What is the shelf life of plant hollow capsules?

The shelf life of plant hollow capsules is usually 2 to 3 years, but the specific duration may vary due to factors such as raw materials, production processes, storage conditions, and packaging methods. The following are detailed explanations and suggestions for extending the shelf life:

1, Core influencing factors of shelf life

Hydroxypropyl methylcellulose (HPMC): The most common plant-based capsule material, with high chemical stability and a shelf life of generally 2-3 years.

Pluran polysaccharide: made by microbial fermentation, with low breathability and a shelf life that may be extended to more than 3 years, but at a higher cost.

Starch based materials, such as modified starch, are prone to moisture degradation and typically have a short shelf life (1.5-2 years), requiring strict moisture resistance.

High purity raw materials for production process: Raw materials with less impurities can reduce the risk of microbial growth and extend the shelf life.

Advanced granulation technology: For example, spray drying or fluidized bed granulation can improve the uniformity of capsules and reduce moisture absorption.

Sterilization process: using ethylene oxide (EO) or irradiation sterilization can effectively kill microorganisms and extend the shelf life to more than 3 years.

Storage condition temperature: It is recommended to store in an environment of 15-25 ℃. High temperature (>30 ℃) will accelerate material aging, while low temperature (<5 ℃) may cause the capsule to become brittle.

Humidity: The relative humidity should be controlled between 35% and 65%. If the humidity is too high (>70%), it can cause the capsule to absorb moisture, deform, or adhere.

Light exposure: Avoid direct sunlight, as ultraviolet radiation can degrade plasticizers or pigments in plant capsules.

Sealing: Unopened packaging can isolate oxygen and moisture, and the shelf life is extended by 1-2 years compared to after opening.

Packaging method: Double aluminum foil packaging: excellent moisture resistance and light avoidance performance, with a shelf life of up to 3 years.

PE/PP plastic bottles: need to be used with desiccants, with a shelf life of about 2 years.

Composite film bag: Low cost, but poor sealing, usually with a shelf life of 1.5-2 years.

2, Practical suggestions for extending shelf life

Unopened products should be stored in a cool and dry place (such as a wardrobe or drawer) to avoid coexistence with volatile substances such as cosmetics and cleaning agents.

Regularly check the integrity of the packaging. If the aluminum foil is damaged or the bottle cap is loose, it should be immediately used or transferred to a sealed container.

The remaining capsules of the opened product should be promptly returned to the original bottle and the cap tightened, or transferred to a sealed container with a desiccant.

Avoid direct contact with the capsule by hand to prevent sweat or oil from contaminating the surface.

It is recommended to use the opened products, especially starch based capsules, within 3-6 months.

Special scenario handling for high humidity areas: Place food grade desiccants (such as silicone bags) inside the packaging and check monthly for desiccant failure (color changes).

During transportation: If long-distance transportation is required, choose logistics with temperature recorders to ensure that the ambient temperature does not exceed 30 ℃.

Long term storage: Capsules can be divided into small batches and placed in vacuum bags. After vacuuming, they can be frozen and stored (the low-temperature resistance of the capsules needs to be confirmed).

3, Risks and Handling of Expired Capsules

Potential risk of physical changes: The capsule may become brittle, fragile, or adhered, leading to leakage of the filling material or inaccurate dosage.

Chemical changes: The degradation of raw materials may produce harmful substances (such as formaldehyde produced by the decomposition of hydroxypropyl methyl cellulose).

Microbial contamination: After expiration, moisture resistance decreases, making it easy to breed mold or bacteria, increasing health risks.

Contact the supplier for handling expired products: Some manufacturers provide recycling services for expired products, please inquire if they can be returned or exchanged.

Safe disposal: Mix the capsule with coffee grounds or cat litter and seal it to prevent accidental ingestion or environmental pollution.

Avoid repeated use: Do not continue to use expired capsules to save costs, especially for filling drugs or health products.

4, How to determine if the capsule has deteriorated

Normal appearance inspection of the capsule: smooth surface, uniform color, no cracks or depressions.

Deteriorated capsules: The surface becomes sticky, discolored (such as yellow or gray), or moldy.

Normal tactile test capsule: can be restored to its original state by gently pinching with hand, without any adhesive feeling.

Deteriorated capsules: have a soft or hard texture, are prone to rupture or adhere into lumps.

Odor identification: Normal capsules: no odor or only slight raw material odor (such as HPMC capsules may have a slight sweet taste).

Deteriorated capsules: emit acidic, moldy, or chemically irritating odors.