The key to a ketogenic diet is to keep carbohydrate intake low enough to avoid triggering insulin secretion, whatever that level may be. On these forums, we suggest under 20 grams a day, because itâs a level that will put anyone into ketosis, but some people can handle a lot more carbohydrate and still remain ketotic. I suggest asking your daughter to start low, just in case, and she can always increase her carb intake if doing so doesnât bring back her symptoms. You might reassure her that the minimum daily requirement of carbohydrate is zero grams. But she may find it hard to go without her favorite sugars or starches (however, if sheâs highly motivated and wants to go whole hog, you can tell her that the cravings do abate, eventually).
As a growing teenager, she needs a lot more protein than a mature adult does, so ignore the maximum protein recommendations on these forums, where sheâs concerned. And then encourage her to eat fat to satiety. If sheâs afraid of fat, we can go into the science of it, but you can tell her right off the bat that the notion that fat is bad for us is not backed up by any science. By eating fat to satiety (not to a full belly!), she can be sure her body is getting all the energy it needs without stimulating the insulin production that is so harmful.
You might also see if her doctor is willing to prescribe an HbA1C test, to get an idea where she stands as far as metabolic disease is concerned. A lot of young people these days are well on their way to metabolic disorders without even realizing it. Your daughter is very lucky, in the sense that she has an idea something is not right, and some idea also of what to do about it. Good luck to both of you, and please keep us posted. 