Not a MD, don't have PCOS
Anyways, on rides I do best with a mix of protein and carbs. Subway brand sandwiches are a perfect blend, just don't eat all the sandwich at once. No veggies or roughage except olives on the sandwich, the time for that stuff is off the bike. Or, leftover steak rolled up in a tortilla is *****in'. Energy bars are a waste of time for me, I don't digest soy very well so feel no energy when I eat one. And (shudder) no bananas on the ride, I am "sensitive" so they give me the gastric symptoms described by other riders.
I love the shot blocks, I get the margarita ones with extra salt, or the orange with caffeine, when I can find them.
Where are you doing ur Century??
I'm trying to get to Wichita Falls next weekend for my century, Hotter'n'Hell!! While I don't have any medical issues (diagnosed anyways) It will be my first and I am nervous. Since it is the same date you posted, I was just wondering if it is the same ride.
In any case, listen to your body!! It will tell you when you've had enough. Take a lot of breaks and be safe. Most important, HAVE FUN!!!!