What is Methylparaben?
Chemically, Methylparaben is a preservative. The most common paraben preservative, rated 0/5 for clogging.
Where Methylparaben shows up
Methylparaben is commonly formulated into the tail end of almost any water-containing product. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is Methylparaben bad for acne-prone skin?
That low score makes Methylparaben a reasonable choice even for acne-prone skin. As always, individual reactions vary, but it is not a likely cause of clogged pores.