I use them both, and if I was only allowed one I'd pick nuun. However, I do like having both -- but I mainly use them on the bike.

Endurolytes are just electrolytes in a pill -- swallow it down and move on. As you've noticed, they are a bit big if you have trouble swallowing pills when running. I find them useful as a backup strategy on the bike: if I'm going with what is on the course, that often means gatorade for sports drink/electrolyte, and some days I just don't like it. Those days, if I have endurolytes in my pocket, I'll go with just water from aid stations and take endurolytes to get in some electrolytes.

Nuun is an electrolyte (and flavor) tablet that you mix in water. I'm not sure if you'd want to just eat it! I use that for my hydration when on the bike and carrying hydration with me, and I love it. Except for the Kona Cola (and I haven't tried the new Orange Ginger) I like the flavors. And I really like that it lets me keep my nutrition (calories) separate from my hydration and electrolytes (although endurolytes also does that). It dissolves fast and I like how it isn't really sugary sweet or surupy tasting -- I find it more refreshing.

For the run I have a feeling endurolytes are easier to carry, but if you can't swallow them, not sure how useful they are. You'd have to carry a water bottle or something with the nuun mixed in, or take the time to let it dissolve (fast, but not race-aid-station-fast) to use the nuun. Or you'd have to just eat the tablet -- I know people have done so, but I'm not sure how that worked for them.

It depends on your body and your race distances, but I find less of a need for electrolyte supplements on the run: I tend to bike with some nuun (or sometimes gatorade or endurolytes), but on the run I usually just go with what is available at aid stations.

Never tried Endurolyte, but NUUN for sure works. Only product that I've ever felt a difference after taking, I've got all my friends using it as well.

I love Nuun - I actually took a recommendation from Kylie a few weeks back (Thank you!), and decided to try it....

As a former watered down Gatorade guy, Nuun is such a great alternative. Light Fruity flavor (Tri Berry), a little effervescent, very good replenishment, and you can stretch a tablet at little bit to make it as about as cost effective as a case of Gatorade.

That being said, I have not tried Endurolytes but cant imagine I will as I am not a huge pill person. So I choose Nuun, although my only comparisons are to Gatorade Tiger, Gatorade Rain, Water with some salt, and plain water.

I have used electolyte tabs in the form of Thermolyte, and endurolyte.
I am comfortable with taking the capsules, but I am used to timing it with a water stop or if i carry water with me.
I haven't used NUUN but I am going to give it a try since i have heard many good things about it.
As Kylie indicated it is dissolved in water, and keeps your electolytes seperate from your nutrition. it is just a ddifferent way to get you electolyte supplement.

I've been using enduralytes in the powder form for a year now. I sweat a lot, and the powder form allows me to mix the right amount into whatever nutrition/hydration solution I'm using. If I'm doing an Oly, I usually just add a teaspoon or two (depending on the heat/humidity) of it to my water. For 3+ hour training runs/rides/bricks, I'll mix in a bit into my nutrition drinks as well. My body doesn't do too well with solids on longer outings, so I use cytomax/preformance, and adding enduralytes to that as well, helps me replenish. It's made a notable difference on how my legs feel later into the outing.

However, for really long events, the kind where you're likely to run out of water and need to stock up at an aid station, having the electrolyte in a tablet/pill would be really convenient.

My husband uses Nuun when he plays tennis, and he likes the different flavors that are not overwhelming. I use Hammer Endurolytes pills and powder, which I believe offer more overall mineral replacement than Nuun. The powder is handy to put in a bottle and then you don't have to contend with swallowing a pill.

I'm a fan of the nuun too, especially the kona cola :)

You can't pry me away form my Succeed! S!caps. I've been using them since '97 for everything from IM's to Ultras to "egg frying hot" centuries and double centuries.
Very simple. Capsules of Sodium Bicarbonate with Potassium. 1 cap is 341mg of sodium and 21mg of potassium. It's buffered so it neutralizes stomach acid. I need that since I have some reflux problems.
Good stuff.

Whatever makes it easier for you. The liquid form has great appeal though. I'd compare the dosage too. Maybe wash down Endurolytes with NUUN

Matt Cazalas
Technical Writer
Network Cables