Re: Intense vertigo...

Worried?-No Concerned and aware?-yes

You could be having hypoglycemic episodes you can help by taking a teaspoon of Maple syrup.
You could be dehydrated, drink more pure water with a pinch of Sea Salt added.
You could have an electrolyte imbalance, drink more lemonade and see if that helps.

Generally speaking you should not be doing strenuous exercise when fasting, or sweating excessively, this is what unbalances the body and it become low on essential minerals. If you have blackout spells or faint, then it is time to stop the fast and seek medical attention. When you experience vertigo lie down until it passes, drink more lemonade and stay quiet. If the vertigo continues after trying these simple remedies then you need to quit the fast, you are probably dealing with an electrolyte imbalance.

Real vertigo is rarely from detox, it more about chemical imbalance.