What happens in the skin.
Pores don't "shrink". Their apparent size depends on their content: a full pore looks large, an empty pore looks small. The work consists of emptying and tightening, not shrinking a fixed anatomical structure.
Hydrafacial does exactly that in one session: mechanical extraction by suction, salicylic acid to dissolve the content, peptide infusion to tighten. Visible result as you leave. LaseMD goes further on surface texture by remodelling the tissue over 4 to 6 weeks.
A clean pore looks half the size. Before trying to shrink pores, you need to empty them.