Five magnesium drinks you can buy in the UK, compared on the four things a label has to tell you: how much elemental magnesium is in a serving, which form it comes from, whether there is melatonin in it, and whether the brand publishes a dose for everything else in the blend. Two of the five do not.
Every figure below was read from the brand's own product page on 9 August 2026. Formulations and prices change, so check the current label before you buy.
| Drink | Elemental magnesium per serving | Magnesium form | Melatonin | Other actives, and whether the dose is published |
|---|---|---|---|---|
| BetterYou Magnesium Max Sleep Powder, 30 servings, 5 g into hot milk | 375 mg | Glycinate, citrate and malate, not broken out | None | Passionflower extract 200 mg. Cocoa powder, no dose published. |
| Evopure Magnesium Sleep Blend Powder, one teaspoon, about 4.2 g | 148 mg | Bisglycinate and citrate | None | L-theanine, glycine, avena sativa, hops, chamomile, passionflower. No per-ingredient dose on the product page. |
| Hour Seven Magnesium Sleep Drink Powder, 30 servings, 7 g into 200 ml hot or cold water | 200 mg | Bisglycinate only | None | Glycine 3,000 mg, acacia fibre 1,300 mg, tart cherry 400 mg, ashwagandha root extract 300 mg, L-theanine 200 mg, zinc 14 mg, vitamin B6 2 mg. Every dose published. |
| Moon Juice Sleepy Magnesi-Om Powder, 35 servings | 200 mg | Bisglycinate 170 mg, gluconate 30 mg | Yes, 0.3 mg plant-derived | L-theanine 112 mg. Doses published. |
| Vilgain Magnesium Drink Powder, 325 g tub, sold by weight | Not stated per serving on the product page | Glycinate | None | None. Flavoured magnesium on its own. |
The high-street option, stocked in Boots, and the only one here built to go into hot milk rather than water. It carries the most magnesium per serving by a wide margin. It does not say how much of the 375 mg comes from glycinate, which is the thing you are choosing if glycinate is why you are buying.
The longest ingredient list of the five and the least quantified. Six named actives beyond the magnesium, and no milligram figure against any of them, so there is no way to tell a working dose from a pinch. The lowest elemental magnesium here as well.
Ours, and the reason this page exists. It is the only drink here with a milligram figure printed next to all eight actives, which is the one thing you cannot check on most of the others. The 200 mg of magnesium is mid-table rather than the highest, and all of it is bisglycinate rather than a blend of forms.
The only one here with melatonin in it, at a microdose. Dose transparency is good, down to the split between the two magnesium forms. It is a US brand, so check that it ships to you and what delivery and customs add before you order, and note that a food supplement sold in the UK could not contain the melatonin this one does.
The cheapest per gram and the simplest thing on the list: flavoured magnesium glycinate with nothing else in it. The page says a serving covers the full daily intake but does not print the milligrams, and it is sold by weight rather than by serving, so you have to do the cost-per-night arithmetic yourself.
Hour Seven wrote this page and sells one of the five drinks on it. That is why the comparison is limited to figures you can read off each brand's own label, why nothing here is ranked, and why every product links out to its own page so you can check it yourself. These are food supplements, not medicines. They do not diagnose, treat, cure or prevent any disease or medical condition.
Before you choose
The things worth knowing that a product page will not tell you.
Magnesium bisglycinate is magnesium bound to glycine, and it is the form most often chosen for an evening drink because it is gentle on the stomach and easy to keep taking. Magnesium citrate has a laxative effect at higher intakes, which is why it tends to appear as part of a blend rather than on its own. Neither form carries an authorised sleep claim in the UK. Magnesium contributes to normal functioning of the nervous system and to normal psychological function, whichever form it comes in. If a product blends forms without saying how much of each, you cannot tell which one you are mostly taking.
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