What do you eat when you feel faint and shakey?

There are several different causes for this, and I agree that you should visit your dr about it. I have suffered with fainting for years and even caused myself damage from passing out (broken my teeth etc).

A very common case is low blood pressure, which is worse when you've been standing for too long and not had enough to drink, this can cause vasovagal syncope which is a fancy way of saying fainting. What stops it is to get low down or lie down. Before you get to the faint you get a surge of symptoms such as dizziness, shaking, sometimes sweating. This will ONLY ever happen when you are stood in the upright position. This is the type I get and when I start feeling the signs of a faint coming on I find a place to sit and drink water, it usually resolves itself.

Another common cause in women, especially blood donors is anaemia, and this is most likely if you have been more sympotmatic since giving blood. If you see the Dr then they will do an iron screen that will not only look at your haemoglobin levels but also other factors such as your ferretin (iron stores) and things like your folate and vitamin B12. If you are suffering with anaemic type symptoms you will feel tired and out of breath more easily as well as the occasional feeling of faint.

Hypoglycaemia is not that common you can get reactive hyopglycaemia as mentioned, which would come on after eating something, and the dr will be able to test for this.

i got all these blood tests done and an ECG to rule out cardiac causes, perhaps you should do the same, but really see what your dr says.

Yes, if this happens often I would suggest seeing a Dr. This happens to me seldomly as well. All of a sudden it will hit me, (i'm not hungry either) I get shaky, feel sweaty, and weak. I do eat something even though i dont think I am hungry. I am not sure what causes it. I too eat whatever is closest to me and drink water. It very seldom happens to me, so I haven't seen a doctor. But, if it happened more often, I wouldn't chance it. Might as well get seen

I have this problem due to hypoglycemia. I used to carry around fun size candy, but now my go-to fix is Chocolate Zico Water. Even just 1/2 of the bottle is a terrific boost - it's a coconut water, TONS of potassium, and all natural!! Boosts that blood sugar right back up! That said, I do try to eat protein at every meal and eat at least 2 servings of fruit to keep my blood sugar up during the day, but when I start feeling faintness coming on, I always grab a zico!

Go to a doctor to see if you hypoglycemc (think I spelled it right).

If you are struggling with protein start incorporating greek yogurt, fat free cottage cheese, quinoa, beans, whey powder, nuts and nut butters into your diet. Those are all healthy sources of protein

Get your blood sugars checked

Sometimes I have to confess that I will end up drinking a can of full fat coke. I actually truly despise full fat coke but it's the only thing sometimes that will stop me from fainting.

Although I do have lucozade glucose tablets which I try first.

I have both hypoglycemia and iron deficiency anemia so I have had lots of episodes like that. I have found though that if I eat something really sugary when that happens, the rapid jump in my blood sugar will make me really sick as well. I drink some milk, eat something with peanut butter on it (something with substance). It usually happens when I'm not eating enough or eating regularly.

I used to feel light-headed, dizzy, and like i was going to faint when I exercised early in the day- even if it was very light exercise like commuting a few miles by bike, or mowing the lawn. I tried eating different things for breakfast, eating at a different interval before exercise etc.

For me it was that I needed more water. I was drinking my 8 glasses (80-100oz) every day and thinking I was doing fine. For some reason I need massive amounts of water to really feel my best and energized during exercise. About a year and a half ago I started pushing for 4-5 liters (135-170ish oz) daily I don't ever feel lightheaded or dizzy during a workout. If nothing else is working you can always try more water

I eat a slice of bread usually because it is the fastest thing I can find. I also keep ensure drinks/protein bars on hand.

I know if you go to the store there are glucose shots which should be helpful when it comes to low blood sugar which sounds like what you are describing.