One thing I have learned about runners, is that everyone has a different taste when it comes to supplements. A quick list of what I have observed and/or tried include; gels, shot blocks, power bars, fig newtons, pretzel bits, sport beans and "Smucker's Uncrustables". Additionally, there are any number of electrolyte drinks and capsules.
Personally, I supplement my long runs with "gel". At the present time I am using "Hammer" brand, plain flavor. I have used other brands and flavors, but cannot distinguish a marked difference in the result. On average, I consume one packet every hour. At races that provide a sports drink, I will drink one small cup every other stop, alternating with water. With the high temperatures and humidity we experience here in Florida, I have added "Succeed- S!caps". They contain only sodium-341mg and potassium-21mg. The recommended dosage is one capsule per hour.
Once again I am asking for your input and/or suggestions. What do you use?