Ingredient form · Magnesium

Magnesium glycinate

Also sold as magnesium bisglycinate, bis-glycinate, diglycinate or glycinate chelate. These are all the same compound and SuppScore scores them identically. One page, one score, whichever name is on the bottle.

Tier A · ×1.5 Confidence High Rank among magnesium forms 1 of 20 Studies cited 3 Updated 31 Jul 2026

Part of

Magnesium · glycinate is one of 20 graded forms. Dose zones, benefits and safety information are held on the parent page.

Hero · the alias line is the single most important sentence on this page Two of the largest queries in this cluster are the same entity under different names. "Magnesium glycinate" runs at 201,000 a month. "Magnesium bis glycinate" adds another 18,100. "Magnesium glycinate vs magnesium bisglycinate" runs at 3,600, doubled to 7,200 across two phrasings, which tells you plainly that a large number of people do not know these are the same thing.

Without an explicit alias rule we ship two pages that compete with each other for 288,950 monthly searches, and neither wins. The rule is: one canonical page, every alias declared on-page and in alternateName, and the alias list doubles as the resolution table the label scanner uses when it reads "Mg bisglycinate" off a bottle. This is the highest-risk de-duplication call on the entire magnesium cluster and it is solved in one sentence of copy plus one array in schema.

"1 of 20" is doing quiet work. It tells the reader instantly that this is the best form without us having to claim it, and it is the sort of specific, comparative, verifiable statement that gets quoted. A bare "Tier A" means nothing to a first-time visitor. "Top of 20 graded forms" means something immediately.

The Part of block is mandatory on every form child. It is the one-hop rule made visible: the reader always knows where they are in the hierarchy, and the crawler always has a link up to the canonical entity.

Is magnesium glycinate a good form?

Magnesium glycinate is a Tier A form, the highest evidence tier in the SuppScore system, carrying a 1.5 multiplier. Randomised controlled trials and stable isotope studies confirm its absorption is superior to magnesium oxide, which sits at Tier D with under 4% fractional absorption (Walker 2003, Schuette 1994, Siebrecht 2013). The glycine chelate is also gentler on the gut than citrate or oxide, which is why it is the form most often chosen for evening dosing and for people who react badly to other magnesium supplements.

Glycinate · Tier A · ×1.5 Oxide · Tier D · ×0.85

Tiers are assigned from published absorption evidence, not from price or popularity. How form tiers are set.

AEO · the block an assistant lifts for "is glycinate better than oxide" Three-sentence formula again, but tuned differently from the parent's verdict block. The parent block answers a comparative question across all forms. This one answers a verdict question about one form, so sentence one states the tier and the multiplier as fact, sentence two attaches the absorption evidence with three named citations, and sentence three gives the practical consequence, which is what a real person actually wants.

Why the third sentence is about tolerability and not more evidence. Someone asking "is glycinate good" is usually deciding between it and something they already tried that upset their stomach. The gut tolerability point answers the question behind the question. It is also genuinely form-specific, which is the test every sentence on this page has to pass.

Naming oxide in the verdict is deliberate. It gives the block a comparison anchor, which makes it more quotable, and it seeds the internal link to the oxide page. A claim with a named comparator outperforms a claim in isolation, both for readers and for retrieval.

// the form is its own entity, related UP to the parent DietarySupplement #magnesium-glycinate isPartOf → DietarySupplement #magnesium ← the one-hop rule, in the graph activeIngredient: "Magnesium" additionalProperty: [ {tier: "A"}, {multiplier: 1.5}, {confidence: "High"} ] // alternateName carries all five alias spellings

What is magnesium glycinate?

Magnesium glycinate is magnesium bound to two molecules of glycine, an amino acid. That binding is called a chelate, and it is what changes how the mineral behaves in the gut. Instead of dissolving into a loose salt that draws water into the bowel, the chelate stays intact long enough to be taken up through amino acid transport pathways as well as the usual mineral routes.

Two practical things follow. Absorption is higher than from inorganic salts such as oxide, and tolerability is better, which means fewer loose stools at the same elemental dose. Glycine itself is not inert either: it is a well studied compound in its own right with an established association with sleep onset, which is part of why this particular chelate became the default choice for evening magnesium.

