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What is he doing?

For non-invasive skincare he does daily face-wash, moisturizing creams (face and body), application of creams containing Vitamin C, E, B3 and more. Personally, it is enough to apply some moisturizer (for face and body) and UV-protective cream. If you want really smooth/clean face then you can look into getting some retinol/retinoid - the stronger the better the effect as long as your skin can tolerate (so requires experimentation). Stick to proven brands such as Cerave, Eucerin and few other big ones.

For more invasive procedures he does microneedle and laser procedures. Both operate on principle of basically causing controlled damage on the skin to force your body to repair it. I used to have some stretch marks that were repaired using CO2 laser. Before trying to do any of this - consult your local dermatologist if you have something that bothers you on the skin, however. These procedures can be costly, requires after-care and obviously should be performed by certified professionals.

He also does microbotox injections to clear any pores. In my opinion this is now veering off more to cosmetic enhancement with fillers and the like.