The Potential of Roselle as Health Supplement: Extraction, Phytochemicals and Future Perspective

Roselle (Hibiscus sabdariffa) is a native plant in Malaysia and it is often reported on its nutritional and medicinal values. To date, numerous studies have been conducted on roselle, both calyx and seed, and it is proven that the major bioactive compounds in calyx are ascorbic acid and anthocyanin, whereas the seed is rich in carbohydrates, proteins and unsaturated fatty acids, which are a good source of minerals and antioxidants. The utilization of roselle is commonly noticeable in food, cosmetic and personal care industries. It is interesting to note that the constituents present in roselle calyx and seed extract, which are anthocyanin, fatty acids and tocopherol, make it possible to be exploited in the pharmaceutical industry. Thus, this paper discusses the potential of roselle extract to be used as a health supplement, by reviewing its extraction methods, selected phytochemicals and also its future perspective in the pharmaceutical industry.