Definition · form-specific from the first word Test every sentence: could this appear on the parent page? If yes, it does not belong here. This definition never explains what magnesium does, because that is the parent's job and duplicating it is how a child page starts competing with its own parent for the head term. Everything here is about the chelate: what it is, what the binding changes, and why it matters.

The live data does the opposite. The current glycinate record reads "A good form of magnesium which is moderately absorbable" and then continues into four sentences about magnesium supporting over 300 processes, energy production, protein synthesis and blood glucose. That is parent content sitting in a form record, and it appears verbatim on the TRAACS record too. At scale, 149 form rows in the ingredient data share their description text with at least one other form. Shipped as-is, that is 149 near-duplicate pages.

"Moderately absorbable" is also a direct contradiction. The same compound is graded Tier A on the strength of superior bioavailability evidence in the multiplier sheet. Two of our own fields disagree about the central fact of this page. Resolving that is a data fix, not a copy fix.

NLP note. Primary entity is "magnesium glycinate" and must stay above 0.30 salience. The supporting neighbourhood here is chelate, glycine, amino acid, bioavailability, tolerability. Notice what is absent: enzymatic reactions, blood glucose, bone health. Those belong to the parent's entity neighbourhood, and pulling them in here is what pushes this page toward competing for "magnesium".

How much magnesium is actually in it?

The number on the front of the bottle is usually not the number that matters.

Label says

1,000

mg magnesium glycinate

You actually get

~141

mg elemental magnesium

Magnesium makes up only part of the compound by weight. In pure magnesium bisglycinate the mineral accounts for roughly 14% of the total, with the two glycine molecules making up the rest. So a label reading "1,000 mg magnesium bisglycinate" delivers around 141 mg of elemental magnesium, which lands in Zone 2 of our dose model, not Zone 3. A label reading "1,000 mg magnesium (as bisglycinate)" means something completely different and delivers seven times more.

This is the single most common way magnesium labels mislead, and it is not usually deliberate. Both statements are legal. Check whether the label says elemental magnesium, or run the product through the analyser and we will work it out from the label for you.

Blocking: elemental % is not yet a field in the data contract

The signature section · genuinely original, genuinely useful, nobody else publishes it clearly This is the strongest piece of content on the page and it exists because of a query. "Is 500 mg of magnesium glycinate too much" appears twice in the universe at 880 each, and the honest answer is that the question cannot be answered without knowing which number the label means. Every competitor answers it anyway, badly. We can answer it properly, which is exactly the kind of asymmetry that earns citations.

Why it deserves the visual weight. It is the one moment on the page where a reader learns something that changes what they buy. Everything else confirms or ranks. This reframes. It also resolves the design tension I flagged in the original template brief: dose zones are a parent-level attribute and this page should not restate them, but there is roughly 5,600 a month of form-level dose demand. The resolution is that the parent owns the zones and this page owns the conversion into them. No duplication, and each page answers something the other cannot.

The 14% figure is chemistry, not our data, and that is a problem. It is derived from molecular weight and it is correct for pure bisglycinate. Many commercial products are "buffered" blends of bisglycinate and oxide, where the real figure is higher and the tier claim is arguably weaker. Elemental magnesium percentage per form must become a contract field. Until it does, this section ships with the figure marked as approximate, or it does not ship. Do not let a computed number that looks authoritative go out unverified on a YMYL page.

Enhancement path. At launch this is static, using the most common label size as the worked example. Post-launch it becomes an input where a reader types their own label figure. The static version already captures the query, so the interactive version is an upgrade rather than a dependency.

Note the last line is a conversion moment that is not a sales pitch. "Run it through the analyser" is the genuinely most useful next step for someone holding a confusing label, which is the only reason it is there.

Is magnesium glycinate well absorbed?

The evidence behind the Tier A rating, in date order.

1994 Schuette, Lashner, JanghorbaniCompared magnesium diglycinate against magnesium oxide in patients with ileal resection, a group with impaired absorption. The chelate outperformed the oxide, which is a demanding test because the population absorbs everything poorly.
2003 Walker, Marakis, Christie, ByngRandomised, double-blind comparison of magnesium preparations measuring red blood cell magnesium rather than serum, which is the more meaningful marker because only about 1% of body magnesium circulates in blood. Organic forms outperformed oxide.
2013 SiebrechtReview of bisglycinate specifically, covering absorption pathway and tolerability. The basis for the chelate being treated as a distinct absorption route rather than simply a better-dissolving salt.

