hmm...personally..if i were to take this supplement i would add it to pre or post workout but not use it as a replacement for carbs. Glycine is a non essential amino acid--it may be beneficial in repairing tissue but the body still needs carbs and/or fat for an energy source. You can obtain sufficient amounts of glycine from protein sources....here's a little more info:
Glycine is a sweet tasting, non-essential amino acid that was first isolated in 1820 from gelatin and is also found in good quantity in silk fibroin. This nonessential nutrient can be manufactured from serine and threonine, so dietary intake is not essential.
Glycine is required for
It is required to build protein in the body and synthesis of nucleic acids, the construction of RNA as well as DNA, bile acids and other amino acids in the body. It is further found to be useful in aiding the absorption of calcium in the body.
It helps in retarding degeneration of muscles since it helps to supply extra creatine in the body.
It is also found in fairly large amounts in the prostate fluid and may for this reason be important in prostate health.
The glycine amino acid is also used by the nervous system and its function as an inhibitory neurotransmitter makes it important to help prevent epileptic seizures and it is also used in the treatment of manic depression and hyperactivity.
Deficiency of glycine
Few people are glycine deficient, in part because the body makes its own supply of the non-essential amino acids, and because it is abundant in food sources.
Dosage
The dosage listed is the Recommended Daily Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.
Toxicity and symptoms of high intake
No clear toxicity has emerged from glycine studies, however individuals with kidney or liver disease should not consume high intakes of amino acids without consulting a health care professional.
When more may be required
In a study where men were given extra glycine over a period of time, it reduced the symptoms of prostatic hyperplasia.
Other interesting points
If the amino acid serine is required in the body, it can be converted from glycine.
Food sources of glycine
High protein food contains good amounts of glycine and is present in fish, meat, beans, and dairy products.
glycine
I know it's not common, most have probably not heard of this type of PWO shake but I find the new research knowledge is never common and often has great benefits. I'm giving this a go, can't hurt!
The thought process from it comes from Charles Poliquin who is genius, he is far ahead of any other trainer or nutritionist out there today. He recommends that all his clients take this pwo until they are under 10% bodyfat, they have NO carbs really until that point. And he trains many elite athletes such as Olympic athletes and a few UFC fighters just to name a few.
Here's some interesting points;
Glycine is the smallest and simplest of amino acids: its structure is so straightforward that it doesn’t even have ‘D-’ and ‘L-’ forms. And although it’s the second most-used amino acid in the biosynthesis of proteins and enzymes, and despite the fact that it’s essential for the phase-II detoxification of many xenobiotics, and for the body’s manufacture of such critical biomolecules as nucleic acids, the high-energy carrier creatine phosphate, and the key antioxidant glutathione (GSH), glycine has largely been neglected as a readily-available and “non-essential” nutrient. But all that has changed in the last few years. Recent reviews in the
scientific literature have had titles like “Glycine – an inert amino acid comes alive” and “L-Glycine: a novel antiinflammatory, immunomodulatory, and cytoprotective agent.” As research into this conditionally-essential amino acid has progressed, the health impacts associated with the real limits of availability of glycine – and the benefits of supplementation well above the levels readily available from the diet – have become increasingly clear. Glycine is emerging as a critical unsung hero of human nutrition for brain and body.
Glycine and Growth Hormone (hGH)
In addition to is exciting potential for supporting the healthy functioning of the brain, Glycine may provide us with part of the key to reversing some of the more visible symptoms of the aging body. For some time, research has been focusing in on the age-related loss of human growth homone (hGH, or somatotropin) as a major source of the symptoms of aging. hGH helps keep our bones strong, our immune systems vigorous, our wound-healing abilities optimal. It builds muscle and burns fat. Its levels are high in our youth, when all of these functions are at their peak, and their decline follows the decline in many aspects of youthful function. As experiments by Dr. Daniel Rudman and others have shown, administration of hGH to aging humans can bring about changes in body composition which are “equivalent in magnitude to the changes incurred during 10-20 years of aging.”
While many substances are touted as hGH precursors or secretagogues, few are actually documented to boost levels of the hormone – and of those that are, many are marketed in formulas in which they are mixed in with other factors that blunt their effectiveness, or are only effective at doses significantly higher than the recommended dose. But less than 6 grams of glycine has been shown to more than triple hGH levels in normal, healthy men and wormen. This effect is again likely connected to glycine’s role as a coagonist of the NMDA receptor.
Glucose Metabolism
The surge of blood sugar that happens following a meal – especially one high in carbohydrates and/or in glycemic index – is a metabolic roller coaster, leading to sugar ‘highs’ and crashes, carb cravings, metabolic dysregulation, and ultimately insulin resistance and ill-health. Finding new ways to control this post-meal jump in blood sugar is an important part of maintaining our health.
A recent study suggests that Glycine may be the next tool at our disposal to keep blood sugar on an even keel. In this study, healthy men and women were tested on four separate occasions, in which they were given 25 grams of glucose alone; glucose with 5 grams of glycine; glycine alone; or plain water. The plain glucose, unsurprisingly, rushed into the volunteers’ bloodstreams, leading to a huge blood sugar ‘spike;’ but glycine supplementation reduced the total increase in blood glucose by a remarkable 50%. Importantly, this channeling of the glucose surge was not accompanied by any increase in insulin levels, nor did it push fasting glucose levels down into hypoglycemia: the mechanism remains unknown, and the effect was so distinct from other glucose-lowering agents that the researchers who reported the result even speculate that the result may lead to the discovery of a new gut hormone regulating glucose metabolism.
Re: glycine
Are you still following the "anabolic" diet? If so, than the postworkout shake you are trying makes a little more sense but for the average person following a diet of pro/carbs/fat should stick to actual carbs and protein postworkout
hey
Nope I went off the AD beginning of May really although I'm kinda eating like that now. I do not eat carbs other than veggies/fruit, berries or a bit of plain yogurt in my pwo shake. But then once on the weekend I eat bad stuff
I want to gain mass and know I should eat some carbs..... will soon when I have more than 5 minutes at home to cook or plan :S For now I eat chicken or steak cold, a protein bar with no carbs, a shake or.... well that's it lol. NO time :S
I will start to eat rice/sweet potatoes though...
but ya for PWO I feel sick when I eat high glycemic carbs.... why is that do you think???
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