020). Quality Changes and Predictive Modeling of Shelf Life of Matcha Stored at Different Temperatures. Food Science, 41(3), 198-204.