What the evidence does not settle

The comparisons that exist are mostly glycinate against oxide, and glycinate wins those clearly. Head-to-head trials against citrate and the other Tier B organic forms are thinner, and where they exist the gap is narrower than the tier difference might suggest. Tier A reflects the strength and consistency of the evidence, not a claim that glycinate is dramatically better than every alternative.

Evidence · where a form page earns its right to exist This section is the reason this page is not thin. A form page with only a definition and a tier badge is a thin page and should revert to a summary row on the parent. What makes it substantial is our own graded evidence rendered in full: the studies, what each one actually measured, and why it counts. No competitor publishes the reasoning behind a form rating because no competitor has a form rating.

Chronological order, not importance order. It shows an evidence base accumulating over three decades, which is a stronger trust signal than a ranked list, and it visibly separates us from sites that cite one paper and call it settled.

"What the evidence does not settle" is the highest-value paragraph in this section. It is also the one a marketer would delete. Stating the limits of our own top rating does three things: it is true, it pre-empts the criticism that a scoring system inflates its favourites, and it is precisely the kind of qualified statement an AI assistant quotes when it wants to avoid overclaiming. Sources that hedge everything get ignored. Sources that commit and then honestly bound the claim get cited.

The red blood cell versus serum detail is the sort of specific, slightly technical fact that signals genuine expertise to both a knowledgeable reader and a retrieval model. It costs one clause.

How magnesium glycinate compares

Glycinate sits at the top of the tier ladder. Here is the short version, with the full head-to-head on each comparison page.

Versus Magnesium citrate B One tier down at ×1.25. Well absorbed, but more likely to loosen stools. Often the better choice if constipation is the goal. Versus Magnesium oxide D Three tiers down at ×0.85 and under 4% absorption. The most common form on UK shelves and the weakest we grade. Versus Magnesium L-threonate B One tier down at ×1.25. Evidence for crossing into the central nervous system, but thinner on systemic absorption. Versus Magnesium taurate B One tier down at ×1.25. Well tolerated, but no stable isotope comparison studies exist.

Or see all 20 magnesium forms ranked by evidence tier.

Comparison · a lead-in, deliberately not a comparison This section is capped on purpose and it is the discipline that keeps the architecture intact. "Magnesium glycinate vs magnesium citrate" runs at 8,800 a month across two phrasings and it has its own page. If this section answered it fully, the comparison page would be redundant and the two would compete. Two sentences per comparison, a real judgment in each, then a link. Enough to be useful, not enough to cannibalise.

Every card carries an actual verdict, not a spec row. Versus.com built an enormous business on two-column attribute comparisons and was flattened by the helpful-content update, because data-only comparisons are classified as scaled unoriginal content. Our comparisons survive that test only if each one contains original judgment. "One tier down, more likely to loosen stools, better if constipation is the goal" is judgment. A table of molecular weights is not.

The citrate card recommends against glycinate in one use case. That is intentional. A scoring system that always concludes its top-rated option is right for everyone is a ranking, not an assessment, and readers can smell the difference.

The link back to the parent's form table catches anyone who wants the full picture and routes them to the hub rather than to a competitor's comparison article.

What is magnesium glycinate best for?

Glycinate is a delivery form, so its uses are magnesium's uses. What the form changes is how much reaches you and how well you tolerate it, not what magnesium does once absorbed. It scores highest where consistent daily intake and gut tolerance matter most.

Sleep quality Strong Stress and anxiety Moderate Muscle function and cramp Moderate PMS and menstrual symptoms Moderate

The sleep association is the strongest reason people choose this form specifically. Magnesium has moderate evidence for sleep quality, and glycine has its own separate evidence for sleep onset, so the chelate delivers both. See every ingredient graded for sleep.

Benefits · the paragraph before the chips is the anti-cannibalisation device "Glycinate is a delivery form, so its uses are magnesium's uses" is the most important sentence in this section. Without it, this section would drift into a full benefits treatment and start competing with the parent for "magnesium benefits" at 12,100. With it, the page says the honest thing, hands the depth upward, and keeps its own entity focus. It is also simply true, which is usually how these tensions resolve.

