Can I tighten and recover skin elasticity with exercise and vitamins? Dryness and blotchiness is gone.

Hi! I am male 24 years old due to some issues my face got extremely bloated and dry which had damaged my skin badly, it's saggy, weak, lost volume and had extremely defined wrinkles around my mouth. i went to a dermatologist and he recommended hifo and skin prp after two sessions of prp and a hifo my skin has gotten a bit better but the saggyness is there And there is something around my mouth I don't know if it is muscles of my cheeks hanging or fat?.

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