Does the 'sleepy girl mocktail' actually work for sleep?
The viral drink pairs tart cherry juice with a magnesium supplement. Both have some human trial data for sleep, but it is thin, small and low-quality — far short of what the trend implies.
Magnesium supplements: real for blood pressure, oversold for the rest
Pooled trials show a genuine but small fall in blood pressure, around 2 mmHg. The bigger pitches — sleep, cramps, energy, anxiety — run ahead of the evidence.
Do you need a magnesium supplement? What the signs of a real shortage actually are
True dietary magnesium shortage in healthy people is rare, and reference guidance does not currently advise supplements. The clear deficiencies come from illness, alcohol and certain drugs, not a missed daily pill.
Does magnesium actually help you sleep? What the newest review found
Magnesium is one of the most popular over-the-counter sleep aids, but a 2026 review of the randomised trials concluded the evidence does not support it as a routine treatment for insomnia.
A new magnesium trial found real cognitive gains and a sleep signal too soft to call a win
Participants on Magtein scored better on memory and reaction-time tests after six weeks. On sleep — the reason most people buy it — an Oura Ring found no measurable difference at all.