How SportLegs is different
	
	
		Starfish and others-
Our ingredients label has to adhere to meticulous FDA guidelines.  A glance suggests SportLegs is just regular old cal/mag and vitamin D.  As clever Starfish noticed, it's not: It's lactate forms of those minerals, and that's what makes the difference.  See, "lactic acid" IS lactate.  It's what your muscles exchange to handle short sprint-duration energy needs.  And most sports are just sequences of sprint activity.  The better your muscles exchange lactate, the faster, longer and more effortlessly you can go.  The problem is that when you begin sports, your muscles start making way more than they can use constructively, which causes a technical domino effect which subsequently lowers your Lactate Threshold, the point where you run into the "burn" and accumulate the nasties which contribute to next-day soreness.  Your muscles continue to make too much lactate until your blood lactate level rises.  But taking SportLegs an hour before riding raises your blood lactate the same way.  So you trick your muscles into not making too much in the first place- as Bicycling magazine wrote, "a sneaky way to raise your lactate threshold and boost performance."  We think using something healthy to help sidestep the biggest turnoffs about riding isn't so much sneaky as just plain smart.  And it sure works, doesn't it?
We're grateful to you all for helping spread the word about a good thing.  Oddly, "team testosterone" members don't seem nearly as willing to tell anyone else about SportLegs.
	 
	
	
	
		Let me intrude here...(Sportlegs)
	
	
		I am part of that testosterone brigade that seems to not be discussing the claims of SportLegs, and since I find a discussion here, and not much anywhere else, please allow me to chime in. My wrench swears to me that his wife was greatly helped by Sportlegs, and I examined the label and saw that I could buy the Calcium Lactate in powder form for about 10 bucks a bottle. This translates into MANY bottles of SportLegs. A teaspoon of this is close to the Sportlegs dose (1.462g @ each 50 lbs = 5.8g for me, I am 175 lbs, the teaspoon translates to about 4.6g). I have been adding this to any drink about an hour before any long ride (more than an hour). 
I am also diabetic and have had humongous cramps while trying to examine my feet after a long ride, a routine which always requires me to bend down or lie down and pull upper legs toward my chest. I have found that in all long rides since starting this lactate addition (3 so far) I have had cramps only one time, and I attribute this to lying down with an ice pack on my knee instead of stretching after a 77-mile ride, as I was supposed to be doing. I have a century ride (I hope) this weekend and so another test of this is impending.
I do suspect that the calcium lactate made the difference; I stopped taking calcium citrate, potassium, or magnesium supplements during this period to help my test case. Lactate from magnesium would presumably be the same. 
I make my own Sports Drink with Smart Water, Nuun tabs, and maltodextrine and fructose, and use this during my rides.
The Tums alternative did not work for me, but the lactate appears to have done so. 
Just my two cents, but I agree with other posts that Sportlegs is horribly overpriced.