It is quite possible, though, that the benefits of the MRI NO2 Black supplement for ME/CFS do not come so much from its arginine alpha ketoglutarate ingredient, but more from the
ActiNOS® ingredient, which the blurb says is scientifically proven to raise nitric oxide synthase (NOS) by 950%.
NOS is the body's enzyme which makes NO. The NOS enzyme makes NO starting with arginine as a raw material. So you need both arginine and NOS to produce NO.
Several body-building supplements contain this NOS-boosting ActiNOS ingredient, including these:
MRI - NO2 BLACK — ActiNOS content not given, but each 3 gram serving includes a proprietary blend of 150 mg of alpha lipoic acid + ActiNOS.
MRI - Pro-NOS — ActiNOS content not given.
Amix Nutrition - CFM Nitro Protein Isolate — contains
425 mg of ActiNOS per 100 grams of powder.
Reflex Nutrition - NOS Fusion —
1390 mg of ActiNOS per 100 grams of powder.
Pro Line Nutrition - Iso-Advanced Whey Protein Isolate — ActiNOS content not given.
Extrifit Sport Nutrition - Actinox Nitro Peptides —
1522 mg of ActiNOS per 100 grams of powder (I think).
ActiNOS is a whey-derived peptide fraction. ActiNOS was developed by a company called Glanbia Nutritionals. I think the scientific name for ActiNOS is nitric oxide peptide-47 (
NOP-47). Their info page on ActiNOS / NOP-47 is
here. To quote:
The study they are referring to in the above quote is
this one.