Is Lipofilling Cream Safe?

I am 19 years old and very thing I have 20 KG underweight . my face seem dropped into my face and it seem that I have no cheek and . doctor suggest me 'Lierac LIPOFILLING' and told me it might you do not restore your face fat if you gain weight. is it safe to use this cream and does it volume my face about 5 - 8 milliliter ?

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