A National University of Lesotho (NUL) Biotechnology student, Thapelo Lekhotla, has uncovered the hidden chemical, microbial, and heavy metal profiles of Lesotho’s wild rosehip fruit, validating its health benefits while highlighting important safety considerations for consumers and producers.
In an interview with theReporter, Thapelo Lekhotla, under the supervision of Professor Sibusisiwe Magama and other co-supervisors, detailed his extensive analysis of rosehip’s fruit, seeds, and husks.
The study aimed to provide scientific backing for the widely consumed local plant, used in teas, jams, juices, and oils.
Lekhotla collected fresh rosehip fruits from the mountains, which were then cleaned, dried, and separated into their distinct components. Each part was subsequently ground into a fine powder for rigorous testing.
Qualitative phytochemical analysis revealed a rich array of beneficial compounds. The fruits were found to contain terpenoids, known for immune-boosting properties, along with flavonoids and polyphenols, which act as antioxidants and anti-inflammatory agents.
Additionally, anthraquinones and phlobatannins, linked to digestion and inflammation control, were present, as were saponins and quinones, which aid in fighting infections and balancing cholesterol.
However, Lekhotla’s research also addressed potential safety concerns.
Microbial plating tests indicated that the rosehip fruits harboured the highest counts of bacteria and fungi, followed by the husks, with seeds showing the least. This finding underscores the importance of thorough cleaning and proper drying of rosehip fruits before consumption or processing to mitigate microbial contamination.
Furthermore, Lekhotla utilised a Flame Atomic Absorption Spectrometer to analyse heavy metal content. The husks demonstrated the highest metal concentration, particularly potassium and iron, while fruits contained moderate levels and seeds the lowest. Fortunately, the detected metal levels were largely within safe limits for human consumption, providing crucial data for commercial producers.
“Rosehip is an amazing plant. But people deserve to know exactly what’s in it – the good stuff and the risks – so they can use it properly,” Lekhotla stated, emphasizing the importance of informed use.
This comprehensive research offers valuable insights for Lesotho’s agricultural sector and local businesses, enabling the development of science-backed rosehip products.
For the general public, the study provides assurance regarding rosehip’s health benefits, coupled with essential guidance for safe preparation.
