Glycocyamine.
Glycocyamine supplementation for targeted health support. Converts to creatine in the liver via methylation. Increases muscle creatine stores indirectly. May have some direct effects on energy metabolism.
Reviewed March 2026
- Category
- General
What Glycocyamine is, and what it does.
- Does it work
- It suits people who want to feed the creatine pathway one step earlier, especially alongside methyl donors. Anyone wanting the simplest route can use creatine itself.
- How much to take
- 1-3g daily if used. Should be taken with methyl donors (betaine, B12, folate) to offset depletion.
- Time to feel it
- Muscle creatine fills up over weeks, so any change in training output lands around weeks three to six rather than on the first day.
- The first dose
- Nothing noticeable. Like creatine, effects build over days to weeks.
- With regular use
- Increased creatine levels, but also increased homocysteine if methyl donors aren't supplemented. Risk-benefit unclear.
- How well tolerated
- Concerns about homocysteine elevation and methyl donor depletion. Less safe than creatine for most users.
- How it feels
- Subtle performance benefits similar to creatine. May feel less effective than direct creatine supplementation.
- The overlooked benefit
- Turning it into creatine is one of the body's biggest users of methyl groups, which is why betaine, folate and B12 belong alongside it in a formula.
500 to 1,500mg a day is where Glycocyamine works.
Source: Ostojic et al. Int J Sports Med 2014; creatine precursor research
The proof, claim by claim.
These words describe the research, not the molecule's worth. Research strength is how much work stands behind one claim, and it is never a product score.
Glycocyamine has emerging evidence. Based on 712+ studies.
- Increases muscle creatineMetabolic pathway studies
- Raises homocysteineHuman studies show this effect
- Performance enhancementLimited studies, less effective than creatine
- Alternative for creatine non-respondersProposed but not proven
Questions people ask about Glycocyamine.
- Why not just take creatine?
- Good question. For most people, creatine monohydrate is better. Glycocyamine is only interesting for creatine non-responders.
- What's the homocysteine concern?
- Converting glycocyamine to creatine uses methyl groups. This can raise homocysteine, a cardiovascular risk marker.
- Can I combine it with creatine?
- You could, but why? The creatine is doing the work. Glycocyamine would just add methyl depletion concerns.
- Is it natural?
- Your body makes glycocyamine naturally as part of creatine synthesis. Supplementing it bypasses part of that pathway.
- Should I take methyl donors with it?
- If you use glycocyamine, yes. Betaine, B12, and folate help offset the methyl depletion.
- Is it banned in sports?
- Not currently banned, but check your sport's specific rules. It's a gray area.
Why these belong in the same formula. Each row says what the basis is, from settled biochemistry through to a trial that measured the pair.
Guanidinoacetate is the direct precursor of creatine. A single methylation step by guanidinoacetate methyltransferase converts one into the other, mostly in the liver.
Arginine donates the amidino group that AGAT transfers onto glycine to form guanidinoacetate. Arginine availability sits upstream of how much of this precursor the body makes.
Glycine is the acceptor in the AGAT reaction that produces guanidinoacetate. The molecule is glycine with an amidino group attached.
The conversion of guanidinoacetate to creatine takes its methyl group from S-adenosylmethionine. This single reaction accounts for a large share of the body's whole methyl group turnover.
Betaine re-methylates homocysteine back to methionine, which regenerates the SAM-e that the methylation step consumes. Pairing them supports the methyl pool that this conversion draws down.
5-methyltetrahydrofolate feeds the other route that converts homocysteine back to methionine. It keeps the methyl cycle turning while guanidinoacetate methylation draws on it.
Methionine synthase needs B12 to accept the methyl group from folate and pass it to homocysteine. Without adequate B12 the folate route to regenerating methionine stalls.
Choline is oxidised to betaine, which then serves as a methyl donor for homocysteine re-methylation. It is the dietary reservoir behind the betaine route.
Methionine is converted to SAM-e, the molecule that hands its methyl group to guanidinoacetate. Methionine supply therefore sets the ceiling on this methylation step.
Every methyl group glycocyamine takes to become creatine leaves behind S-adenosylhomocysteine and then homocysteine. One of the two exits for that homocysteine is transsulfuration, and both cystathionine beta-synthase and cystathionine gamma-lyase run on pyridoxal-5-phosphate. Low B6 status narrows that exit while the methylation load stays high. This is cofactor biochemistry, and it is the reason the stored claim about raised homocysteine matters.
P5P is the coenzyme form itself, so it does not depend on hepatic pyridoxal kinase conversion. The relevance to glycocyamine is the same transsulfuration exit for homocysteine. Which B6 form a formula uses is a formulation decision, not a ranking.
