History: I've been doing Ironmans since 1999. I used to pay a lot of attention to nutrition, but lately I've been much more of a hobby triathlete than a serious athlete, and I'd just sorta wing it.

Signed up for some serious races this year (mostly ultrarunning and mountain biking, with an ironman thrown in for fun) And I'm trying to get back to a more 'real' fueling/hydration strategy, but just browsing through products - everything has changed so much!! I mean, it used to be you could use Powerbars and Gatorade. Then this new stuff, called 'Gu' came out. Seriously, I feel so old right now, lol.

In the past I've worked with a few different nutritionists, but even they gave very different advice. It seems like there are now so many different strategies for fueling, I don't even know where to begin.

I do have some stomach issues, especially in the run. Some people recommend 'natural, real foods than are fruit based' and others say avoid fructose. This is just one example. My REI nutrition selection is beginning to resemble an aisle at Whole Foods!

Where do I even start?

Thanks!