How long does it really last when ha is injected under the eyes, under the muscle? Some says it last 6 months, 1 yr, 2 yr, others "at least 3 years" ? Why such a difference? Also i've read somewhere that in this area, hyaluronidase is not produced by the body so ha does not break down. is it true? Also I've read lots of horror stories where people say they still have their ha bags years after the injection. Maybe in this case, it is because ha is placed too superficially. What do you thk?
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