The sleepy girl mocktail

What is the sleepy girl mocktail?

A three-ingredient bedtime drink that spread on TikTok: tart cherry juice, magnesium powder, and a splash of prebiotic soda or sparkling water. ABC News, writing in January 2024, credited a video posted in March 2023 by the wellness creator Gracie Norton, which had passed 1.5 million views (McCarthy, 2024).

The recipe ABC printed uses half a cup of tart cherry juice and a tablespoon of magnesium powder. The idea is that the cherries bring melatonin and the magnesium brings calm. We could not find a published study of the drink itself, or of the two ingredients taken together (searched October 2026) — so what follows is the evidence for each part.

Does tart cherry juice help you sleep?

A little, in a few small studies. Three placebo-controlled trials have tested it directly:

A 2025 review found 7 intervention studies in all. Three reported better sleep on some measure, and the reviewers judged the evidence limited and too varied — in doses, lengths and people — to be sure (Barforoush and colleagues, 2025).

The authors of the 2010 trial put it plainly: the effects were modest, and considerably smaller than those of sleeping pills or of cognitive behavioural therapy for insomnia (Pigeon and colleagues, 2010).

Is it the melatonin in the cherries?

Probably not much of it. Tart cherries do contain melatonin: about 13.5 nanograms per gram of fresh Montmorency cherries, in a 2001 analysis (Burkhardt and colleagues, 2001). At that concentration, the 0.5 mg at the bottom of the range that worked in the jet-lag trials (Herxheimer and Petrie, 2002) would take more than 35 kilograms of fruit.

Juice and concentrate are not fresh fruit, and the 2012 trial did find more melatonin in the urine, so something gets through. But a glass of juice is not a melatonin tablet — and what a melatonin tablet does is less than its reputation.

The 2018 trial suggested a different route. In laboratory cells, a compound in the juice blocked an enzyme that breaks down tryptophan, a building block of serotonin and melatonin, and blood tests in the trial pointed the same way. The authors propose it may be part of the effect (Losso and colleagues, 2018); it has not been tested as the cause.

Does the magnesium do anything?

Possibly a little, for some people. The trials are few and of low certainty, and a 2026 review of 12 of them found that they do not support magnesium as a routine treatment for insomnia (Lopresti and colleagues, 2026). Magnesium for sleep goes through the trials and the forms.

Two things are specific to the drink. A tablespoon of powder is a measure of volume, not of magnesium: how much you get depends on the product, and the figure on its label for elemental magnesium is the one to set against the upper limit for supplements — 350 mg a day for adults in the US (NIH Office of Dietary Supplements), and 250 mg in the European Union (EFSA, 2025). And the magnesium in the drink adds to any you already take in supplements, antacids or laxatives.

Is it the drink or the ritual?

Possibly the ritual. A drink made the same way at the same time every night is a cue that the day is over, and the body clock rewards regularity: a schedule that shifts by hours at the weekend shifts the clock with it (light is the clock). A bedtime routine for adults is about building exactly that kind of evening.

It also takes the place of things that work against sleep. A mocktail is not a nightcap: alcohol shortens the time it takes to drift off and then breaks up the second half of the night (alcohol is a sedative, not a sleep aid). And cherry juice and sparkling water carry no caffeine, unlike an evening cup of tea or a cola.

Expectation is part of any bedtime drink, too. In insomnia trials, people given a placebo improve as well — by roughly two-thirds as much as people given the real medicine, across 32 drug trials (Winkler and Rief, 2015). That is not a reason to dismiss the ritual, but it is a reason not to credit the cherries with everything.

The drink belongs to a larger habit of stacking up sleep routines; sleepmaxxing looks at which of them hold up.

Who should skip it or ask first?

• Anyone watching their sugar. Fruit juice counts as free sugar even when it is unsweetened, and the NHS suggests no more than 150 ml of juice and smoothies a day in total, within 30 g of free sugars for adults (NHS, 2023). Half a cup comes close to that limit; the 2018 trial’s 240 ml twice a day was more than three times it.
• People with kidney disease, because the kidneys are what clear excess magnesium (NIH Office of Dietary Supplements).
• People on regular medicines. Magnesium interferes with some antibiotics and osteoporosis drugs, and some diuretics and reflux medicines change magnesium levels (NIH Office of Dietary Supplements). Ask a pharmacist.
• Children. The magnesium powder is a supplement, and young children’s limits are lower than adults’: in the US, 65 mg a day at 1 to 3 years and 110 mg at 4 to 8, rising to the adult 350 mg from 9 (NIH Office of Dietary Supplements). The European Union’s 250 mg applies from age 4 (EFSA, 2025).

Sleep supplements: what the evidence shows has the same questions for the rest of the shelf.

When is it more than a bad night?

When it happens most nights for months, or starts to affect your days. In the 2018 cherry trial, 3 of the 11 volunteers with insomnia were excluded because they had sleep apnoea, and were referred for care (Losso and colleagues, 2018) — a reminder that poor sleep can have causes a drink will not reach.

For chronic insomnia, the recommended first treatment is cognitive behavioural therapy for insomnia, CBT-I (Qaseem and colleagues, 2016; Edinger and colleagues, 2021).