The one genuinely form-specific benefit claim is the glycine and sleep point, and it is the only place this page goes deeper than the parent on a benefit. That is justified because it is a property of the chelate, not of magnesium. "Magnesium glycinate sleep" at 6,600 plus "does magnesium glycinate help you sleep" at 1,300 is real, form-level demand and this is the honest way to serve it.

Chips rather than the parent's graded rows. The parent lists seven benefits with descriptions because it owns that intent in depth. Four chips here signal "these are relevant, the detail is elsewhere". Visual hierarchy carrying the same message as the copy.

How much magnesium glycinate should you take?

Dose is a property of magnesium, not of the form, so the graded dose bands live on the parent page. Work out your elemental magnesium first using the section above, then check which zone it falls in. A Zone 3 dose of magnesium is a Zone 3 dose whether it arrives as glycinate or as oxide, the difference is how much of it you actually absorb.

See the magnesium dose zones

What is genuinely form-specific Glycinate is better tolerated than oxide, citrate or sulphate at the same elemental dose, because the chelate is absorbed rather than drawing water into the bowel. The laxative threshold that applies to loosely bound forms is less of a constraint here, which is why glycinate is the form most often used when a higher intake is needed. It is not a licence to take more, and the upper limit context on the parent page still applies.

Dose · a pointer, not a section, and the reasoning is worth understanding There is roughly 5,600 a month of form-level dose demand across "dosage magnesium glycinate", "magnesium glycinate dose", "magnesium glycinate dosing", "magnesium glycinate sleep dosage" and "magnesium glycinate dose for sleep". The instinct is to build a dose section here to catch it. That instinct is wrong and it would duplicate the parent's most legally sensitive content across ten form pages, creating ten copies to keep in sync and ten places to get it wrong.

The correct split. The parent owns the zones because dose is keyed to the ingredient in our data. This page owns the conversion into them, which is the elemental section above and is genuinely form-specific. The pointer routes the intent, and the safety box adds only what is true of the chelate and not of magnesium generally. Nothing is duplicated and both pages answer something the other cannot.

Note what the safety box does not say. It never states a milligram figure and never tells anyone what to take. "It is not a licence to take more" is there deliberately, because the preceding sentence could otherwise be read as encouragement. On a YMYL page, the sentence after the reassuring one matters as much as the reassuring one.

If the client team ever holds form-specific dose data, this splits differently and the template changes. Flagged in the original brief, still open.

Capsules, gummies, powders and drinks

The tier does not change with the format, because the compound is the same. The score usually does. Gummies and flavoured drinks need sugars or sweeteners, gelling agents and colourings to work, and each of those attracts an excipient penalty in our model. They also tend to carry a lower elemental dose per serving, because there is a limit to how much mineral you can put in a sweet before it tastes of it.

So two products can both use Tier A glycinate and score very differently once dose and additives are counted. Powders and capsules generally score better than gummies for the same compound, and a plain capsule with no unnecessary fillers is usually the cleanest way to take this form.

Format · a small section that only we can write Demand: "magnesium glycinate gummy" and "magnesium glycinate gummies" at 1,900 each, plus "magnesium glycinate drink" at 1,300 and "magnesium glycinate pills" at 1,600. Around 6,700 a month on format, all at very low difficulty, and it goes almost entirely unanswered with any rigour.

Why this section is strategically valuable out of proportion to its size. It is the only place on the page where all three layers of our model appear together: form tier, dose, and excipient penalties. It demonstrates that the score is a system rather than a rating, and it produces a genuinely non-obvious, useful conclusion that a reader can act on. That is what a citation looks like.

"There is a limit to how much mineral you can put in a sweet before it tastes of it" is the one plain-language sentence in this section and it is doing the heaviest lifting. Most people have never considered why gummy doses are low. Explaining a mechanism a reader has felt but never articulated is one of the most reliable ways to earn trust.

Side effects and interactions

SuppScore does not cover side effects, drug interactions or contraindications. That applies to every form of magnesium, so there is nothing form-specific for us to add here. The tolerability points on this page describe how the chelate behaves in the gut compared with other forms, which is a scoring observation and not medical guidance. For anything else, speak to a pharmacist or GP.

