If you get dizziness when you stand up quickly that's called isostatic hypotension and can be caused by the water loss and flushing out of mineral salts that happen initially on a low carb diet. You can fix this with bone broth or with supplements of magnesium, potassium and table salt.
I often feel odd when I consume coconut products (oil, whole coconut, milk, shreds etc). Kind of strangely dizzy in an unpleasant way. I keep my coconut to a minimum to keep that under control.
Female, 5'3", 49, Starting weight: 163lbs. Current weight: 135 (more or less).
Starting squat: 45lbs. Current squat: 160 x 2