I am 73 and I am also experiencing insomnia at night. I will take a Tylenol PM to get to sleep, but often, it doesn’t help me. I get up and end up reading and after an hour or so, my eyes get tired and I can go to sleep. In the afternoon, like you, I get so tired but I don’t want to take a nap because then, I will definitely not sleep at night. By the time I get to sleep, so late at night, I have a hard time waking up in the morning. I think that this probably just goes with aging (sorry to even say that!). It’s difficult!!!

Hi. I’m 74 and have had extreme fatigue after breakfast and lunch for nearly a year. This stopped immediately when I finally cut back on protein. There was a big difference for me going from around 20 grams of protein to just 10 grams sourced from plants or animals. I still need to rest for about an hour in the afternoon, but I don’t sleep and I am happy to be tired when I start getting ready for bed at 8 PM.
Excess protein evidently turns into sugar, which turns me into a sloth. We are told how important protein is for older people, especially when we are healing from an injury, which I am, but my latest ex ray shows progress. Our focus on protein backfires if our body doesn’t use it fairly quickly. I’ve had a life long interest in nutrition, but I only know what I’ve read and experienced myself. Take a look at your protein intake and try adjusting it down by replacing it with some heart healthy fats. Best wishes.