My verdict: acceptable as a blend, not as pure bisglycinate
Granions magnesium bisglycinate also contains marine magnesium oxide. My opinion is therefore guarded if you are looking exclusively for bisglycinate: the French product page consulted does not quantify the split between the two sources. The name of the form alone does not tell you what is in the tablet.
The product examined here is the 360 mg, 60-tablet version, not the entire range. This analysis covers public information and prices recorded on 21 October 2026. I have neither personally tested the product nor had a batch analysed. This is an independent desk-based review, with no affiliate links.
To separate the merits of the form from those of this brand, keep our guide magnesium bisglycinate: review, evidence and limitations as a reference. Here, the question is more specific: what are you paying for, at what dose, and with what unanswered questions?
Exact ingredients: what Granions declares
The official French product page lists the following ingredients, grouped without changing their identity:
- Mineral sources: magnesium bisglycinate with citric acid as an acidifier, followed by marine magnesium in oxide form.
- Matrix and anti-caking agents: hydroxypropyl methylcellulose, microcrystalline cellulose, tricalcium phosphate and magnesium stearate.
- Vitamin: B6.
- Film coating: hydroxypropyl cellulose, hydroxypropyl methylcellulose, talc, calcium carbonate and spirulina extract.
The nutrition table states 360 mg of magnesium and 2 mg of B6 per two tablets, which, by division, means 180 mg and 1 mg per tablet. The 360 mg refers to total elemental magnesium from both sources, not the weight of the bisglycinate or its individual contribution.
This detail changes the comparison. We know the total amount of the mineral, but not how much each salt provides. Adding the sources together is valid. Attributing the entire total to bisglycinate is not.
Differences between product pages that should not be glossed over
The manufacturer’s English-language page contains a different list, notably mentioning maltodextrin and silica with a nano designation. This does not establish that these ingredients are present in the current French batch. Conversely, the French list cannot certify their absence from every version sold.
The right answer is therefore neither “it definitely contains them” nor “it never contains them”. Check the physical label and, if it differs from the product page, ask the manufacturer which composition matches the batch number. If you are sensitive to an ingredient, make this check before buying.
I use the French product page to describe the formula reviewed. This editorial decision does not replace checking the box at the pharmacy. A commercial product page is a seller’s declaration, not an independent analytical certificate.
Bisglycinate, oxide and additives: why they matter
Magnesium contributes to energy metabolism and neuromuscular function, as noted in the NIH fact sheet. Bisglycinate combines the mineral with glycine. Oxide is another source of magnesium. After ingestion, the amount absorbed depends on the formulation and digestive conditions: the number on the box is not a guaranteed amount reaching your tissues.
The presence of oxide does not make the blend worthless. Above all, it prevents us from automatically assigning it the qualities expected of an exclusively bisglycinate formula. A high elemental content does not demonstrate better absorption, and good absorption alone does not demonstrate better sleep.
As for excipients, I do not turn a long list into a health indictment. Here, the manufacturer classifies them as thickeners, anti-caking agents or film-coating components. They serve formulation purposes. Their presence matters mainly to anyone wanting to limit ingredients or identify a known intolerance.
Magnesium stearate is listed as an anti-caking agent: it is not a third form to count as an efficacy selling point. Calcium carbonate is listed as a colourant: that mention alone does not make the product a calcium supplement. Reading a label means distinguishing an ingredient’s function from its chemical name.
My first buying criteria would be transparency about the salts and tolerance at the chosen dose. I would not pay more just because the list looks “technical”. A manufacturer can make a sophisticated tablet without having demonstrated greater clinical benefit than a simpler capsule.
Fatigue, stress, sleep: what evidence is there for this product?
Magnesium’s normal biological role does not mean that everyone who feels tired is short of magnesium. If your intake is inadequate, correcting it makes sense. If fatigue stems from insufficient sleep, a medical problem or an excessive workload, choosing a more expensive salt does not automatically address the cause.
Our guide to possible signs of low magnesium · FR explains why symptoms alone cannot establish a deficiency. This starting point guards against a common mistake: treating spontaneous improvement as confirmation of a diagnosis that was never made.
On sleep, the meta-analysis by Mah and Pitre published in 2021 included three trials and 151 older adults. It reported an average reduction in sleep onset latency of about 17 minutes, with low- to very-low-quality evidence. This finding concerns specific interventions and a specific population, not validation of the Granions blend. This older review is also not an inventory of every trial published since.
In the sources consulted, I did not identify a comparative trial of the finished product demonstrating superiority over another bisglycinate for stress or sleep. That does not prove it is ineffective. It does rule out selling its superiority as established.
The same caution applies to the brand’s prolonged-release claim. A release property must be distinguished from a patient outcome: fewer awakenings, less fatigue, better tolerance. Without a relevant comparison of the finished product, I give it no clinical bonus points.
Daily cost: do the maths before the promotion
At the time prices were recorded, the size reviewed cost €17.40 for 60 tablets. At the manufacturer’s serving of two tablets, that covers 30 days and costs €0.58 per day, excluding delivery and discounts. The calculated cost of one tablet is €0.29; this calculation is not a dosage recommendation.
