Does co2 lazer works for reducing pore size?

Pore size can't be reduced, you can only reduce their appearance by controlling sebum production and clearing blackheads/clogged pores. I understand that the laser may work but it's much cheaper and simpler to use salicylic acid.

Your pores are the size they are. It’s no reducing them. You can just reduce the appearance but exfolating 2-3x a week, double cleansing and using niacinamide or salicylic acid to make sure your pores are unclogged which can give the appearance of them being smaller. No procedure or the number of sessions will reduce pore size

I am not sure about CO2 laser but yes certain types of lasers are able to shrink and reshape your pore size. Laser are amazing, depending on type, it can do so much for the skin. I think my clinic said up to 40% reduction in pore size. I could be wrong. You would need a few session, like 5-7? the last time I had CO2 laser on my face was more than a decade ago. You need like 6 sessions to do so. While my other laser treatment was used to removed skin tags on my neck I think for the current tech you would need to consult with a dermatologist to see your options with them. They might even include skin care too. As amazing as they are, these are quite expensive and again the results is much faster than skin care but you have to be realistic with the results Pores are genetically detemined and the pictures you see are just good lighting, makeup and camera. Pores are normal.