Stuck in a protein rut? When it comes to met and fish as a protein source, it’s always good to vary it throughout the week. Different sources of protein contain different essential vitamins and nutrients. Red meat is rich in vitamin B12 and iron whereas fish is high in omega 3 fatty acids. The photo above shows how different protein sources stack up against each other and can help you think about including a meat or fish that you wouldn’t usually choose in your meals for this week.