Really, then why were the elites in the NYC Marathon reportedly taking gels every 2 miles and why did Simon Bairu "bonk", fall down, and have to receive medical attention because he didn't take any gels.

http://www.thestar.com/article/888282--feschuk-bairu-hungry-for-marathon-success

The sugars in energy gels can be digested in less than 10 minutes.  What do you think they give diabetics who are hypoglycemic (low blood sugar)?  Glucose.  How long does it take for them to feel better.  Usually, less than 15 minutes.  Magic?  I don't think so.

does anybody have tips for a pre-diabetic on race fueling for a mara? i have been trying gels - they give me an intial lift for about a mile and then i crash.

I'm interested reading the answers on this thread, since this is something I need advice on, too.  I've run lots of 10-milers, 2 halves, and I'm training for my first marathon in march, and I think I'm kind of the picture of "what not to do" nutrition-wise.

I eat a big, carb and protien meal the night before a longer race (10 miles or half marathon) and drink plenty of water, and then carry water during the run.  I'd never eaten before or during a morning race because of stomach cramps, and always finished ok.  (Half marathon right around 2 hours)  I noticed that my legs felt weak about 5 miles into my last half marathon, and though I pushed through I know my usual habits won't cut it for a marathon.

When I went for a 15-mile run last weekend, which was my longest ever, I mixed in drinking  gatorade with water throughout the run, and ate dole fruit bites, which had the benefit of being easy to eat while I ran, at about mile 10.

After reading this thread, I think I'll try the sport beans or Cliff Blocks on my next long run.  Thanks.

I'm new to running so I don't have a lot of experience with that but I can say is try eating PAYDAY peanut caramel bars, I eat them before I lift and run, its a big help and doesn't leave a heavy feeling in your gut.