Product Popularization

In the colorful world of food, purple foods have always exuded a unique charm with their beautiful appearance and high nutritional value. From the succulent purple grapes to the delicate purple sweet potatoes, from the refreshing purple cabbage to the rich and mellow blueberries, purple foods have gradually become a symbol of health that contemporary people pursue, with their gorgeous color, rich texture, and outstanding nutritional value.

What Are Purple Foods?

Purple foods are not a strict scientific classification concept, but are defined based on the significant characteristic of the purple appearance of food. The unique purple color mainly comes from the anthocyanin pigments contained in plants. Anthocyanins were first discovered in the seed coat of peanuts in 1947, also known as anthocyanin, anthocyanidin, and belong to the flavonoid class of phenolic compounds. They are a class of glycoside derivatives, usually forming anthocyanidins with one or more glucose, rhamnose, galactose, xylose, arabinose, etc. through glycosidic bonds. They show different colors in different acid-base environments: red in acidic environments, purple in neutral environments, and blue in alkaline environments. Common purple foods cover a variety of categories. In the fruit category, there are blueberries, grapes, mulberries, etc. In the vegetable category, there are purple cabbage, purple sweet potatoes, purple onions, etc. In the grain category, there are purple rice, rye, etc. In addition, some fungi such as purple wood ear mushrooms also belong to the category of purple foods.

Purple Vegetables

Purple cabbage has purple-red leaves in a spherical shape. It is rich in protein, folic acid, vitamin A, and a variety of minerals. It has a high content of anthocyanins and has the effects of antioxidant, anti-aging, and beautifying the skin.

Purple onions have a large amount of anthocyanins in their skin, which can clear free radicals in the body and beautify the skin. In addition, they also contain rich vitamin C, sulfur compounds, and other nutrients, which can stimulate appetite, promote digestion, and are beneficial to cardiovascular health.

Fig contains a variety of vitamins, minerals, dietary fiber, and antioxidants, and has functions such as antioxidant activity, immune system enhancement, and maintenance of skin and vision health.

Purple sweet potatoes have purple flesh. They are rich in more than ten kinds of mineral elements such as zinc, iron, and arsenic, as well as amino acids and vitamins, and can be used as important raw materials in food, chemical, and medical fields.

Purple Fruits

Purple grapes are rich in vitamin C, vitamin K, and potassium. The anthocyanins in the skin are natural antioxidants, which help anti-aging and protect cardiovascular health. They also contain resveratrol, which can delay aging and enhance immunity.

Blackberries contain vitamin C, vitamin K, anthocyanins, ellagic acid, and a variety of minerals. They have the effects of enhancing immunity, protecting cells from oxidative damage, and promoting bone health.

Blueberries have a very high content of antioxidants, which have significant effects on protecting vision, improving memory, and delaying aging. They can also help regulate blood sugar levels and reduce the risk of diabetes.

Purple Grains

Purple corn has purple cobs and kernels. It contains eighteen amino acids, 21 essential trace elements for the human body, a variety of vitamins, and natural pigments. It is particularly rich in selenium, an anti-cancer element, zinc, an element that enhances intelligence, as well as iron, calcium, etc. It also contains rich cellulose, vitamin E, and anthocyanins.

Purple rice is a variety of rice, belonging to the glutinous rice category. It has uniform grains and a purplish-black color, divided into purple japonica and purple glutinous rice. It tastes sweet and delicious, with a rich flavor. It is rich in protein, a variety of vitamins, and minerals such as iron, zinc, and calcium needed by the human body. It has the effects of nourishing blood, invigorating energy, and warming the spleen and stomach.

Purple Fungi

Purple crystal mushroom has medium-sized fruiting bodies in purple or lilac color. This fungus is rich in nutrients, with a complete set of various amino acids. It is particularly high in calcium, iron, carotene, niacin, and trace elements such as copper, zinc, and iodine. It has the effects of nourishing blood, benefiting the spirit, and tonifying the liver.

Nutritional Value of Purple Foods

Strong Antioxidant Capacity

The anthocyanins rich in purple foods are natural strong antioxidants. Their antioxidant capacity is 20 times that of vitamin C and 50 times that of vitamin E. They are one of the strongest antioxidants discovered so far. Therefore, they can effectively remove free radicals in the body, thereby protecting cells from free radical damage. Studies have found that blueberries have a very high content of anthocyanins. Regular consumption can significantly improve the body's antioxidant level and reduce the damage of free radicals to organs such as the eyes and cardiovascular system.

