Effect of oral creatine supplementation on urinary methylamine, formaldehyde, and formate.

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=pubmed&dopt=Abstract&list_uids=16260971

I infer that it would be wise not to "load" on creatine: there is
considerable increase in methylamine and formaldehyde (9.2 and 4.5
fold) at a high dosage of 21g/day. The mg numbers "per 24 hours"
increased from 0.69 to 6.41 for methylamine and from 64.78 to 290.4
for formaldehyde.

According to my quick calculation, this amount of formaldehyde can be
internally produced from drinking of about 6.25 liters of a typical
aspartame-containing soda.

Too bad they didn't look at the numbers after the muscle saturation is
reached for a more realistic dosage is, say, 1 to 5g/day.

DZ