In the 1890s, a Dutch military physician, Christiaan Eijkman and his assistant discovered that polished “white rice” could cause leg weakness on chickens. It was later proved that the Vitamin B1 removed during the polishing (i.e. the rice bran) was the cause of sick chickens[1]. Subsequently, the micronutrients rich in rice bran were continuously discovered, such as oryzanol, sitosterol, vitamin E, squalene, etc.[2]
Since its establishment in 1994, Delekang has been dedicated to research and manufacture of rice bran series products. We have successively developed oryzanol, ferulic acid, rice bran sterol and phytosterol, continuously exploiting the value of rice bran.
In July 1995, gamma oryzanol was launched in the market.
In 2003, Delekang developed the rice bran oil of first-class in national standard.
In 2005, ferulic acid was introduced.
In the perspective of nutrition, oils and fats is the carrier of fat-soluble Vitamin A, D and E, and also an important part of cell walls and other biological structures. In cooking, oils and fats also affect the flavor of food. [3]
Vitamin E, including our tocopherols and four tocotrienols [4], is a fat-soluble antioxidant that protects cell membrane from reactive oxygen species (ROS). [5]
Compared with tocopherols, tocotrienols have stronger anti-oxidant property[6], which are naturally derived from plant oil, especially rice bran oil.[7]
Edible plant oil | Tocopherols | Tocotrienols | |||||||
---|---|---|---|---|---|---|---|---|---|
Sample size | Concentration(mg/100g) | Sample size | Concentration(mg/100g) | ||||||
α-T | β-T | γ-T | δ-T | α-T3 | (β+γ)-T3 | δ-T3 | |||
Coconut oil | 3 | ... | ... | ... | ... | 2 | 2.89 | 1.52 | ... |
Palm kernel oil | 3 | 0.62 | ... | ... | ... | 2 | 1.94 | ... | ... |
Sesame oil | 46 | 2.67 | 0.26 | 41.16 | 1.11 | 15 | ... | ... | ... |
Walnut oil | 2 | 2.71 | 0.17 | 24.12 | 2.58 | - | - | - | - |
Flaxseed oil | 9 | 3.42 | 1.79 | 36.44 | 1.26 | 1 | 1.00 | ... | ... |
Palm stearin | 2 | 8.44 | ... | ... | ... | 2 | 7.78 | 11.81 | 2.25 |
Blend oil | 35 | 10.76 | 1.49 | 57.03 | 17.75 | - | - | - | - |
Soybean oil | 94 | 11.39 | 2.57 | 65.40 | 23.74 | 31 | 0.05 | 0.03 | 0.04 |
Tea seed oil | 28 | 12.2 | 0.12 | 0.40 | 0.15 | 1 | ... | ... | ... |
Canola oil | 1 | 13.12 | ... | 35.69 | 0.54 | - | - | - | - |
Olive oil | 82 | 14.38 | 0.72 | 1.52 | 0.29 | 30 | 0.48 | ... | ... |
Camellia oil | 20 | 14.81 | 0.49 | 0.68 | 0.14 | 6 | ... | ... | ... |
Palm oil | 19 | 15.26 | 0.53 | 2.92 | 1.11 | 5 | 9.47 | 21.65 | 2.63 |
Grapeseed oil | 4 | 18.98 | 0.79 | 8.22 | 1.23 | 1 | 7.73 | 14.08 | 0.38 |
Rapeseed oil | 68 | 19.64 | 0.57 | 39.25 | 4.49 | 21 | ... | ... | ... |
Rice bran oil | 18 | 19.84 | 0.86 | 4.54 | 0.95 | 11 | 12.18 | 15.81 | 0.41 |
Peanut oil | 71 | 21.68 | 1.38 | 16.40 | 2.00 | 19 | ... | ... | ... |
Corn oil | 74 | 27.45 | 1.77 | 54.28 | 3.25 | 19 | 0.59 | 4.00 | ... |
Safflower oil | 4 | 31.82 | 0.52 | 0.50 | 0.07 | - | - | - | - |
Cottonseed oil | 3 | 55.31 | ... | 40.25 | 2.69 | 3 | 2.82 | ... | ... |
Sunflower oil | 72 | 62.98 | 3.86 | 3.70 | 0.65 | 72 | ... | ... | ... |
Wheat germ oil | 1 | 169.57 | 69.28 | 16.77 | 1.09 | - | - | - | - |
Based on the national standard GB/T 19112-2003
Items | Class 1 | Class 2 | Class 3 |
---|---|---|---|
Color Lovibond 5 1/4″ | Y ≤ 35 R ≤ 3.5 | Y ≤ 35 R ≤ 5.0 | -- |
Color Lovibond 1″ | -- | -- | Y ≤ 35 R ≤ 3.0 |
Acid value (mg KOH/g) | ≤ 0.20 | ≤ 0.30 | ≤ 1.0 |
Peroxide value (mmol/kg) | ≤ 5.0 | ≤ 5.0 | ≤ 7.5 |
Solvent residue (mg/kg) | ND | ND | ≤ 20 |
Soap content (%) | -- | -- | ≤ 0.03 |
Insoluble impurities (%) | ≤ 0.05 | ≤ 0.05 | ≤ 0.05 |
Moisture and volatiles (%) | ≤ 0.05 | ≤ 0.05 | ≤ 0.10 |
Smoke point (°C) | ≥ 215 | ≥ 205 | -- |
