From Kre-Alkalyn.com “Even though scientist Jeff Golini originally discovered the Nitric Oxide amplifying agent AKG (Arginine Alpha-Ketoglutarate) over 11 years ago, his most profound achievement was inventing Kre-Alkalyn: the world’s first and only creatine that doesn’t convert to creatinine before reaching muscle.” …excellent
“While measuring each product’s reaction to fluid in 15-second intervals using NIR analysis, Jeff made a shocking discovery. Even the creatine serums and liquids had virtually no creatine left because the creatine content had all been converted to creatinine!”
“Then it happened - he ‘cracked the creatine code’. All his testing finally revealed the exact reason why creatine is so unstable and converts to creatinine in liquids: the problem all along was creatine’s low pH level!”
From another site: “Work presented by Professor Roger Harris way back in 1999 at a meeting in Milan  gave some great insights into creatine metabolism but more than that unequivocal scientific PROOF that creatine is highly stable in low pH environments.”  Harris, R.C. (1999) Effects and safety of dietary and supplementary creatine. International Congress Creatine: From Basic Science to Clinical Application: Milan.
Also from the same study: “at lower pH’s as found in the gut (pH <3) maximum loss by day 100 is only in the order of only 40%” So if you were to put 12.5 grams of creatine in a high acidic environment for 100 days you would still have a normal dose (5g).
With regard to the initial poster, creatine will likely help you with your goals and you can get regular creatine monohydrate for about $5 a lb. if you look around.