Sample: Dissolve 1 g of cranberry juice powder and 1 g of cranberry raw material in 10 mL of methanol, respectively for 30 minute. After standing for 5 minutes,the mixture is filtered. The filter is washed with 1 mL methanol.
Ursolic acid and alpha arbutin are different active ingredients. There are certain differences in their efficacy. So everyone must choose based on their own actual situation.
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Do you or your customers use Chondroitin sulfate (Bovine)? Its purity is usually 90%. Its test stanards are 100% USP and partial USP. Its raw materials are 100% bovine and ratio bovine. And its prices are different based on the difference above.