Refrigeration test (0°C) | clear and transparent in 24h | clear and transparent in 5.5h | -- |
Iodine value (g/100g) | 92-115 | 92-115 | 92-115 |
Store in light-tight, airtight and dry condition
CAS number: 11042-64-1
HS code: 29189900.90
National standard code: WS1-47(B)-89-2016
Gamma oryzanol is a lipid composite mainly derived from rice bran. It is used to improve climacteric syndrome, anxiety, insomnia in Japan,[8] while in China, it is used for dysautonomia premenstrual syndrome and climacteric syndrome. [9]
24-Methylene cycloartanyl ferulate(35-40%)
Cycloartenyl Ferulate(25-30%)
Campesteryl ferulate (10-15%)
β-sitosteryl ferulate (5-10%)
Items | Standard |
---|---|
Assay | 97.0 ~ 103.0% |
Loss on drying | ≤ 0.8% |
Residue on ignition | ≤ 0.2% |
Heavy metal | ≤ 10 mg/kg |
Arsenic | ≤ 2 mg/kg |
Solubility | Soluble in acetone, slightly soluble in orthane, insoluble in water |
20 kg/drum
Store in light-tight, airtight and dry condition
CAS number: 537-98-4
HS code: 29189900.90
Other name: (2E)-3-(4-hydroxy-3-methoxyphenyl)prop-2-enoic acid
Chemical formula C10H10O4
Molecular mass 194.184
Ferulic acid is a very common component in natural plants and usually used as a raw material for spices. It mainly exists in the cell wall. Its tronger antioxidant property can protect cell, which make ferulic acid applicable as antioxidant and photostage inhabitation in cosmetics [10]. Ferulic acid also presents in some herbal medicines, such as female ginseng, Cimicifuga foetida and Ligusticum wallichii. [11]
Items | Standard |
---|---|
Content | ≥ 99.0% |
Loss on drying | ≤ 0.5% |
Residue on ignition | ≤ 0.2% |
Heavy metal | ≤ 10 mg/kg |
Arsenic | ≤ 2 mg/kg |
Melting point | 170.0~174.0°C |
20 kg/drum
Store in light-tight, airtight and dry condition
CAS number: 83-46-5
HS number: 29061990.90
Sterols are the major trace substance in fat.
Cholesterol is a type of sterols, the main sterols in animal’s fat. There are two types of sterols in human blood: high-density lipoprotein (HDL)cholesterol and low-density lipoprotein (LDL) cholesterol. Excessive accumulation of LDL cholesterol in the serum can lead to blockage of arteries and heart disease.
Acceding to the EFSA
Moderate intake of phytosterol can lower blood cholesterol level and reduce the risk of coronary heart disease. [12]
The U.S. Food and Drug Administration (FDA) allows food labels to be noted:
Phytosterol can reduce the risk of coronary heart disease. [13]
Health Canada also allows it to be shown on food labels that plant sterol can help reduce cholesterol level. [14]
Although phytosterol has good stability, it can cause oxidation when it is exposed to high temperatures or the air. Eating oxidizing phytosterols can lead to inflammation, unstable hormone levels, carcinogenicity and other health problems.
Industrial grade: it can be used as the starting material for steroid drugs
Food grade: it can be used as food additives, health care raw materials
Specification
Items | 90/50 Size | 95/50 Size |
---|---|---|
Total sterol | ≥90.0% | ≥95.0% |
β-sitosterol | ≥50.0% | ≥50.0% |
Stigmasterol | / | / |
Campesterol | / | / |
Residue on ignition | ≤0.5% | ≤0.5% |
Loss on drying | ≤2.0% | ≤2.0% |
Heavy metal | ≤10mg/kg | ≤10mg/kg |
Arsenic | ≤2mg/kg | ≤2mg/kg |
Solubility | Soluble in thermal ethanol, slightly soluble in ethanol, insoluble in water. | Soluble in thermal ethanol, slightly soluble in ethanol, insoluble in water. |
20 kg/drum
Store in airtight, light-tight and dry condition
CAS number: 83-46-5
HS custom number: 2906199090
National standard code: WS-10001-(HD-0908)-2002
Sterol, also known as Rice Bran Sterol Tablets in China, is used for bleeding gums, periodontal abscesses and other conditions caused by periodontal disease.