Clinical · the hardest call on this page "Magnesium glycinate side effect" runs at 8,100 a month, keyword difficulty 54. It is the second largest modifier in the entire form cluster after benefits. We are choosing not to answer it, and that costs real traffic.

Why the answer is still no. Side effects are YMYL content and the blueprint gate is unambiguous: no clinical content until a named, credentialled reviewer is attached. That gate exists for a reason and a big number on a keyword sheet is not a reason to move it. The form child carries no clinical module at all, by design, and any clinical question resolves up to the parent's reserved slot.

Why the section exists at all rather than being silent. Silence on a query with 8,100 monthly searches reads as an omission. Saying plainly what we do not cover, and why, is a trust signal and it manages the reader's expectation before they scroll looking for something that is not there. It also draws the line between tolerability, which we do discuss because it is a scoring input, and side effects, which we do not. That distinction is precise and it needs stating.

What unlocks this. One named reviewer. When the parent's clinical layer switches on, this section becomes a pointer to it rather than a boundary statement. It is a change of one paragraph, and the 8,100 becomes addressable.

Common questions about magnesium glycinate

Six questions with no natural home in the sections above.

Is magnesium glycinate the same as magnesium bisglycinate?

Yes. They are the same compound, magnesium bound to two molecules of glycine. Bisglycinate is the chemically precise name and glycinate is the shortened trade name. SuppScore grades both at Tier A with a 1.5 multiplier and treats them as one entity, so a product labelled either way scores identically.

Is 500 mg of magnesium glycinate too much?

It depends on which number the label means. If 500 mg refers to the magnesium glycinate compound, the elemental magnesium it delivers is far lower, because magnesium makes up only a fraction of the compound by weight. If 500 mg refers to elemental magnesium, that sits above the point where a laxative effect becomes likely from most forms. Check whether the label states elemental magnesium, and see the magnesium dose zones for the graded bands.

Does magnesium glycinate help you sleep?

Magnesium glycinate is the form most often chosen for sleep, for two reasons. Magnesium itself has moderate evidence for sleep quality, and the glycine it is bound to is separately associated with sleep onset. SuppScore grades magnesium for sleep on the parent page, and glycinate is the top-scoring form to deliver it.

What is magnesium glycinate good for?

Magnesium glycinate is a delivery form, so its uses are magnesium's uses: sleep quality, muscle function, stress regulation, bone health and energy metabolism. What the glycinate form changes is how much magnesium reaches you and how well it is tolerated, not what magnesium does once absorbed.

Are magnesium glycinate gummies as good as capsules?

Usually not, on the SuppScore model. The form tier is unchanged because the compound is the same, but gummies typically carry a lower elemental dose per serving and attract excipient penalties for the sugars, gelling agents and colourings needed to make them. Two products with identical Tier A glycinate can score very differently once dose and additives are counted.

When should you take magnesium glycinate?

There is no absorption reason to prefer a particular time of day. Evening dosing is common because glycinate is most often taken for sleep. Unlike oxide and citrate, glycinate does not usually need to be taken with food to avoid loose stools, which is one of the practical advantages of the chelate.

FAQ · six, and every one is form-specific 185 glycinate questions sit in the keyword universe. Six are here. The routing rule from the workbook is explicit: four go standalone as their own Q&A pages ("what magnesium glycinate good for" at 2,900, "when to take magnesium glycinate" at 2,400, "how much magnesium glycinate should i take" at 1,900, "what does magnesium glycinate do" at 1,900) because they have real standalone volume. The rest attach here or nowhere.

The selection test. A question earns a row when it is genuinely about the form, has no home in the body copy, and is answerable in one paragraph. Anything that is really a magnesium question wearing a glycinate costume goes to the parent, or the FAQ becomes a second, worse copy of the parent page.

The bisglycinate question is deliberately first and open by default. It is the single highest-value clarification on the page, it prevents a duplicate-page problem, and it answers a confusion that 7,200 monthly searches prove is real. Leading with it also means the first thing a returning visitor sees is us resolving an ambiguity rather than selling.

The 500 mg answer refuses to give a number, and explains why. That is the correct answer, it is more useful than a false precision, and it routes to the elemental section and the parent's dose zones. Refusing to answer badly is itself a quality signal.

