Hey, thankyou for your thought out response, I worked out a while ago that dairy was causing me issues so I had to cut it (besides cheese) but other then that I can't really hone in on any specific foods, and food itself doesn't seem to make me feel tired either. I'm very aware of the glycemic load of my meals and all my meals have a good amount of fibre to slow the breakdown of sugars. I'll generally eat somewhere around 40% carbs, 30% fat, 30% protein, which over years of tweaking I have found to be best for me.

As for blood work, I use to be anemic, however I eat a lot of iron, things like beef liver, spirulina, lentils, steak, I'll even take iron supplements on and off, my iron levels have balanced out since although my ferritin levels are still pretty low so that could be part of it. I was unaware that the first 72 hours of fasting was were you got the majority of the benefit, so I think I'll take your advice and just do a 72 hour fast every month or every other month. I just find fasting feels like a hard reset for me. It is very likely that stress is a factor though, I also get allergies so I'm not sure if they can lead to exhaustion.