I've heard using 3 or 4 is better than 2 because their longevity is greater than 2. I this safe and acceptable practice?
I am unsure what your question is.... in the U.S. there is Juvederm Ultra and Juvederm Ultra Plus. The difference doesn't have to do with the longevity of the product, but the bond of the particle size. I would NEVER put 3 or 4 syringes of either of these into someone's lips. Not ever.
