Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating...

https://writehollow.com/s/4-_t2SAaAIsqqfX26t_f2

Ultherapy uses focused ultrasound targeting the 4.5 mm SMAS layer, stimulating collagen deep beneath the skin. Results build gradually, peaking around 3 to 6 months. Compared to RF, which heats tissue to 40–45°C, Ultherapy reaches deeper layers