SPI (soy protein isolate — the ingredient you most often find in veggie burgers, energy bars and other modern
products — contains some 38 petroleum compounds including, but not limited to: butyl, methyl and
ethyl esters of fatty acids, phenols, diphenyls and phenl
esters, abietic acid derivatives, diehydroabietinal, hexanal and 2 - butyl -2-octenal aldehydes; dehydroabietic acid methyl
ester; dehydroabietene and abietatriene.
Study Method: Each
product was incubated in 900 ml of pH1 HCL and samples were taken at 5, 30, and 120 minutes - at which time creatine availability was assessed by immediately assaying for free creatine, creatine
ethyl ester, and creatinine (breakdown
product of creatine) using HPLC.