Biomedical industry is in continuous growth in the last decade. Low profile compact tunable antennas are crucial in the development of wearable human biomedical systems. The antenna resonant frequency may be tuned by using a varactor to compensate variations in antenna resonant frequency at different locations on the human body. Design considerations, computed and measured results of wideband printed antennas with high efficiency on the human body at UHF frequencies are presented in this paper. The proposed antenna may be used in Medicare systems.