As the population of older adults increases, so will the need for both human and robot care providers. While traditional practices involve hiring human caregivers to serve meals and attend to basic needs, older adults often require continuous companionship and health monitoring. However, hiring human caregivers for this job costs a lot of money. However, using a robot like Nao could be cheaper and still helpful. This study explores the integration of humanoid robots, particularly Nao, in health monitoring and caregiving for older adults. Using a mixed-methods approach with a within-subject factorial design, we investigated the effectiveness of nonverbal communication modalities, including touch, gestures, and LED patterns, in enhancing human-robot interactions. Our results indicate that Nao's touch-based health monitoring was well-received by participants, with positive ratings across various dimensions. LED patterns were perceived as more effective and accurate compared to hand and head gestures. Moreover, longer interactions were associated with higher trust levels and perceived empathy, highlighting the importance of prolonged engagement in fostering trust in human-robot interactions. Despite limitations, our study contributes valuable insights into the potential of humanoid robots to improve health monitoring and caregiving for older adults.