Items | specification |
---|---|
Total sterol | ≥63.0% |
unsaponifiable matter | ≥90.0% |
Saponification | ≤6.5mg KOH/g |
Acid value | ≤5.0mg KOH/g |
Drying on loss | ≤2.0% |
The total number of aerobic bacteria | ≤1000 cfu/g |
The total number of molds and yeasts | ≤100 cfu/g |
E. coli | Negative |
25 kg/drum
Prevented from light and stored in airtight and dry condition
Ginkgo, native to China, is one of the oldest trees species in the world. It can date back to Carboniferous period (230,000 years ago). The average lifespan of ginkgo is between 2000 and 4000 years and its vitality is very tenacious.
As a traditional Chinese medical material, ginkgo has been cultivated and used for thousands of years.
In 2011, the first workshop of ginkgo biloba extract was put into trial production. In such a chaotic industry back then, we have always insisted on manufacturing authentic products.
In 2015, the former CFDA (China Food and Drug Administration, now the National Medical Products Administration) conducted an investigation on 90 Ginkgo biloba extract manufacturers across the country. Delekang is one of the few companies whose products were all certified as qualified. Our persistency in quality has been rewarded and we have gained a firm foothold in the market.
In 2016,Delekang’s ginkgo biloba extract was approved as API (Active Pharmaceutical Ingredient) by the former Jiangsu FDA. In the subsequent cooperation with various drug companies, we have been continuously optimizing the quality of ginkgo biloba extract to be able to consist stably in various dosage forms.
By 2019, we pushed the quality to a whole new level. Ginkgolic acid was controlled below 1ppm, and ginkgo toxin below 50 ppm. Pesticide residues met the EU regulation on maximum pesticide residue levels (EC No 396/2005).
In 2019, shikimic acid was found during the process of ginkgo biloba extraction, which could greatly reduce the cost of shikimic acid in the market.
Mass production of shikimic acid was achieved in 2020.
The data tell everything. With technical progress during the last ten years, we have made high-quality products more affordable for more people.
CAS number:90045-36-6
HS code:13021940.00
In the 1960s, Dr Willmar Schwabe Group developed standardized Ginkgo biloba extract EGb 761, which promotes vasodilation and improves blood flow through and is used to treat memory loss, tinnitus etc. [1]. In the assessment report of Ginkgo biloba in 2014, the European Medicines Agency recognized the therapeutic effect of Ginkgo biloba extract on the improvement of (age-associated) cognitive impairment and of quality of life in mild dementia[2]. In the United States, Ginkgo biloba extract is widely used as a dietary supplement [3]. In China, the main functions of ginkgo biloba extract preparations are:
Promoting blood circulation to remove obstruction in collaterals. It can be used for patients with chest blockage, heartache, stroke, hemiplegia, stiff tongue caused by blood stasis and obstruction of the collaterals, and stable angina pectoris and cerebral infarction with the syndromes mentioned above. [4] The Ginkgo biloba extract produced by Delekang has been approved by the Administration for Market Regulation (formerly Food and Drug Administration) and can be used as API (Active Pharmaceutical Ingredient) for the production of various drug preparations. At the same time, we have also obtained the "Food Production License", which permits us to produce Ginkgo biloba extract for dietary supplement.
Ginkgo biloba extract is a very common ingredient that almost every plant extract manufacturer can make. However, only few manufacturer can make ginkgo biloba extract of good quality, not to mention excellent quality. In the past decade, we have been constantly refreshing the quality level of ginkgo biloba extract:
Through years of cooperation with ginkgo leaf suppliers, we have been extensively collecting and analyzing the quality data of ginkgo leaves from different regions to find suitable raw materials for standardized products with stable quality.
Complying with Chinese Pharmacopoeia, U.S. Pharmacopoeia and European Pharmacopoeia standards
Complying with EU regulation on maximum pesticide residue levels (EC No 396/2005) .
Limiting ginkgolic acid below 1ppm
Limiting ginkgotoxin below 50ppm
The production line has been approved by China FDA
Compatible with most oral dosage forms
While ensuring high quality, Delekang is also striving to make products more affordable. Unlike plant extract manufacturers making everything, we have the following advantages as a specialized manufacturer:
Through technology development, the raw materials are fully utilized to reduce the cost of raw materials. The extracted ginkgo leaves and waste materials can be used to extract sodium copper chlorophyllin and shikimic acid, and the used leaves can be used as fuel to provide renewable energy for the production line.
