Phosphatidylserine is an important phospholipid compound. It is widely used in nutraceuticals, food, cosmetics, and other fields. Regarding the question of whether bulk phosphatidylserine is heat sensitive, it does have some heat sensitivity. In the production and processing of PS, prolonged high-temperature treatment should be avoided. For example, temperature control during spray drying should be in the lower range (e.g., 40°C-50°C) to minimize thermal degradation. Studies have shown that PS is subject to rapid degradation of its functional components at temperatures above 60 °C.
Is Phosphatidylserine Heat Sensitive?
•Chemical structure basis
Phosphatidylserine is a phospholipid. Its molecular structure consists mainly of a glycerol backbone, fatty acid chains, phosphate groups, and serine residues. The fatty acid chains in its chemical structure usually contain unsaturated bonds. These unsaturated bonds make the molecule susceptible to oxidation and other chemical reactions in a hot environment.
•Physical changes due to heat
Thermal degradation of phosphatidylserine may occur at elevated temperatures, especially when the temperature exceeds 60°C, when the fatty acid chains in the phospholipid molecule break, leading to structural instability. At this point, the biological activity of phosphatidylserine may diminish, affecting its effectiveness. This may result in the loss of its original ordered structure. In the case of phosphatidylserine, this structural change may disassociate it from its otherwise stable cell membrane environment or alter its distribution within the cell membrane.
For example, in some cell studies, when cell samples containing phosphatidylserine were heat-treated, an increased flip-flopping of phosphatidylserine from the inner to the outer layers of the cell membrane was observed by fluorescent labeling. This suggests that heat affects its normal localization in the cell membrane.
•Heat-induced chemical changes
High temperatures cause the breakdown and oxidation of bulk phosphatidylserine. It is easily oxidized due to the unsaturated fatty acid chains in its chemical structure. When heated and in contact with oxygen, oxidation may occur. The oxidized phosphatidylserine produces several oxidation products. Such as lipid peroxides. These oxidation products not only change the chemical properties of phosphatidylserine itself but may also have toxic effects on the surrounding biomolecules.
•Effects on biological systems
Phosphatidylserine is a biologically active substance whose molecular structure contains both hydrophilic and hydrophobic portions, enabling it to form lipid bilayers and participate in the construction and function of cell membranes. When exposed to high temperatures, the molecular structure of phosphatidylserine may change, affecting its stability and biological activity.
What harmful substances are produced when phosphatidylserine is at high temperatures?
•Lipid peroxides
At high temperatures, the unsaturated fatty acid part of phosphatidylserine is easily oxidized to produce lipid peroxides.
Lipid peroxides can attack proteins and lipids on the cell membrane, causing changes in the fluidity and permeability of the cell membrane. In organisms, the integrity of the cell membrane is essential for the normal function of cells. If the cell membrane is damaged, the exchange of substances inside and outside the cell will be out of control. For example, ions (such as potassium ions) inside the cell may leak, and harmful substances outside the cell may enter the cell more easily, thereby affecting the survival and normal metabolism of the cell.
•Aldehyde compounds
Aldehyde substances are produced during the decomposition of phosphatidylserine. Among them, malondialdehyde (MDA) is a typical one. MDA is one of the main decomposition products of polyunsaturated fatty acid peroxidation.
MDA can react with amino groups in proteins to form Schiff bases. This causes proteins to cross-link and denature.
MDA can also react with bases in DNA. This affects gene expression and the transmission of genetic information. If this DNA damage cannot be repaired in time, it may cause gene mutations and increase the risk of cell cancer.
•Free fatty acids and lysophospholipids
High-temperature decomposition will cause the fatty acid chains in bulk phosphatidylserine to detach from the glycerol backbone, producing free fatty acids. If free fatty acids accumulate in large quantities, they will be toxic to cells. At the same time, the decomposition of phosphatidylserine will also produce lysophospholipids. Lysophospholipids are substances with strong surface activity. They can dissolve lipid components in cell membranes. At high concentrations, lysophospholipids can destroy the integrity of cell membranes. This can cause cell contents to leak and cause cell death.
How should phosphatidylserine be stored to avoid heat effects?
• Low-temperature storage
It is generally recommended to store phosphatidylserine bulk in a refrigerator. The temperature is preferably kept at 2 - 8°C. Within this temperature range. Its chemical and physical properties are relatively stable, and the thermal motion of molecules is effectively suppressed. This can reduce the rate of oxidation and other chemical reactions. For example, in laboratory studies, phosphatidylserine standards were stored at 4°C for one year. Its chemical structure and properties changed very little. Analytical methods such as high-performance liquid chromatography (HPLC) have found that the content and purity of its main components have hardly decreased.
•Store away from light
Light will increase the temperature of the environment in which phosphatidylserine is located. At the same time, components such as ultraviolet rays in the light may trigger photochemical reactions and accelerate its decomposition. Therefore, brown glass bottles or containers with light-proof coatings should be used to store phosphatidylserine. Such containers can effectively block ultraviolet rays and most visible light, reducing the adverse effects of light on them.
•Dry environment
Humidity is also very important for the storage of phosphatidylserine. It should be placed in a dry environment, because the presence of moisture may promote the hydrolysis of wholesale phosphatidylserine. Generally speaking, it is more appropriate to keep the relative humidity at 30% - 50%. A desiccant can be placed in the storage container. For example, silica gel desiccant can absorb moisture in the environment to prevent phosphatidylserine from hydrolyzing due to moisture.
•Sealed packaging
The use of well-sealed packaging materials can prevent the entry of oxygen. Oxygen is one of the key factors that lead to the oxidation of bulk phosphatidylserine. Common sealed packaging materials include glass bottles with rubber sealing rings or high-quality plastic sealed bags. After sealed packaging, the oxygen content in the container will gradually decrease, reducing the possibility of oxidation reactions. For example, the use of vacuum packaging technology can almost completely remove the oxygen in the container, further extending the storage life of phosphatidylserine.
•Keep away from heat sources
The storage place should be away from heat sources such as stoves and heaters. Even at normal room temperature, if it is close to a heat source, the local temperature may be too high, harming phosphatidylserine. For example, storing it in a warehouse should be placed at least 1-2 meters away from heat sources such as heating pipes to avoid temperature rise due to heat radiation.
Phosphatidylserine is sensitive to heat and may degrade, inactivate, or change in solubility at high temperatures. Therefore, it is necessary to pay attention to temperature control during product production and storage to avoid long-term high-temperature exposure. To ensure its biological activity and effect, avoiding excessively high-temperature environments during use or storage is recommended. Guanjie Biotech is a bulk phosphatidylserine supplier. We provide common phosphatidylserine bulk powder, bulk phosphatidylserine liquid, phosphatidylserine granular and phosphatidylserine Microencapsulation powder, and water-soluble phosphatidylserine sodium salt. High quality and phosphatidyl serine factory direct sales. Welcome to enquiry:info@gybiotech.com.
