Kim,
The Metametrix OAT has some similar markers as the GPL OAT. However, there are specific things which get missed by other OAT’s which are important, specifically the 4-cresol and HPHPA coming from clostridia bacteria. If these are not analyzed than the negative influence on many other metabolic systems is missed. The Metametrix OAT lists DHPPA as a marker for toxic clostridia. However, DHPPA is a normal marker and does not cause inhibition of the Dopamine-Beta-Hydroxylase enzyme which negatively influences Dopamine metabolism.
Also, I don’t beleive the MetaMetrix OAT has the oxalate values either.
Sincerely,
Dr. Woeller