Ingredients: Water, L-Ascorbic Acid, Zinc Sulfate, Sodium Hyaluronate, Bioflavonoids, Phenoxyethanol

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Let me try

L-Ascorbic Acid: from wholefood store, make it into 5% (fresh made)

Sodium Hyaluronate: we already have it, 就是透明质酸，we can control its conc. into around 1.5&

Zinc Sulfate: can get it from drugstore from nutrient supplement, control its conc. to 2-3%

Bioflavonoids: 就是很火的 vitamin P, we can get it from vitamin world or amazon or anywhere, control its conc. to around 1%

Phenoxyethanol: is a preservative. 防腐剂, its chemical name is 苯氧乙醇（refer to 牛耳爱美书1副录）。it is not necessary and could be replaced by similar preservatives， control its conc. under 1%, around 0.5%.

看来这个配方还有点意思。这个成本真的很低。we can make stock solutions with all the gradients except L-Ascorbic Acid, and add it fresh every time we use.

It is totally possible to make it, in my understanding, and in fairly low cost.