September 13th, 2017 by

The essentials you need to know about Resveratrol…

Sure, we have all heard about Resveratrol and that it’s a great antioxidant, but what do you really need to know about this product to help compliment your brands and improve your leverage as a buyer?

Resveratrol is a natural compound found in red grape skin, polygonum cuspidatum, and some other berries. It is a powerful antioxidant produced by some plants to protect them against environmental stresses. For buyers of Resveratrol traceability and full security over the supply chain is the top priority when procuring this material. Dongming Growth is considered by many to be highly trusted because of its transparency and traceability from farm to final product.

Dongming Growth’s global supply available is over 100MT, about 20% of which comes from their 5000mu of farmland devoted specifically to Resveratrol farming. It is also important to note that unlike many other Chinese herbal manufacturer, Growth focuses only on the production of Resveratrol and does not produce any other botanical or other types of ingredients.

Other Key Notes About Dongming Growth:

  • Complete traceability and control from farm to finished product
  • FDA GRAS certified
  • Fully Audited Facility
  • Lowest emodin content in industry
  • Carrier-Free Granular, Powder and Fine Powder options for various formulas

Currently, most resveratrol raw material is wild crafted, and a small amount is currently farmed. Under normal conditions it harvests all year long, but considering the growing season and weather, September through October is considered to be the best time of year to harvest. To ensure a constant and reliable supply of material, buyers should look to purchase from manufactures who will harvest from both wild crafted and farmed raw material. Dongming Growth has a well-balanced supply from both wild cultivated and their wholly owned farm of raw polygonum cuspidatum.

Milk Thistle Extract

March 14th, 2017 by

The essentials you need to know about Milk Thistle Extract…

Sure we have all heard about Milk Thistle Extract and that it is great antioxidant, but what do you really know about this product and how can it help your brands and fit into your products.

Generally speaking, the main source of Silybum marianum(L.) Gaertn is cultivated in Northeast of China and Inner Mongolia.

Nowadays, Inner Mongolia and Hei Long Jiang are the main cultivation areas, Inner Mongolia occupies around 80% of the plant area (300,000mu), and Hei Long Jiang occupies around 20% (75,000mu).

Cultivation season: Early May
Harvest season: Aug to Sept

Each year Milk thistle factories can predict the price for next year around July to Aug due to the status of the milk thistle seeds crop. In recent years, the supply of milk thistle seed has been stable and even a bit over supplied.

So now we know where Milk Thistle is grown and the important seasons for the raw material but how do we get to the usable active material?

Manufacturers can use three different solvents in the process of extracting the viable Silymarin from the raw material. Each solvent type can affect the pricing of the Milk Thistle Extract.


The most commonly used extraction solvent for Silymarin is Acetone. This method is the most cost effective option for extraction and thusly provides the most competitive prices in the market, which in turn has made it the most popular type of material on the market.

Ethyl Acetate:

For parts of Europe the Ethyl Acetate extracted Silymarin is preferred. The price of Ethyl Acetate extracted Silymarin is higher than Acetone extracted material but lower than Ethanol extracted material.


Silymarin is a naturally occurring polyphenolic antioxidant flavonoid. This active ingredient is only soluble in alcohol and not water, thus making an alcohol extract the preferred medium of extraction, but the material from Ethanol extraction is generally the highest priced in the market. This material is mainly sold in Japan, though due to higher demand for cleaner products we may see an increase in demand for Ethanol extracted material in the near future.

Name Main Ingredient and Assay

Test Method

Silmarin (Milk Thistle P.E.)
Extracted by Acetone
UV 80% Silybin + Isosilybin  20% HCLC, UV
Silmarin (Milk Thistle P.E.)
Extracted by Acetone
UV 80% Silybin + Isosilybin  30% HCLC, UV
Silmarin (Milk Thistle P.E.)
Extracted by Ethanol
UV 80% Silybin + Isosilybin  30% HCLC, UV
Silmarin (Milk Thistle P.E.)
Extracted by Ethyl Acetate
UV 80% Silybin + Isosilybin  30% HCLC, UV

What you should know about the most common grades of Silymarin…

UV 80% Silymarin

  • Appeared more prominently in the market in recent years.
  • This is usually the remaining material leftover after silybin extraction for pharmaceutical use.
  • This material can be very easy to adulterate.
    • You can use HPLC to identify quality material, milk thistle has 6 main contents, and if any additional peaks appear there may be adulteration.
  • Low silybin content
  • Price is low

UV 80% Silymarin, 40%, 45%, 50% silymarin by HPLC, 25%, 30% Silybin+Isosilybin

  • These are the traditional grades.
  • Naturally extracted.
  • It is easy to avoid adulteration by using HPLC to test the contents of Silymarin and Silybin+Isosilybin.
  • Higher Silybin and Isosilybin content

What are the most common uses of Milk Thistle Extract?

Milk Thistle Extract is now most commonly used in Liver Health Products. The Sylmarin market has seen a large increase of use in Detox products, Sports Nutrition products and Women’s Health products, in recent years. The inclusion of Slymarin in the formulation of products has been focused around the prevention and treatment for disorders of the liver, prostate, bile ducts, and gallbladder.

What to know even more?

For a detailed analysis on this market please download our exclusive Milk Thistle Extract Trend Report