Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound energy,...
https://yenkee-wiki.win/index.php/What_Age_Is_Best_for_RF_Tightening%3F_Focus_on_Your_30s_to_Early_40s
Ultherapy targets the deep 4.5 mm SMAS layer using ultrasound energy, stimulating collagen over 3 to 6 months for gradual lifting. Compared to RF, which heats skin to 40-45°C mainly for surface tightening, Ultherapy offers deeper lift