Rich in DNJ (1-deoxynojirimycin), it inhibits the activity of alpha-glucosidase to reduce the digestion and absorption of carbohydrates, indirectly controlling body weight. It is applied in blood sugar control products (such as "Blood Sugar Control Pills") and is often combined with Gymnema sylvestre and Euphorbia helioscopia extracts to form a "plant GLP-1" effect, regulating blood sugar and appetite. 

Promotion of Cardiovascular Health

Numerous studies have shown that purple foods have a positive impact on cardiovascular health. It has been found that the anthocyanins contained in grape skin and grape seeds can reduce cholesterol levels in the blood, inhibit platelet aggregation, and reduce the risk of thrombosis. At the same time, they can also enhance the elasticity of blood vessel walls, improve endothelial function, promote blood circulation, and lower blood pressure.

Vision Protection

In modern society, people use electronic devices for long periods of time, and vision problems are becoming more and more common. Purple foods have unique advantages in protecting vision. Studies have found that the anthocyanins in blueberries can promote the regeneration of rhodopsin in retinal cells. Rhodopsin is a light-sensitive protein that helps the eyes adapt to different light intensities and improve vision. At the same time, anthocyanins can also relieve eye fatigue and prevent retinal degeneration and macular degeneration and other eye diseases.

Potential Anti-Cancer Characteristics

A large number of experiments have shown that anthocyanins have certain anti-cancer potential. They can play an anti-cancer role through various pathways such as regulating the cell cycle, inducing cancer cell apoptosis, and inhibiting tumor angiogenesis. It has been found that the anthocyanins in purple sweet potatoes can inhibit the growth and proliferation of various cancer cells such as liver cancer cells and breast cancer cells. Although purple foods cannot be regarded as a "magic drug" for cancer prevention, they undoubtedly provide a natural boost to cancer prevention as part of a daily diet.

Effective Anti-inflammatory and Antibacterial Effects

The anti-inflammatory and antibacterial effects of anthocyanins are mainly reflected in the ability to destroy the integrity of some cell membranes and cell walls, causing microorganisms to release intracellular components and die. At the same time, they can inhibit the synthesis of proteins, DNA, or RNA in microorganisms, making them unable to survive, or destroy the structural form of the bacteria, making them unable to survive and reproduce normally, thereby achieving anti-inflammatory and antibacterial effects. Studies have found that grape skin and pomace anthocyanins have a good inhibitory effect on Staphylococcus aureus.

Applications of Purple Foods in Food and Beverage

Food Sector
In the field of baked goods, the application of purple foods adds unique charm to the products. Sweet potatoes, with their sweet taste and rich nutrition, are often used to make sweet potato bread, sweet potato cakes, etc. When mashed sweet potatoes are mixed with flour, they not only give the bread and cakes an attractive purple appearance but also make the texture softer and increase the content of dietary fiber and various vitamins. In terms of fillings, blueberry jam, purple rice fillings, and other purple fillings are widely used in traditional pastries such as mooncakes and glutinous rice balls, bringing new taste experiences to these classic delicacies.
In the category of snacks, mulberry hawthorn strips/bars, which are popular among children, integrate mulberries with medicinal value into traditional hawthorn snacks. This provides classic snack lovers with the dual enjoyment of nourishment and new flavors. At the same time, most product formulas insist on not adding any flavorings, colorants, and preservatives, ensuring purity and health, while being rich in high dietary fiber.
In dairy products, purple foods also show unique value. Take yogurt as an example. Yogurt with blueberry, mulberry, and other purple fruit granules or jams added is not only more visually appealing but also enriches the taste and nutrition of the yogurt. Consumers can enjoy the rich taste of yogurt while obtaining the nutrients from purple fruits.

Beverage Sector
In the fruit juice market, purple fruit juices have a place. Purple grape juice, blueberry juice, mulberry juice, and other juices are loved by consumers for their rich fruit aroma and rich nutrition. To meet consumers' dual needs for health and taste, some companies have also launched mixed purple fruit juices, integrating the nutrition of various purple fruits to create more unique flavors.
In the tea drink category, purple foods also play a role. Purple cabbage tea made from purple cabbage is rich in vitamins and anthocyanins and has a unique fragrance. Combining purple sweet potato paste, purple rice, and other ingredients with milk tea to create products such as purple sweet potato milk tea and purple rice milk tea, with rich and layered tastes, has been well received by a wide range of consumers, especially the younger generation.

Purple foods, with their unique definition, rich nutritional value, and wide range of applications, have shown great potential in the food and beverage field. Whether it is health-conscious consumers or food and beverage companies committed to innovation, they can discover endless possibilities in purple foods. In the future, with the increasing attention to healthy diets, it is believed that purple foods will play a more important role on people's dining tables and bring more deliciousness and health to our lives.