The integration of the Internet of Things (IoT) into the realm of sports nutrition has ushered in a transformative era in athlete health and performance optimization. This comprehensive review explores the multifaceted role of IoT technologies in sports nutrition, emphasizing their impact on personalized nutrition plans, performance enhancement, and the ethical considerations surrounding their implementation. IoT devices enable real-time data collection of biometric, dietary, and activity-related information, facilitating the creation of tailored nutrition plans. Machine learning algorithms further enhance dietary recommendations based on historical data and athlete-specific goals. Several successful personalized nutrition programs serve as testaments to the efficacy of IoT in enhancing athlete well-being and performance. Moreover, IoT-driven continuous monitoring and data-driven decision-making play pivotal roles in optimizing athletic performance, injury prevention, and recovery management. However, challenges such as data privacy and security, consent, and data ethics necessitate careful consideration. In navigating this new paradigm, athletes, coaches, and nutritionists must harness the potential of IoT while upholding ethical standards to ensure holistic athlete care in the digital age.