​L-Ornithine alpha-ketoglutarate (OKG) is a substance, formed of the molecules of two amino acids - ornithine and glutamine. ​​In a conjugated form, OKG can be found only as a specialized dietary supplement. 

​Its Individual components ornithine and glutamine are widely spread as part of the structure of protein chains in various foods.

​Besides the anti-catabolic functions that stop the release of cortisol, OKG is is famous for its anabolic effect in correlation with the processes of building new muscle fibers.

​While no one knows the exact mechanism of foreclosure of cortisol secretion after intake of OKG, statistics of reported studies suggest the probable blocking of enzymes that unlock the cortisol response at a cellular level.

If you want to stop the catabolic breakdown of your muscles during long aerobic workouts in the process of losing weight, you can always take advantage of its proven anticatabolic reputation. 

Studies also show that the action of OKG is improved if taken in addition to arginine and ornithine.​

​​L-Carnitine is a naturally occurring amino acid found in animal tissue (meat products) and milk to a degree, it is also a constituent of human breast milk.

L-Carnitine has many mechanisms by which it can theoretically increase the rate of fat loss, yet it doesn't seem to actually induce or augment fat loss when supplemented. The exception to this is in a deficiency state, in which L-carnitine supplementation will restore hindered fat burning potential.

​Insulin sensitivity can be increased with Carnitine supplementation in obese persons and those with impaired glucose tolerance, such as pre-diabetes and those with metabolic syndrome.

Improvements in sensitivity have been noted as quickly as 10 days with 2 g of Carnitine supplementation, although this particular study required a hypocaloric diet in conjunction with Carnitine supplementation.

L-arginine (here and after referred to as arginine) is a positively charged amino acid, which is classified as essential or conditionally indispensable at certain conditions.

Every fitness enthusiast has heard of L-Arginine, but few know that it neutralizes free radicals. It participates in the building of muscle tissue; it is included in the composition of proteins but has also many other actions.

​Everyone needs to take a sufficient amount of arginine, as groups with increased needs of this amino acid are adolescent children, athletes, people who are overweight and people who are old of age.

Intake of arginine by trained people can strengthen their immune system, thereby allowing them to train harder and to avoid the unpleasant consequences of overtraining.
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Overweight people recovering from injury, and those with erection problems, would also experience improved physical condition if they intake arginine.

Acetyl-L-Carnitine is an ester form of L-carnitine. Carnitine was discovered in 1905. It is synthesized, mainly in the liver and kidneys, from the essential amino acid lysine.

​Acetyl-l-Carnitine plays a critical role in energy production. It transports long-chain fatty acids into the mitochondria so they can be oxidized ("burned") to produce energy.

​There are four common forms of carnitine supplements: L-Carnitine, ALCAR, L-Carnitine L-Tartrate (LCLT) and Propionyl-L-Carnitine (GPLC).
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L-Carnitine can be synthesized in the human body from two dietary essential amino acids, L-methionine, and lysine.

​This process involves a few Vitamin C-dependent enzymes, and deficiencies of Vitamin C can impair L-carnitine biosynthesis.