Abstract

In recent years, the national nutrition level has been improved year by year, but life pressure and balanced nutrition and other problems are more serious. With the deepening of research on the health functions of new food raw materials such as enhancing immunity, more and more new food raw materials will enter the public life, opening a new way of healthy life for the people.  

Several nutritional supplements to boost immunity for reference only:

1.Elderberry Extract

Elderberry is a genus of between 5 and 30 species of shrubs or small trees, formerly placed in the honeysuckle family, Caprifoliaceae, but now shown by genetic evidence to be correctly classified in the moschatel family, Adoxaceae. The genus is native in temperate-to-subtropical regions of both the Northern Hemisphere and the Southern Hemisphere. Elderberry extract is derived from the fruit of the Sambucus nigra or Black Elder. As a part of a long tradition of herbal remedies and traditional folk medicines, the black elder tree is called “the medicine chest of the common people” and its flowers, berries, leaves, bark, and even roots have all been used for their healing properties for centuries. Sambucus Elderberry extract contains many important nutrients for health, such as vitamins A, B and C, flavonoids, tannins, carotenoids, and amino acids.  Now Black Elderberry extract is widely used in dietary supplement for its anti-oxidant effect.

2.Olive Leaf Extract 

The olive leaf is a staple of the Mediterranean diet, which scientists study for its potential to prevent chronic diseases. Research points to lower rates of illnesses and cancer-related deaths among populations that follow this diet. The positive effect is due in part to the powerful and health-boosting benefits of the olive leaf. Olive leaf extract is a concentrated dose of the nutrients in olive tree leaves. It’s a potent source of antioxidants that support your immune system. By fighting cell damage that causes disease, antioxidants work to reduce your risk of many illnesses — but research shows that this activity in olive leaf extract may contribute to a range of other health benefits. Oleuropein and Hydroxytyrosol are the most abundant antioxidants found in Pure Olive Leaf Extract. They are powerful natural antioxidants that has many researched health and wellness benefits and being widely used in food supplements and cosmetics. Olive Leaf Extract antiviral is studied.

3.Matcha Extract

4.Echinacea Extract

Echinacea, a genus including nine species, is a member of the daisy family. Three species are found in common herbal preparations, Echinacea angustifolia, Echinacea pallida, and Echinacea purpurea. Native Americans considered this plant as a blood purifier. Today, echinacea is used mainly as an immune stimulant in order to prevent cold, influenza, and other infections and is one of the most popular herbs in the United States. Fresh herb, freeze-dried herb, and alcoholic extract of the herb are all commercially available. The aerial part of the plant and root fresh or dried can also be used to prepare echinacea tea. One of the constituents of echinacea, arabinogalactan, may have immune boosting capacity. The authors concluded that echinacea extract is capable of preventing symptoms of the common cold after clinical inoculation by cold viruses. Today, echinacea extract are widely used in America, Europe, and elsewhere, particularly for the prevention and treatment of the common cold.

5.Licorice Root Extract

Licorice root is cultivated throughout Europe, Asia, and the Middle East. It is used as a flavoring in candy, other foods, beverages, and tobacco products. Many “licorice” products sold in the United States do not contain actual licorice. Anise oil, which smells and tastes like licorice, is often used instead. Licorice root has a long history of use, going back to ancient Assyrian, Egyptian, Chinese, and Indian cultures. It was used traditionally for treating a variety of conditions, including lung, liver, circulatory, and kidney diseases. Today, licorice root is promoted as a dietary supplement for conditions such as digestive problems, menopausal symptoms, cough, and bacterial and viral infections. Licorice gargles or lozenges have been used to try to prevent or reduce the sore throat that sometimes occurs after surgery. Licorice is also an ingredient in some products for topical use (application to the skin).

