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Hello, I would like to know how many percentages of natural extracts should be put in the serum? For example, how many percent of cordyceps should be put in serum? Then the calculation assumes that the extract is used 3% mixed with a formula weighing 30 grams of serum. That is, take 0.9 grams of ext...

Hello, I would like to inquire about making a serum. I will make a serum from Cordyceps extract. The substances to be put are 1. Cordyceps extract 2. Vitamin B3 3. Double Hyaluron ic acid 4. Zinc PCA 5. Hydroxyl ethyl cellulose (build serum) 6. กลีเซอรีน ( สารกันเสีย )Is there a way to mix thoroughl...