Large-scale investments in farmland can generate adverse effects on food security, minority groups, and the environment. Consequently, this Article analyzes to what extent international investment law has the potential to prevent those effects, considering the current investment treaty reform towards a symmetrical mechanism promoting sustainable development. First this Article presents the current substantive standard on expropriation of large-scale investments in farmland and the regulatory space left for host states. This Article then frames a potential public interest clause that would have the effect of granting due protection to investors and the right to regulate to host states, while not undermining the public interest and also preventing the adverse effects of these investments.