10 Reasons NF Magnesium Is The Best Magnesium In The UK.

Every single batch is tested by an outside lab before we'll ship it.

Most brands send one batch to a lab when they launch, post the certificate on Instagram, and then quietly stop. We test every batch. If a batch comes back under-dosed, over-dosed, contaminated, or off-spec — it doesn't leave the warehouse. Full stop.

It's 100% pure magnesium bisglycinate. No buffer. No oxide. No "blend" tricks.

Pick up any "Magnesium Glycinate" from the supermarket or Amazon. The number on the front is almost certainly inflated with hidden magnesium oxide — the cheapest form available, which your body absorbs about 4% of. We don't do that. Every capsule is pure magnesium bisglycinate, full stop. Here's the proof from Nutrition Geeks — the UK's best-selling supplement on Amazon — using their own label numbers:

Our formula doesn't have a gap. What's on the label is what's in the capsule.

We 3rd-party tested the competition. None of the labels matched the contents.

We bought two bottles of each of the top 5 best-selling magnesium supplements on Amazon UK. One bottle went to an ISO-accredited lab. The other got locked in the office in case anyone wanted to argue.

Almost every one was buffering with cheap magnesium oxide to inflate the elemental number on the front of the bottle — even the £30 "premium" brands. The ones that don't buffer simply under-dose you instead. Not one is a full, honest dose of pure magnesium glycinate like NF.

338mg of elemental magnesium — 90% of your daily RI in a single serving.

Magnesium lives in spinach, pumpkin seeds, dark chocolate, almonds and black beans — but you'd need a serious daily plate to hit 90% of your RI from food alone. The image on the left shows what an average day would have to look like to match one NF serving.

Four capsules. Once a day. No prep, no bloat, no chasing magnesium across five food groups.

Up to 10× better absorption than supermarket magnesium.

Bisglycinate is the form your body actually uses — gentle on the stomach, famously well-tolerated. Oxide is what most cheap brands hide inside their "premium glycinate" capsules.

Because it's absorbed better, you get the benefits.

Magnesium is a co-factor in over 300 enzyme reactions in the human body — but only the part you absorb does the work. A full, properly-absorbed dose of magnesium supports:

Most magnesium on Amazon delivers only a few mg of usable magnesium per serving. NF delivers the full 338mg — every capsule, every batch.

Made in our own GMP-certified facility in Kidlington, Oxford.

Most "British" magnesium brands buy a finished product from a contract manufacturer, slap a label on it, and call it premium. They've never set foot on the line. We own the packing line. We hire the staff. We control the ingredients. We answer the phone.

When something goes wrong, you don't get bounced through a customer service queue in another country. You get me.

Bisglycinate is the gentlest form of magnesium on your stomach.

No laxative effect (that's citrate). No metallic aftertaste (that's oxide). Bisglycinate binds magnesium to glycine — an amino acid that's calming on its own — which is why people who take it before bed wake up less and feel more rested in the morning.

No 3 a.m. trips to the bathroom. No sour stomach. Just magnesium your body can actually use.

60-day money-back guarantee. Empty bottles welcome.

You don't feel a magnesium deficiency overnight — and you don't fix one in three days, either. Give it 30 days. If you're not sleeping deeper, cramping less, and feeling calmer in your nervous system by day 60 — send the empties back. We'll refund every penny.

Buy 2, get 1 free. AND a free bottle of D3 + K2 in every order.

Magnesium, D3 and K2 aren't three separate supplements — they unlock each other. Magnesium activates vitamin D. D3 drives calcium absorption. K2 routes that calcium to your bones, not your arteries. Take any one without the others and you're leaving most of the work on the table.

So today we're throwing the full stack in: buy 2 bottles of NF Magnesium, get the 3rd free (90 days of magnesium for the price of 60), AND a free bottle of NF D3 + K2 in every order.

Today only. When this batch sells out, the stack goes back to full price.