I have done some fairly long events (Ironman several times and all the training it takes to get there) and I have found that hyponatremia is a key issue for me.
I am always interested in easy to handle ways to get salt in during exercise.
I pretty much just carry salt packets with me, and eat one per hour, and have found that works pretty well, but have been wondering if there are better alternates.
Oh and just to be difficult, whatever it is, needs to be kosher.