Key Takeaways
- Old Man Saltbush is highly nutritious, boasting high protein and fiber content while functioning as a natural salt replacer.
- Research indicates that saltbush can help address dietary deficiencies in minerals and fiber, promoting better health outcomes.
- This climate-resilient plant has potential for broader food applications, enhancing sustainability in food production.
Research Insights on Old Man Saltbush
Food scientists at RMIT University have identified the native plant ‘Old Man Saltbush’ (Atriplex nummularia) as an underutilized superfood traditionally consumed by Indigenous Australians. The research, led by Dr Mahsa Majzoobi, highlights its remarkable nutrient density, offering a sustainable alternative for modern diets.
In their studies, the researchers evaluated the addition of saltbush powder to wheat flour noodles at varying concentrations. They discovered that saltbush powder contains over double the protein content of standard wheat pasta and is eight times richer in dietary fiber. Comprising 20-25% protein, its amino acid quality aligns closely with human nutritional needs, making it a viable substitute for animal proteins.
Globally, fiber deficiency poses significant health risks, contributing to conditions like obesity and diabetes. Saltbush’s high mineral content, including calcium, iron, and zinc, addresses deficiencies that affect even developed nations such as Australia. Additionally, the plant’s rich bioactive compounds and antioxidants support overall health.
The research emphasizes the importance of reducing sodium intake due to its link to high blood pressure and cardiovascular diseases. Saltbush’s natural composition allows it to act as a salt replacer, offering a healthier option to enhance flavor without the adverse health effects linked to sodium chloride. In practical tests, noodles containing 5% saltbush powder had a sodium content of about 140mg per 100g, which, although exceeding the low-sodium classification, demonstrates the product’s potential without added salt.
Sustainability is another key aspect of saltbush, a halophytic plant able to thrive in challenging climates. With increasing drought conditions, incorporating such resilient crops is vital for establishing a stable food supply. Dr Majzoobi noted the challenges of cultivating more common grains like wheat and rice, which require specific conditions and substantial water resources.
Looking ahead, RMIT plans further research into saltbush applications in various food products, including breads and snacks. The overarching goal is to develop Australian-grown, climate-resilient ingredients that contribute to healthier and more sustainable food systems, reflecting a commitment to addressing contemporary dietary challenges while supporting environmental resilience. The research received funding from RMIT’s Vice Chancellor’s Senior Research Fellowship and the Enabling Impact Platform for Sustainable Technologies and Systems.
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