Through scale effect, the fixed cost per unit, such as investment in R&D, equipment, and facilities, can be diluted through a larger output.
Unlike the universal extraction equipment, our specialized production line designed for ginkgo biloba is more effective in controlling quality and reducing cost of production.
Items | CP | USP | EP | In-house |
---|---|---|---|---|
Flavonol glycosides | ≥24.0% | 22.0-27.0% | 22.0-27.0% | 22.0-27.0% |
Terpene lactones | ≥6.0% | 5.4-12.0% | 5.4-6.6% | 5.4-12.0% |
Bilobalide | / | 2.6-5.8% | 2.6-3.2% | 2.6-5.8% |
Ginkgolide | / | 2.8-6.2% | 2.8-3.4% | 2.8-6.2% |
Quercetin/kaempferol ratio | 0.8-1.2 | / | / | 0.8-1.2 |
Isorhamnetin/Quercetin ratio | ≥0.15 | / | / | ≥0.15 |
Ginkgolic acid | ≤5mg/kg | ≤5mg/kg | ≤5mg/ kg | ≤1mg/kg |
Free quercetin | ≤10mg/g | ≤5mg/g | / | ≤10mg/g |
Free kaempferol | ≤10mg/g | / | / | ≤10mg/g |
Free isorhamnetin | ≤4mg/g | / | / | ≤4mg/g |
Rutin | / | ≤4.0% | / | / |
Pesticide residues | / | USP<561> | EC396/2005 | / |
Loss on drying | ≤5.0% | ≤5.0% | ≤5.0% | ≤4.0% |
Residue on ignition | ≤0.8% | / | / | ≤0.8% |
Heavy metals | ≤20m g/kg | / | / | ≤15m g/kg |
HPLC Fingerprint | ≥0.90 | / | / | ≥0.90 |
25 kg/drums; protected from light; stored in airtight and dry condition
CAS number: 138-59-0
HS Custom code: 2918190090
Items | sepcifications |
---|---|
Specific rotation[α]D 25°C/° | -175~-184 |
Content | ≧98.0% |
Heavy metals | ≦20ppm |
Residue on ignition | ≤0.8 % |
Loss on drying | ≤1.0% |
Solubility | 18% m/v (soluble in water) |
Molecular mass | 174.15 |
Appearance | white to light yellow fine powder |
Plant origin | Ginkgo biloba L. |
25kg/drum Prevented from light and stored in airtight and dry condition
CAS number: 84650-60-2
HS customs number:
Tea polyphenols, freely soluble in water, ethanol, ethyl acetate and slightly soluble in oils, are white to brown powdery solids or crystals with astringent taste. They are stable under hot or acidic condition in the range of PH 2~7. They are slightly hygroscopic, the PH of their aqueous solution is 3~4. Tea polyphenols are easy to be oxidized and become brown under alkaline condition. Green-black compounds are formed when they meet iron ions.
Specifications | 98/80/50 | 98/75/45 | 50/30/15 |
---|---|---|---|
Total polyphenols | ≥98.0% | ≥98.0% | ≥50.0% |
Catechins | ≥80.0% | ≥75.0% | ≥30.0% |
EGCG | ≥50.0% | ≥45.0% | ≥15.0% |
Caffeine | ≤0.5% | ≤1.0% | ≤10.0% |
Loss on drying | ≤5.0% | ≤5.0% | ≤5.0% |
Residue on ignition | ≤3.0% | ≤3.0% | ≤3.0% |
Heavy metals | ≤10.0 mg/kg | ≤10.0 mg/kg | ≤10.0 mg/kg |
Lead | ≤5.0 mg/kg | ≤5.0 mg/kg | ≤5.0 mg/kg |
Arsenic | ≤2.0 mg/kg | ≤2.0 mg/kg | ≤2.0 mg/kg |
25kg/drum
Store in dark, airtight and dry place.
CAS number: 3081-61-6
HS customs number:
Specification | TP20 | TP30 | TP40 | TP90 |
---|---|---|---|---|
Appearance | light yellow to light brown or dark brown powder | white or almost white powder | ||
Loss on drying | ≤6.0% | |||
Heavy metal | ≤10mg/kg | |||
Lead | ≤2mg/kg | |||
Arsenic | ≤2mg/kg | |||
Theanine | ≥20.0% | ≥30.0% | ≥40.0% | ≥90.0% |
Total aerobic bacteria(cfu/g) | ≤1000 | |||
Total molds and yeasts(cfu/g) | ≤100 | |||
Escherichia Coli(1g) | negative |
20kg/drum
prevented from light and stored in airtight and dry condition