Nutri Advanced Magnesium Review UK 2026

The number on a magnesium label is almost never the number that reaches your cells. Short answer: Nutri Advanced Magnesium Glycinate earns its price premium if you need the glycinate form specifically - and that verdict rests on what the label is not telling you. That gap between compound weight and actual elemental magnesium is where practitioner-grade brands either prove their value or charge more for the same confusion. My clinical practice has included Harrods’ Wellness Clinic, and my training at the College of Naturopathic Medicine earned me a Diploma in Nutritional Therapy. I spend a fair amount of time untangling supplement labels for clients who have been told to take magnesium but have no idea what they are swallowing. I reviewed this product through the Balance Journal Editor Lab protocol, which means independent assessment against defined criteria before any verdict is reached.

Nutri Advanced - now part of Metagenics UK - is one of the names that comes up regularly in practitioner circles. This review breaks down the specific magnesium glycinate product, checks what the label is telling you, and gives you a straight answer on whether it is worth the premium over a high-street alternative.

Nutri Advanced Magnesium Glycinate is a well-formulated supplement using bisglycinate, one of the most clinically recognised chelated forms for tolerability and absorption. The elemental dose per two-tablet serving sits around 200mg - meaningful against the UK reference intake of 270-300mg per day for adults, though most users will take it alongside dietary magnesium. At £23.99 for 120 tablets (60 servings), the cost per serving is £0.40, considerably higher than basic pharmacy options. If you need glycinate specifically - for tolerability, for sleep support, or because a practitioner has recommended it - the product suits that need. If you are buying magnesium for the first time without a specific reason for the glycinate form, the price gap deserves scrutiny.

Overall rating: 4/5. Strong form choice from a practitioner-background brand. The elemental dose per serving is moderate, not high - worth knowing if you are hoping to address a significant deficiency in one product alone.

Nutri Advanced was established in the UK as a practitioner-only supplement brand, meaning products were originally distributed through nutritionists, naturopaths, and integrated health practitioners rather than through retail channels. The brand has since been absorbed into Metagenics, a global clinical nutrition company headquartered in the United States with significant European operations now trading as Metagenics UK (metagenics.co.uk).

The Metagenics acquisition matters because the product is now sold direct through Metagenics UK. The product page says the tablets are back with brand-new packaging under Metagenics, and it lists them as Third Party Tested. The page shows no certificate of analysis, so that testing remains a claim from the brand.

For this review I use the familiar Nutri Advanced name, while noting that the product page now sits under Metagenics UK.

This is the section that matters most. Magnesium supplements come in several forms - magnesium citrate, magnesium oxide, magnesium malate, and magnesium bisglycinate are among the most common. Each form carries a different compound weight, different elemental magnesium content, and a different absorption profile.

The Nutri Advanced product uses magnesium bisglycinate, sometimes labelled as magnesium glycinate. These terms refer to the same chelated compound: magnesium bonded to two glycine molecules. Chelated forms are considered well-absorbed because the mineral is protected from competing ions in the digestive tract, which can interfere with uptake. The chelated magnesium structure also tends to produce less of the laxative effect associated with magnesium oxide and, to a lesser degree, magnesium citrate.

Here is where supplement labels regularly mislead well-intentioned buyers. A label that reads "Magnesium Bisglycinate 1,000mg" is telling you the weight of the whole chelated compound - the magnesium molecule plus its two glycine attachments. The actual elemental magnesium content of bisglycinate is only a small share of the compound weight, because glycine (an amino acid) makes up the majority of the molecular mass.

So what does that mean for Nutri Advanced?

The product provides approximately 200mg of elemental magnesium per two-tablet serving. This is the figure that matters for comparing against the UK reference nutrient intake (RNI). The NHS guidance, which cites the Department of Health and Social Care, sets the RNI for magnesium at 270mg per day for women and 300mg per day for men. A serving of two Nutri Advanced tablets contributes about 74% of the women’s RNI and about 67% of the men’s RNI - a large share of the daily figure, though not a full replacement for dietary magnesium from food sources such as green leafy vegetables, nuts, seeds, and wholegrains.

If your practitioner has recommended higher supplemental magnesium - common in protocols addressing sleep disruption, muscle cramps, or certain hormonal conditions - you would need to assess whether two tablets per day is the right dose for your specific situation. That conversation belongs with your GP or registered nutritionist, not on the back of a label.

Among the chelated forms, bisglycinate is frequently cited in clinical nutrition for sleep and stress applications. Glycine itself has been studied independently for sleep quality, and the glycinate form of magnesium delivers both the mineral and the amino acid in the same compound. For clients managing poor sleep or stress-related muscle tension, this is the form I would most often recommend over citrate or oxide - not because the evidence is overwhelming, but because the tolerability profile is consistently better and the glycine adds a second active ingredient.

The term "practitioner-grade" does not guarantee a specific elemental dose or independent testing - those require scrutiny on a product-by-product basis.

Nutri Advanced Magnesium Glycinate comes as tablets rather than capsules, which is worth flagging for pill-averse readers. The two-tablet daily serving means you are taking two of these per day, typically with food or in the evening before bed given the sleep-support application most buyers are targeting.

Tolerability is where this product earns its positive reputation. In my clinical experience, drawing on client feedback, magnesium bisglycinate produces significantly less digestive discomfort than oxide or high-dose citrate formulations. The laxative threshold for bisglycinate is considerably higher than for other common magnesium forms, which means that most people tolerate the standard two-tablet serving without the loose-stool side effect that puts many first-time magnesium users off supplementing entirely.

Some buyers taking three to four tablets daily - which some practitioners recommend for therapeutic magnesium repletion - have reported mild digestive awareness at the higher end, but this is not a common finding at the two-tablet standard dose.

On effect: I am cautious about attributing specific outcomes to a single supplement in a single review. What I can say is that glycinate-form magnesium at 200mg elemental per two-tablet serving, taken consistently in the evening, can be one part of a sleep and recovery protocol. The EFSA has authorised health claims for magnesium in relation to normal muscle function and the reduction of tiredness and fatigue - claims that rest on meeting adequate intake, not on any particular brand or form.

At £23.99 for 120 tablets (60 servings at two tablets per day), Nutri Advanced Magnesium Glycinate works out to £0.40 per serving or £12.00 per month. That sits meaningfully above pharmacy own-label magnesium oxide, which you can find for under £5 for a two-month supply, and modestly above mid-range high-street magnesium citrate from brands like Solgar or Nature’s Best.

The price differential is explainable, not arbitrary. You are paying for the bisglycinate form specifically, which costs more to produce than oxide or basic citrate, and the product page states the tablets are Third Party Tested, but it shows no certificate of analysis, so that testing is a claim from the brand. The British Dietetic Association notes that most people do not need supplements if eating a varied diet, though certain groups - including those with absorption issues - may benefit from targeted supplementation.

Is Nutri Advanced worth the premium? Against basic magnesium oxide, yes - the form difference is real. Against other glycinate-form products at similar price points, the comparison becomes tighter. A published certificate of analysis would make the case stronger.

For context on how this product compares to other glycinate-form magnesium supplements currently available in the UK, see our best magnesium supplement UK guide.

If you are weighing up glycinate against citrate - the two most commonly recommended forms - our magnesium citrate vs glycinate comparison covers the decision in full.

If you are comparing this against other supplement brands addressing magnesium and wider mineral health, it is also worth noting that a clean nutritional foundation matters - including the beverages you consume daily. Our guide to mycotoxin-free coffee covers why your morning coffee choice can affect your broader health routine: best mycotoxin-free coffee.