It often finishes in one session, but when there is a lot of filler or it has hardened over time, it is done across several. Dissolving becomes visible within a few hours to three days, which is how long the enzyme takes to break the hyaluronic acid apart. Judge the result after the swelling has gone.

It does not dissolve only the filler — your own hyaluronic acid can be reduced too, because the enzyme cannot tell the two apart. Your body keeps producing its own, though, so it recovers within days, and injecting only as much as needed, in stages, is the safer approach.

It dissolves only hyaluronic acid filler. Collagen-stimulating products and calcium-based ones have a different composition and are not broken down by this enzyme. That is why it matters to know which product is being used before it goes in, and reversibility is sometimes itself the criterion for choosing.