Could This Drought-Resistant Shrub Revolutionize Our Future Food?

Researchers at RMIT University are exploring Old Man Saltbush as a new, sustainable food source. This drought-resistant shrub, once used mainly for livestock feed, could soon appear on dinner plates. Early findings suggest it offers high-quality protein and essential nutrients missing in many staple foods.

Old Man Saltbush, known scientifically as Atriplex nummularia, thrives in dry conditions with minimal water. Traditionally fed to animals, it is now being tested for human use due to its rich nutritional profile. The plant contains protein levels that rival or exceed soy, pea, and rice, making it a strong alternative for plant-based diets.

When ground into powder and mixed with wheat flour, saltbush significantly boosts nutritional value. Tests showed that adding it to noodles doubled the protein content and increased dietary fibre eightfold. A single serving of saltbush-enriched pasta provides nearly half the daily protein requirement for an adult.

Beyond protein, the shrub delivers essential amino acids like lysine and tryptophan, which are often lacking in wheat-based foods. It also contains higher fat levels than standard plant flours, improving the texture of processed foods. Rich in minerals such as calcium, iron, and zinc, it helps meet micronutrient needs more effectively than many common crops.

The research team plans to work with farmers and industry partners to refine growing methods and build a stable supply chain. Future studies will examine long-term health effects, including gut health, as well as consumer reactions and large-scale production challenges.

Saltbush could offer a practical solution for improving food nutrition while using fewer resources. Its high protein, fibre, and mineral content make it a valuable addition to everyday meals. Further trials will determine how easily it can be grown, processed, and accepted by consumers worldwide.