What is Hyaluronic Acid?
Chemically, Hyaluronic Acid is a humectant that draws water into the skin. A water-binding humectant rated 0/5, non-comedogenic and fungal-acne safe.
You may see it on labels as Hyaluronic Acid, Sodium Hyaluronate Crosspolymer, so it can hide under more than one name in an ingredient list.
Where Hyaluronic Acid shows up
Hyaluronic Acid is commonly formulated into serums, toners, and moisturisers of every kind. Separately from clogging, its irritancy is rated 0/5 — low, so it's unlikely to sting or sensitise on its own.
Is Hyaluronic Acid bad for acne-prone skin?
That low score makes Hyaluronic Acid a reasonable choice even for acne-prone skin. As always, individual reactions vary, but it is not a likely cause of clogged pores.