Energy gel is just the latest in the fad of high energy drinks and works on the same principles as most do. Any drugstore or convenience store sells energy gel drinks now.
Gu Energy Gel is no longer being sold by many retailers. They stopped making it and I can't find it anywhere. You will have to find a replacement gel.
Energy gel does work, some better than the others. It could cause bad headaches but that depends on the person using it. Sometimes it tastes terrible but it's mostly useful.
The best place to go to find Energy Gel is to your doctor or local pharmacy because there are different kinds. Depending on your body is going to determine how well it will work for you so finding your type would best be prescribed by your physical doctor.
You can visit any athletic enthusiasts site online such as RunnersWorld, RunningTimes, EnergyGelCentral and Active. There's much information to obtain and print out especially reviews for the energy gel products on these sites.
There is an interesting site that gives you a recipe to make your own gels. coolrunning.com.au. The opinion at www.paddypallin.com states that the first gel available was GU energy gel. It is good and easily digested. It is good for any sport you play. There is a good review on LG energy gels at militarytimes.com
There are many websites that offer various energy gel products. You can visit PowerBar.com or GUEnergy.com for some quick and easy online purchasing. You can also check out your local health food stores.
I have found that gel ones give me more blisters, but some people may find them good.
If you are looking to find more information on energy gel , you should check out your local department stores like Walmart, Dick Sporting Goods, Modell's, JCPenney and more. You can also check out their online website to see if this product is in stock or as a customer representative for help.
You can purchase some clif shot gel at Walgreens, Walmart and there are many other stores such as Footlocker, Kmart, JcPenney, Nike and Finishline. Just to name a few.
I believe it depends on each gel pak. For instance we carry Propak® Gel Paks, see http://www.millersupplyinc.com/index.php, for the product. If you go to the link below, it states all of the properties that the ProPak® gel paks contain. Find out the name brand of your gel pak and there should be some sort of Material Safety Data Sheets(MSDS) that you can find on the web that can tell you about that specific gel pak.http://www.propakproducts.com/images/pdfs/MSDS_ProPak_Gel_Packs.pdf
Amazon sells it and you can try some beauty stores.
I have searched around and did not find any negative affects caused by energy gels, therefore it should be safe to use. Many customers have showed positive reviews on energy gels, I would assume that the energy gel does what it is said to do.