Mechanics. Content is in the DOM at load, not injected on click, so crawlers see all six. details and summary give keyboard and screen reader behaviour free. FAQPage covers exactly these six and the answer text matches verbatim.

Products using magnesium glycinate

Scored products whose label lists this form specifically, highest scoring first. Ordering is by SuppScore only. We have no commercial relationship with any brand shown.

Example BrandMagnesium Bisglycinate 400 mg92/ 100375 mg elemental · Zone 3 · no penalties Example BrandGlycinate Complex with B681/ 100300 mg elemental · Zone 3 · minor filler Example BrandMagnesium Glycinate Gummies44/ 100100 mg elemental · Zone 2 · gummy burden Example BrandSleep Support Blend38/ 10064 mg elemental · Zone 1 · buffered blend

Products · this grid is the argument the whole page has been making Four products, all using the same Tier A form, scoring from 92 to 38. Nothing demonstrates the model better. A reader who has just learned that glycinate is the best form could reasonably conclude that any glycinate product is a good buy. This grid corrects that in one glance, and the breakdown line under each score shows exactly why: elemental dose, zone, penalties.

The gummy at 44 sitting under the capsule at 92 makes the format section concrete without repeating it. Same compound, same tier, half the score.

The breakdown line is the difference between a score and a verdict. "44/100" invites scepticism. "100 mg elemental, Zone 2, gummy burden" invites agreement, and it seeds internal links to the dose zones and the excipient glossary.

Live build issues that carry over from the parent audit. The module copy says "Quality supplements using this ingredient form" while listing products scoring 1. The score scale is an unbounded sum, so 1 and 183 appear in the same list. Duplicate brand records exist. All three need fixing before this template ships, and the scale decision blocks Rating schema everywhere.

References

Walker AF, Marakis G, Christie S, Byng M. Mg citrate found more bioavailable than other Mg preparations in a randomised, double-blind study. Magnesium Research, 2003. PubMed
Schuette SA, Lashner BA, Janghorbani M. Bioavailability of magnesium diglycinate versus magnesium oxide in patients with ileal resection. JPEN, 1994. PubMed
Siebrecht S. Magnesium bisglycinate as a safe and well absorbed form of magnesium. OM & Ernährung, 2013.

References · three, and three is the honest number The parent page carries five references. This page carries three. That is correct, not a shortfall. These are the citations attached to the glycinate form rationale in our own data, and padding the list with general magnesium papers would be exactly the failure we criticised on the live build, where one NCBI URL appears four times to make a list of two look like five.

The completeness bar is doing real work here. A form child indexes only with a rationale carrying at least one citation and the promoted flag set. Glycinate clears it comfortably. The current data does not: the glycinate record has one reference and the TRAACS record has none, both inheriting from a shared boilerplate. Reference inheritance between aliased forms needs to be an explicit contract rule, not an accident.

Full citation format, and rel="nofollow" on outbound reference links. With around 500 promoted form pages eventually, unfollowed reference links keep several thousand outbound links from bleeding equity to PubMed.

Reviewed by [NAMED REVIEWER REQUIRED]

Registered Nutritionist, Association for Nutrition · Advisory board

Published 4 Mar 2026 · Last reviewed 31 Jul 2026

31 Jul 2026Elemental magnesium content added. Bisglycinate confirmed as an alias of this entity.
30 Jun 2026Tier A confirmed at the June form review. Multiplier unchanged at 1.5.
12 May 2026Siebrecht 2013 added to the absorption evidence.

E-E-A-T · the same reviewer, and the same blocker, on all 500 form pages One name unlocks this on every promoted form page, not just this one. Named reviewer, credential, awarding body, and a sameAs to a corroborable profile so a knowledge graph can verify the person exists independently of our claim about them. A name without corroboration is barely better than no name.

Update history is generated from pipeline events, not written. "Tier A confirmed at the June form review, multiplier unchanged" is a genuinely valuable entry: it shows the rating was re-examined and held, which is a stronger signal than a rating that has never moved because nobody looked. Rendered as list items with time elements, never as headings.

Deliberately broken in the reference build. A placeholder that looks finished is how placeholders ship.