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2021 Plant Extracts Review Issue 2

Date : 2021/11/01

The Second Issue - Vine tea Extract-For food and medicine use in China

Vine tea /Ampelopsis grossedentata

Liane is slender and unable to stand upright

Only attach to other plants or supports, wrap or climb upward. 

It is also called Maoyan Qingshuang tea, Qingshung Guteng tea, Longxu tea, Meicha tea, etc.

It is mainly distributed in Hunan, Hubei, Yunnan, Guangxi, Guangdong, Jiangxi, Guizhou and Fujian in China. 

Vine tea has the effects of clearing heat and detoxification,

reducing summer heat and generating fluid, dispelling wind- dampness,

diminishing inflammation and diuresis, protecting liver and relieving alcohol. 

The extracts of vine tea in this evaluation are dihydromyricetin and myricetin.

dihydromyricetin is pure white acicular crys

myricetin is lime green crystalline powder

The source of raw materials is Hunan, China

For vine tea extract samples, we select 98% dihydromyricetin and 80% myricetin samples from company A and company B in Hunan as evaluation object.

The total cost of this evaluation: test cost 3550 yuan (public price) + sample cost 0 yuan (sponsored by sampling company) = total 3550 yuan

▽ Raw material test result

(visual shooting of raw material)

(Color may vary from device to device)

The raw materials are mostly its dry leaves mixed with vine tea

The details can be seen in the video above

The content of dihydromyricetin in raw materials is relatively high

Among the heavy metal content test items, arsenic(As), lead(Pb), mercury(Hg) and cadmium(Cd) are shown in the figure above

▽ Extract test result 

(visual video of 98% myricetin sample)

(visual video of 80% myricetin sample)

(Color may vary from device to device)

In the color comparison of dihydromyricetin,

the color of sample A1 is beige while that of sample B1 is grayish white

The color of myricetin is lime green as a whole and the color of sample B2 is yellow

In terms of active ingredient content, the myricetin content of sample A2 did not reach the calibration value (80%)

(data for reference only)

As for heavy metal detection, the data of the samples are as shown above (extraction method has a certain effect on the heavy metal content)

In terms of solvent residue, methanol is not detected in all four samples, and the residual value of ethanol is shown in the figure above

▽ Addition

The vine is also tea excluding theophylline and caffeine

It is rich in 17 essential amino acids and 14 trace elements

It is the plant with the highest natural selenium and flavonoids found. Besides, it is a valuable pure natural green drink for food and medicine in China with very strong health care and medicinal value. 

For thousands of years, it has been regarded as fairy grass in ethnic minority areas such as Hunan, Hubei and Guizhou

Chinese culture is broad and profound, and drinking cannot be avoided in worldly wisdom. Drinking vine tea slowly after alcohol can help protect the liver and sober up (It is recommended to make tea at 80 ℃)

Vine tea /Ampelopsis grossedentata (Source from network)

 The above is the contents of NO. 2 Plant Extraction Evaluation

Note: The content of this article is original to Delore Group, the copyright of which belongs to Delore Group (stolen pictures must be investigated), part of the content from the network provided, reference to the content has been marked with the source disclaimer.

①The plant extract review section only tests raw material samples and product samples, and does not make objective conclusions

②Some samples may have different test results due to special reasons, the test results are for reference only.

Next:2021 Plant Extracts Review Issue 1 Prev:2021 Phase III for evaluation of plant extract