To compare packs fairly, you need to distinguish two questions. Daily cost tells you what you spend at the suggested serving. Cost per amount of elemental magnesium allows comparison of magnesium content. Neither measures the price of an amount actually absorbed: we do not have that information.
Here is a price snapshot of smaller packs on the official websites, excluding shipping, subscriptions and promotions:
| Product | Pack size and price | Listed serving | Elemental magnesium | Cost/day | Cost per 100 mg of elemental magnesium |
|---|---|---|---|---|---|
| Granions bisglycinate 360 | 60 tablets, €17.40 | 2 tablets | 360 mg | €0.58 | €0.16 |
| Nutripure magnesium bisglycinate | 60 capsules, €14.90 | 2 capsules | 240 mg | €0.50 | €0.21 |
| Nutrimuscle Magnesium Complex | 60 capsules, €19.95 | 2 capsules | 264 mg | €0.67 | €0.25 |
Reproducible calculation: pack price divided by the number of servings, then cost per serving multiplied by 100 and divided by the milligrams of elemental magnesium. Values are rounded after calculation. These are comparison units, not an invitation to split tablets or exceed the package instructions.
A different pharmacy price changes the results. Use the amount actually paid, including delivery if needed. A discount on a larger pack can change the cost ranking without changing a single property of the formula.
Watch out for the Granions economy pack
The Marine Magnesium + Bisglycinate six-month pack is a different product: 180 tablets, €25.90, one tablet per day, with a stated 360 mg of magnesium and 2 mg of B6. Its ingredient list places marine magnesium in oxide form before bisglycinate. Its cost works out at around €0.14 per day, excluding delivery.
That price is much lower, but this is not simply the same product in a bigger box. Do not transfer the tablet count or instructions from one product to the other. A quick search for the brand name can mix up these two products and produce a wrong calculation despite perfectly correct division.
To compare the economy pack with the product reviewed, we would also need to know each source’s elemental contribution. The price does not fill that information gap. If you ask for advice at a pharmacy, show the specific box or a photograph rather than just asking for “Granions bisglycinate”.
Comparing ingredients: the alternatives are not all pure either
The current Nutripure ingredient list declares buffered bisglycinate, consisting of 80% bisglycinate and 20% oxide, with taurine, a pullulan capsule shell, coconut flour and B6. These percentages describe the stated blend, not the share of elemental magnesium supplied by each salt. Its advantage in terms of documentation is that it quantifies this split. It is not an oxide-free alternative.
The Nutrimuscle Magnesium Complex combines sea lettuce extract, pidolate, citrate and Albion bisglycinate, with a pullulan capsule shell. It is a complex containing bisglycinate, not bisglycinate alone. Multiple sources do not demonstrate a better clinical outcome either.
To look for an exclusively bisglycinate formula, use our brand comparison checklist · FR. Insist on a complete ingredient list and confirmation that there is no other source if the description remains ambiguous. The word “chelated” on the front does not answer that question.
Tolerance and dose: the main point to watch
The EFSA summary of upper limits gives a benchmark of 250 mg per day for magnesium from readily dissociable salts and compounds such as oxide, supplied notably by supplements. Magnesium naturally present in food is excluded from this benchmark. It is neither a nutritional target nor an automatic toxicity threshold.
The full serving reviewed exceeds this benchmark. That warrants discussing its suitability with a pharmacist, especially if other products already provide magnesium. Do not stack up milligrams on the grounds that each box, taken separately, follows its own instructions.
The NIH describes diarrhoea, nausea and abdominal cramps with supplements. Claims of excellent digestive tolerance therefore do not guarantee your individual tolerance. If problems occur, stop taking it and have the dose, combined intake and formulation checked rather than persisting just to “finish the course”.
Renal impairment increases the risk of accumulation: do not self-supplement in this situation. Also seek advice if you are pregnant, breastfeeding, have a chronic condition or are under 18. Tetracyclines, quinolones and oral bisphosphonates can interact with magnesium. The pharmacist should specify the spacing required for the particular medicine rather than applying a universal interval.
Finally, add up the B6 in your different supplements. EFSA sets an adult upper limit of 12 mg per day for total intake, notably because of the risk of neuropathy. The presence of B6 is no justification for stacking anti-stress formulas.
Buy, compare or pass
I would choose this blend only if supplementation is justified, the exact formula is suitable and its cost remains competitive at the price actually paid. For a reader looking for bisglycinate alone or who tolerates oxide poorly, I would favour another well-documented product.
Before starting, choose an observable goal and a review date. A daily fatigue score or estimated time to fall asleep can help you decide whether the expense is worth continuing. This personal tracking does not prove a causal effect and does not replace an assessment if symptoms persist.
Review things after two to four weeks with the professional who recommended supplementation. Do not change all your supplements and habits at once if you want to interpret how you feel. Without a noticeable benefit, automatically buying another tub is mainly an experiment on your budget.
To decide whether another form better suits your needs, consult the comparison of magnesium forms · FR. The best choice may also be to improve your diet or investigate persistent fatigue before buying anything.
