GLOW Standard · Wellness · Sleep
Four formulas the wellness desk kept reaching for at week six. Magnesium glycinate first, an adaptogen second, and the one we will not rank.
Onset · wind-down
BioCeuticals UltraMuscleze Night
The practitioner-grade night powder.
Daily · budget
Ethical Nutrients Mega Magnesium Powder
Honest single-form magnesium glycinate in a dose the body can actually hold onto.
Stress · wind-down
KSM-66 (practitioner brands) Ashwagandha, 600mg
Not a sedative.
The verdict Winner: BioCeuticals UltraMuscleze Night · Glow 9.1/10 · Read the brand profile →
The verdict
Buy BioCeuticals UltraMuscleze Night at AU$65. GLOW Score 9.1. It is a practitioner-grade magnesium glycinate powder dosed alongside glycine, L-theanine and B6 at the levels the clinical literature uses, not the levels a marketing brief settled on. If you only want the magnesium, the cheaper Ethical Nutrients Mega Magnesium Powder at AU$42 (GLOW Score 8.6) is the everyday default.
The category trap is OTC melatonin. It is a scheduled medicine in Australia for a reason. We do not rank it, and we do not recommend imported gummies in its place.
In the room with us
Three of the six panellists wore an Oura Ring for the full six weeks. We treated it as a tiebreaker, not a verdict, sleep is too contextual to outsource to a wearable. What the data did do, cleanly, was tell us when a supplement was shortening sleep-onset without lifting deep-sleep time, which is the difference between a real result and a placebo we like the taste of.
Editorial note · Oura is not paying for placement here.
The ranking
Magnesium glycinate first and second. One adaptogen for the wind-down. One herbal blend for the occasional broken Sunday. Nothing else made the cut.
BioCeuticals
The practitioner-grade night powder. Magnesium glycinate, glycine, L-theanine and B6 in doses that match the clinical literature, not a marketing brief. Onset shifted earlier from week two onward across five of six panellists. The one our naturopath-trained editor restocks.
Stocked at Chemist WarehouseEthical Nutrients
Honest single-form magnesium glycinate in a dose the body can actually hold onto. No theanine support, no clever blending, which is the point. The panel's repurchase rate at week six was almost identical to BioCeuticals at two-thirds the price. The everyday default.
Stocked at Chemist WarehouseKSM-66 (practitioner brands)
Not a sedative. KSM-66 at 600mg/day shortened the panel's subjective wind-down time and softened pre-bed rumination after week three. Pair with a magnesium glycinate. On its own it will not put you to sleep, it makes sleep easier to fall into. Cycle six weeks on, two off.
Full ashwagandha rankingSwisse
Valerian, passionflower and hops. The pharmacy-aisle default. Mild but real for occasional broken sleep; not the formula we would build a nightly routine around. Useful as a holiday-Sunday-night reset when you would rather not start a six-week mineral course.
Stocked at Chemist WarehouseHow we tested
A sleep supplement earns a spot only if all six panellists keep reaching for it past week three. GLOW editorial team signs off the read-out.
Nightly use, weeks 0, 3 and 6 scored. A formula has to be wanted at week six, not just tolerated. Three panellists wore the Oura Ring across the window.
Ages 27 to 54. Two managing perimenopause-pattern wake, one rotating night shifts, one in heavy training load. Caffeine cut-off held at 2pm across the test.
A supplement cannot rank above 8.0 without dose-disclosed actives at or above the clinical evidence floor. No paid placement.
Field note
The most overhyped product in the Australian sleep category right now is over-the-counter melatonin. It is sold on TikTok in 5mg and 10mg gummies imported from the US, and it is a scheduled medicine here for a reason, dose, timing and circadian phase all matter, and the wrong combination disrupts sleep architecture more than it helps. If melatonin is the right tool for your sleep, see a GP. We do not rank the gummies, and we will not pretend "low dose" makes them safer when the dose on the back of the jar is six times what a sleep physician would prescribe.
The most underrated product is humble magnesium glycinate. It does not have a brand story, it does not photograph well, and it costs less than a Mecca eyeshadow. It also does, for a startling proportion of adults, the actual thing the category claims: it shortens sleep-onset and improves the quality of the first sleep cycle. Ethical Nutrients and BioCeuticals make the two we keep on hand.
What is honestly fine: KSM-66 ashwagandha for the wind-down, L-theanine if you cannot quiet your head, the Swisse herbal blend for the occasional Sunday. What we would skip: proprietary "sleep stack" gummies with undisclosed doses, weighted sleep masks that need a battery, and any supplement priced above $90 unless your GP wrote it down.
High-evidence-and-OTC is where both Glow picks live. Anything in the bottom-left quadrant, OTC melatonin gummies, magnesium oxide, we will not rank.
BioCeuticals UltraMuscleze Night at AU$65 is GLOW's editor pick for 2026 (GLOW Score 9.1). It is a practitioner-grade magnesium glycinate powder with glycine, L-theanine and B6 at doses that match the clinical literature. Ethical Nutrients Mega Magnesium Powder at AU$42 (GLOW Score 8.6) is the cheaper everyday default if you only want the magnesium.
Magnesium glycinate. It is bound to the amino acid glycine, which is itself sleep-supportive, and is the most bioavailable form available in Australia. Avoid magnesium oxide, it is cheap, poorly absorbed, and the reason a lot of supermarket magnesium gives people loose stools instead of sleep.
Melatonin is a scheduled medicine in Australia for a reason. The TGA restricts it to pharmacist or prescription supply because dose, timing and circadian phase all matter and the wrong combination can disrupt sleep architecture more than it helps. We will not rank imported gummies sold online. If melatonin is the right tool, see a GP.
Not as a sedative. KSM-66 ashwagandha at around 600mg daily lowers subjective evening stress and shortens the time it takes to wind down. Pair it with a magnesium glycinate. On its own it does not put you to sleep, it makes sleep easier to fall into.
Thirty to sixty minutes before bed. Magnesium glycinate and L-theanine work fastest; ashwagandha is a tonic-effect supplement and needs three to four weeks of nightly use before the benefit reads. Blend formulas like BioCeuticals UltraMuscleze Night sit cleanly inside that window.
The four we rank, magnesium glycinate, KSM-66, L-theanine and the Swisse valerian-passionflower blend, are not habit-forming and do not produce tolerance the way OTC sedatives do. We still recommend cycling adaptogens (six weeks on, two weeks off) and treating supplements as a floor under your sleep hygiene, not a substitute for it.
Annually, and any time a ranked formula reformulates. This edition was last updated 3 June 2026 by GLOW editorial team.