I have been running for many years and have come to know what my body needs so that I can perform at my best and recover quickly. S-caps work very well for me. I like the fact that they are buffered so that it does not upset my stomach. The capsules also contain potassium which is necessary for good cell absorption. I take S-caps with my regular electrolytes because I need a little more sodium chloride than the average person. The capsules are very convenient. They are a pre-measured dose and I take one for about every hour running depending on how hot it is. I just carry them in my running belt pack in a small plastic bag to make sure they stay dry. I have been using them successfully for years. It is a very good product.