How micro-encapsulated algae oil DHA powder is used in foods?

DHA is the food nutritional supplement that is derived from algal oil. It is a long-chain polyunsaturated fatty acid and an important component of brain cell membranes and retina. DHA directly participates in the formation and development of brain cells in fetuses and infants, has a direct impact on the brain's thinking and memory formation processes, and can improve visual acuity and promote the development of visual function.

DHA currently used in food nutritional supplements is mainly derived from fish oil and algae oil. DHA fish oil is cheap and widely used in some Asian and European countries. However, due to objective factors such as pollution, the safety of fish oil has attracted the attention of scientists and food management agencies in various countries. DHA algal oil is extracted from microalgae. Its production technology, safety and application in food, medicine and other fields have become a focus of research institutions and enterprises, and there have been new developments in recent years.

DHA algae oil is extracted from algae plants. There are three ways to cultivate microalgae that can produce DHA: phototrophic (autotrophic), fermentation (heterotrophic) and mixed culture (mixed culture), with the fermentation method being the most common. Algae oil extraction technology has developed rapidly in recent years. Supercritical algae oil extraction technology is gradually replacing the traditional n-hexane extraction method, improving the safety of products. The popularization and application of molecular distillation separation and purification technology has greatly increased the concentration of DHA in microalgae DHA oil.

HSF's algal oil DHA is fermented from Schizochytrium algae.

When DHA algae oil is used in food, except for a few products that use oil directly, microencapsulated products are mainly used. After DHA-rich algae oil is microencapsulated, the wall material forms a protective layer outside the algae oil, which reduces the rate of oxidation and degradation and reduces the fishy smell of the oil. Its form also changes from liquid to solid, making it easier to use and store.

The production of microencapsulated DHA algae oil by HSF adopts the emulsification spray method, that is, the algae oil is first dissolved in a solution of hydrophilic wall material, and an emulsifier is added for homogeneous emulsification, and then spray drying. The emulsification spray drying technology is mature, the product has good solubility and dispersion, and has a long shelf life.

Infant and children's food

Because DHA is crucial to the formation and development of brain cells and visual organs in infants and young children, and is very helpful in the formation of children's brain thinking and memory, many countries have approved DHA algal oil to be used in the production of infant and children's food.

Water-soluble microencapsulated DHA algae oil is commonly used in powdered products such as formula milk powder, and is mainly produced by dry mixing. Water-repellent microcapsule DHA algae oil can be used in foods with high moisture or that need to be heated. At present, liquid pure milk, yogurt, cheese, beverages, biscuits, candies and other foods added with DHA algae oil have been put on the market.

It is worth noting that in order to ensure the safety of infant food, when choosing microencapsulated DHA products as nutritional supplements, attention should be paid to the types of raw materials such as wall materials and emulsifiers, and they should meet the special requirements for raw materials in infant food.

Baked goods

The microcapsulated DHA algae oil is first mixed with flour starch and milk powder, then mixed with water and other raw materials and mixed thoroughly, and then produced according to the subsequent processes of ordinary biscuits. Research shows that DHA algae oil and microcapsule powder can be added to toast bread respectively. When the net addition amount of DHA is 0.10-2.20 mg/g, the additives have no significant impact on the appearance, flavor, taste, acid value and peroxide value of the toast during the 7-day shelf life, and the DHA loss rate of the powder is lower.

Oral preparation

DHA algae oil oral preparations mainly include powder preparations and soft capsules, with the majority being soft capsules, both of which are sold as health care products. Powder preparations are generally produced using microcapsule encapsulation technology, while soft capsules are generally made by directly filling microalgae DHA oil. These two types of products are mostly complex nutrient preparations, and powdered preparations often add milk powder, functional sweeteners and trace elements such as calcium and zinc. Soft capsules often add oils rich in unsaturated fatty acids such as walnut oil and flaxseed oil, as well as oil-soluble nutrients such as vitamin E. The people taking the product are mainly pregnant women, parturient women, infants, children and the elderly.

As a new resource food, DHA algae oil has unique nutritional value, physiological functions and high safety. HSF uses the promotion and application of new culture extraction and separation technologies such as microalgae cultivation technology, supercritical extraction technology and molecular distillation to better guarantee its production safety.

As a nutritional fortifier, DHA can be appropriately added to beverages: dairy products, baked goods, grain and oil products, and deeply processed foods to develop functional foods for adults. In addition, it can also be reasonably added to infant supplementary foods and children's foods such as milk powder, rice noodles, biscuits, noodles, liquid milk, yogurt, fruit and vegetable juice (sauce) compound paste foods, candies, etc.

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