India, April 28 -- Feeling post-lunch fatigue or a dip in your energy levels in the afternoon could be an indication that you aren't eating a nourishing meal and might be eating a diet high in refined carbohydrates and sugar. Studies also indicate a hormonal shift in our body after eating, as it leads to the release of various hormones and neurotransmitters that activate parts of the nervous system responsible for digestion. This can lower our energy levels and make us feel sleepy....