I have the very same symptoms and these are the things that I found out. First of all, I could never work out why I came down with insulin problems. For many years (a decade or two) I gave up sugar and kept to a very good diet, but then all of a sudden I started having these problems. However, later I was able to trace it all back to a period of my life when I suffered a lot of stress – very intensive for almost a year. And I found out that excessive cortisol (from stress) causes insulin problems and weight gain. This is just one article I quickly found to explain it:
https://idmprogram.com/closer-look-cortisol-hormonal-obesity-xxxx/
When I start to lose weight now, my body goes through all those symptoms that HypoGal explained above. Its almost unbearable. Yes, Riboflavin, I too thought the 800 calories may be too low for people like us with reactive hypoglycaemia/insulin resistance, because the body seems to go crazy and panics, and then the adrenalines and cortisol kicks in, and this appears to cause all the symptoms. I eventually increased that to 1,000 to 1,200/day and was able to stick with it for a month and lost 4 kilos (about 9 or 10 lbs), but it was tough going. Really tough.
However, now I am focusing on reducing the cortisol in my body. Eliminating as much stress as possible from my life, and replacing it with rest, music, mild exercise (walking) – and body mindfulness meditation.**
Riboflavin, a couple of other things came to mind when I was reading your post. Have you tried Progesterone Cream? This can be very calming, promotes relaxation and helps balance other hormones.
Also, there are certain times of the day when our insulin levels are at their lowest: around 3.00am, 3.00pm and in the evenings starting around 7 to 8pm. This is usually the time when our brains signal to our bodies that there is not enough insulin coming to the brain and can set off all the symptoms. I am finding that its best not to exercise, or even watch action or stressful things on TV at that time. But to just rest and meditate and listen to relaxation music. Also, I find that eating cheese (small amounts) is comforting to the body, often relieves the stress, and is a ‘good’ substitute for the sugar/carbs that the body usually craves around that time. I try and avoid large meals when insulin levels are naturally low. The body just can’t seem to handle it. I guess it just doesn’t have enough insulin to digest the food and then starts to panic again. Remember its your body (the brain sending signals) that is panicking, not you. So stay calm and try to be detached from it as much as possible. I find that helps.
** A good resource I have found for mindfulness meditation are some old podcasts found on iTunes called ‘ZenCast’. I think they also have a website. The ones to download are Zencasts 147 through to 152, which covers 6 weeks of the Mindfulness Meditation Course by Gil Fronsdal.
I hope this helps ! And would also like to have more discussion from others about this as well.
Best regards to all 🙂