What is too little carbs?

     Hi,

I was just wondering how many carbs i need, i weigh 108 pounds iam 5'3" and iam 14 years old. How many carbs do u guys eat? and how many do u think i would need.

                                                                             Thanks:)

for what?

Enough to prevent ketones.

My answer wasn't very clear so let me try again. I think one needs a certain amount of carbohydrates each day so one doesn't produce ketones. Even if someone eats no carbohydrates they still require insulin and an excessively low carb diet can make one prone to ketones.

I believe that C would be a good one to answer this, or at least give you a ballpark answer - she's a dietician. :)

This would depend on your insulin regimen and dosing schedule.  You should have carbs at each meal and they should be of the complex type (think dairy, fruits, whole grains) to prevent rapid highs and lows.  

My physiology teacher said a person needs at least 50g per day, to prevent protein loss and have enough for optimum brain function.  

The number is actually 130g of carb every day. For some that seems like a lot, so we say no less than 100g. If you aim for 45-60g of carb at each meal, you'll easily meet that. If you include snacks, you're well past the minimum, which keeps you safe from ketones.