Wild Southern African fruits pack surprising nutritional power, study reveals

A new study from the University of Johannesburg has uncovered the nutritional benefits of 14 indigenous Southern African fruits. Several of these species were analysed for the first time, revealing high levels of essential amino acids. The research received support from the Agricultural Research Council and the National Research Foundation. The study examined the nutritional content of wild fruits, including well-known varieties like the marula, often used in food, medicine, and liqueurs. Among the findings, the Lowveld milkberry stood out as the best carbohydrate source, with 36.98 g per 100 g of fruit.

All 14 fruits contained lysine, an essential amino acid vital for immune function. Each exceeded the World Health Organisation’s recommended daily intake for adults. The jacket plum, in particular, had the highest lysine content and is noted for its ease of cultivation. Meanwhile, the white olive fruit was rich in histidine, isoleucine, leucine, phenylalanine, and valine, also surpassing WHO guidelines. The essential amino acids found in these fruits play a key role in child development and adult health. Researchers have called for further studies to assess the commercial potential of these wild fruits. The findings highlight their value as a natural source of critical nutrients.