6.St John’s Wort Extract

St. John’s wort is a yellow flowering plant that has been used in traditional European medicine since the ancient Greeks. Historically, St. John’s wort has been used for a variety of conditions, including kidney and lung disease, insomnia and depression, and to help with wound healing. Currently, St. John’s wort is promoted for depression, menopausal symptoms, attention deficit hyperactivity disorder (ADHD), somatic symptom disorder (a condition in which a person experiences extreme and exaggerated anxiety about physical symptoms), obsessive disorder -compulsive and other conditions. Topical use (applied to the skin) of St. John’s wort is promoted for various skin conditions, including wounds, bruises, and muscle pain.

7.Ashwagandha Extract

Ashwagandha is one of the most important herbs in Ayurveda, which is a traditional form of alternative medicine based on Indian principles of natural healing. People have used ashwagandha for thousands of years to relieve stress, increase energy levels, and improve concentration. “Ashwagandha” is Sanskrit for “smell of the horse,” which refers to both the herb’s scent and its potential ability to increase strength. Its botanical name is Withania somnifera, and it’s also known by several other names, including “Indian ginseng” and “winter cherry.” The ashwagandha plant is a small shrub with yellow flowers that’s native to India and Southeast Asia. Ashwagandha Extract from the plant’s root or leaves are used to treat a variety of conditions.

8.Ginseng Root Extract

Ginseng is an herb that is rich in antioxidants. Research suggests that it may offer benefits for brain health, immune function, blood sugar control, and more. Ginseng has been shown to help reduce inflammatory markers and help protect against oxidative stress. Ginseng has been shown to improve memory and suppress stress. While more research is needed, it may also be beneficial against cognitive decline, Alzheimer’s disease, depression, and anxiety. Ginseng extract is usually derived from the root of this plant. As an herbal supplement, the extract has anti-inflammatory, anti-cancer, and antioxidant properties. It is also used in the homeopathic treatment of conditions such as depression, stress, low libido, and attention deficit hyperactivity disorder (ADHD). Ginsenosides, also known as panaxoside, inhibit the synthesis of mitotic proteins and ATP in cancer cells, slow cancer cell growth, inhibit cancer cell invasion, inhibit tumor cell metastasis, and inhibit tumor cell apoptosis. promotes and inhibits tumor cell proliferation. Studies have shown that ginseng extract improves balance, prevents diabetes, cures anemia, and strengthens the gastrointestinal system. It has also been shown to provide benefits. Ginseng use improved both the physical and mental effects of stress. It was even found to reduce the effects of alcohol consumption and subsequent hangovers. Ginseng extract is a common ingredient in energy drinks, ginseng teas, and diet aids.

9.Turmeric Extract

Turmeric is a common spice that comes from the root of Curcuma longa. It contains a chemical called curcumin, which might reduce swelling. Turmeric has a warm, bitter taste and is frequently used to flavor or color curry powders, mustards, butters, and cheeses. Because curcumin and other chemicals in turmeric might decrease swelling, it is often used to treat conditions that involve pain and inflammation. People commonly use turmeric for osteoarthritis. It is also used for hay fever, depression, high cholesterol, a type of liver disease, and itching. Turmeric Extract Powder Contains Bioactive Compounds With Powerful Medicinal Properties. Turmeric Rhizome Extract is a Natural Anti-Inflammatory Compound. Turmeric Curcumin Extract Dramatically Increases The Antioxidant Capacity of The Body

 Summary

Immune-boosting foods can boost people’s immune systems and improve their ability to fight off infections. That said, it’s important to remember that the immune system is complex. Eating a healthy, balanced diet is just one way to support immune health. It is also important to be aware of other lifestyle factors that may affect immune system health, such as exercise and not smoking. Anyone who has frequent colds or other illnesses and is concerned about their immune system should see a doctor. 

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References：https://www.sohu.com

https://www.webmd.com/diet/health-benefits-olive-leaf-extract

https://www.sciencedirect.com/topics/medicine-and-dentistry/echinacea

https://www.nccih.nih.gov/health/licorice-root

https://www.healthline.com/nutrition/ashwagandha

https://www.webmd.com/vitamins/ai/ingredientmono-662/turmeric