Spirulina is a freshwater blue-green microalgae which has been used as a food supplement for centuries. It is a rich source of several macro- and micro-nutrients. Several studies have demonstrated the potential nutraceutical, pharmaceutical and health benefits of Spirulina. The focus of this article is to highlight the multiple potential roles of Spirulina in human health. Studies have demonstrated Spirulina's roles in boosting immunity through increasing resistance to various infections. Potential health benefits of Spirulina in association with its antioxidant, antiviral and anti-inflammatory properties have also been reported. Owing to its nutrient profiles and nutraceutical properties, Spirulina has been shown to have potential therapeutic roles in metabolic diseases, hypertension, anaemia, and acquired immune deficiency syndrome