Abstract
Creatine (CR), is recommended for application as food supplement. It is supposed that human organism uses it for formation of CR phosphate as source of energy.
In our short-term experiments we have observed changes in the metabolism of two-carbon (2C) units and of thiolic substances 4 to 6 hours after CR supplementation. The level of thiodiglycolic acid (TDGA) in urine increased rapidly and then decreased again to the original level.
The level of TDGA in urine is a marker of disturbance in metabolic pathways of 2C units and of thiolic compounds. Our long-term CR supplementation, revealed that the biochemical pathways, affected by CR application included intrinsic participation of vitamin B12 and folates.
The levels of those two vitamins changed in a mutually reverse way. The men under study can be divided into 4 different groups according to changes of CR levels found in urine, and of levels of folates and vitamin B12, determined in blood before and after CR administration.