The other exit for homocysteine is remethylation using 5-methyltetrahydrofolate, and the enzyme that makes that folate form, MTHFR, requires FAD from riboflavin. Riboflavin status therefore sits upstream of folate-dependent remethylation. It is a quiet dependency that gets left out of methylation stacks.
The betaine route for remethylating homocysteine runs through betaine-homocysteine methyltransferase, which holds a catalytic zinc. That matters because betaine is the usual partner offered alongside glycocyamine to absorb the methyl demand. Zinc status is part of whether that route works.
Serine hydroxymethyltransferase moves a carbon from serine onto tetrahydrofolate, which is where the methyl for homocysteine remethylation ultimately comes from. Serine and glycine are also interconvertible by the same enzyme, and glycine is one of the two substrates that make glycocyamine in the first place. The pool is shared in both directions.
Homocysteine leaving by the transsulfuration route becomes cystathionine and then cysteine, which feeds glutathione synthesis. Supplying cysteine directly changes the demand on that pathway rather than clearing homocysteine faster. The relationship is real biochemistry; whether adding cysteine lowers homocysteine in a person taking glycocyamine has not been measured here.
Cysteine generated from homocysteine can be oxidised toward taurine, so taurine sits at the far end of the same pathway. That makes it a marker of pathway flux more than a lever on it. Formulas that pair the two are working from pathway logic.
Creatine only buffers energy because creatine kinase transfers a phosphate between ATP and creatine, and the substrate is magnesium-bound ATP. Raising tissue creatine through a precursor does nothing without adequate magnesium for the transfer step. Standard bioenergetic biochemistry.
L-arginine:glycine amidinotransferase transfers an amidino group from arginine to glycine, producing guanidinoacetate and ornithine, and ornithine feeds back to restrain that enzyme. Supplying ornithine therefore acts on the step upstream of glycocyamine rather than helping it along. Anyone stacking ornithine with a creatine-precursor strategy should know the arrow points the other way.
Beta-alanine raises muscle carnosine and buffers intracellular protons, which is a different route to the same training goal as loading the phosphocreatine system. The two do not interact chemically. Stacking is a formulation choice with independent mechanisms, not a measured combination here.
Nothing specific on file for Glycocyamine. Match the label to the daily amount above, and tell your doctor what you take.
Not medical advice. Show the label to your pharmacist.What Glycocyamine actually does.
Glycocyamine is the molecule the body makes from arginine and glycine on the way to creatine.
The body adds one methyl group to it, and that methyl comes from the SAM pool.
Making creatine this way produces homocysteine as a by-product, one for one.
Homocysteine is cleared either by getting a methyl group back or by being converted toward cysteine, and each route needs its own vitamins.
Where Glycocyamine comes from.
It is made in a chemical plant from glycine, not extracted from a plant or an animal. The molecule is the same one your kidneys already make.
Chemically synthesised. The molecule is identical to the one a plant or an animal makes, and building it deliberately means a known purity, a fixed dose and no crop contaminants. For several nutrients this is the only route that reaches a usable amount.
Industrial guanidinoacetic acid starts from glycine and a cyanamide-type guanidino group donor. Both feedstocks are commodity chemicals, and glycine itself is commonly produced by chemical synthesis or by fermentation depending on the supplier.
The amidino group is added to the glycine nitrogen in aqueous alkaline conditions. This is the same bond the body's amidinotransferase forms, built chemically instead of enzymatically.
The product is isolated by adjusting pH toward its isoelectric point, where solubility drops and crystals separate, then washed. Residual reagent and salt removal is what the wash steps are for.
Batches are assayed for guanidinoacetic acid content and screened for process residues. Because the molecule is a small, simple chemical, identity is straightforward and the meaningful specification is purity.
Sold as a milled crystalline powder, blended into capsules, tablets or drink mixes.
Suppliers rarely state the guanidinating reagent used or the residual solvent and reagent limits, which is the part of the spec that actually varies.
Getting Glycocyamine from food.
The whole-food sources on file. A supplement closes the gap, it does not replace dinner.
A gram-for-gram figure (how much of each you would eat to match a dose) will appear here once it is sourced and reviewed. This page will not print a number it cannot cite.
The forms it comes in.
The essence, in one line each.
- Creatine taken together with guanidinoacetic acid raised prefrontal brain oxygenation, a measured marker, before, during and after a cognitive task compared with control.Randomised trial. Zanini et al., 2025 (Nutrition and health). PMID 39569437 ↗
These are the studies our verdict leans on, chosen from the 167 we read for Glycocyamine. The full linked list is below.
FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. Consult your healthcare provider before starting any supplement regimen.