23 kinds of blood components have been studied for 5 years and no side-effect has been reported.
The safety of an ultrasound depends on its frequency and intensity.
FDA (USA) ultrasound safety level is based on Thermal Index (TI = 2) and Mechanical Index (MI = 0,3).
NARL ultrasound is far below these limits and is proven to be safe (TI = 0,3 and MI = 0,08).