Developing countries are witnessing a nutritional and economic transformation marked by a shift from plant-based protein to animalbased protein consumption. This transition, driven primarily by rising incomes, carries significant environmental and sustainability implications. While it is widely recognized that the growing consumption of animal-based protein is unsustainable and detrimental to natural ecosystems, climate stability, and resource usage, the choice of animal protein source is influenced by a complex interplay of factors including governmental policies, cultural norms, and religious beliefs. This paper delves into the challenges posed by the increasing production and consumption of animal-based proteins, emphasizing their adverse environmental impact. The production of animal proteins demands more resources, such as freshwater and energy, per gram compared to plantbased proteins. Moreover, it results in higher greenhouse gas emissions, exacerbating global warming and climate change concerns. In contrast, developed countries are now promoting a reverse protein transition: a shift from animal proteins to plant proteins. This paper sheds light on this emerging trend, highlighting its potential to mitigate the environmental consequences associated with protein production and consumption.