Reading Time: 9 minutes Welcome back! or maybe just welcome if you are here for the first time. In the final part of the series “Why do we eat and how to do it right?”, we will learn about Protein, its functions in the human body, optimal sources of protein, how much do we need, and finally how the food we eat affects our mood. We will end with the series takeaway message. So let’s dive right into it! Protein as a Macronutrient Protein provides 4 calories per gram and is composed of “amino acids”. Amino Acids are organic compounds made of carbon, hydrogen, nitrogen, oxygen or sulfur, and are…