Does magnesium glycinate cause vivid dreams?

No effect on dreaming, and the recall mechanism that explains every report

Does magnesium glycinate cause vivid dreams is answered no by the mineral and yes by the mechanism of remembering, and the second is the interesting half. The mineral: magnesium has no sedative effect, no effect on sleep architecture in any trial that measured it, no known action on REM sleep, the stage in which most vivid dreaming occurs, and no claim touching sleep or dreams, the sedation-test pages' absences, so a capsule of bisglycinate at the evening meal does nothing to what a sleeper dreams that night. The mechanism of remembering is where the reports come from, and it is well established: dreams are remembered mainly when a sleeper wakes during or shortly after a period of REM sleep, and are otherwise lost within minutes, so dream recall depends less on what was dreamed than on when and how often the sleeper woke, a person who wakes three times in a night from REM remembering three vivid dreams and a person who sleeps through remembering none, with the dreams themselves the same. Anything that changes the number or timing of awakenings changes recall, and starting a magnesium habit changes several things at once: a new bedtime ritual and a new bedtime shift the sleep cycle's timing against the alarm, a reader newly attentive to sleep sleeps a little lighter for a week and wakes more, a reader on citrate or oxide rather than glycinate is woken in the small hours by the bathroom trip that lands them mid-REM with a dream in hand, and a reader who read on a forum that magnesium causes vivid dreams goes to bed intending to notice them, which is the single strongest known lever on dream recall, attention, the dream-diary studies finding that simply intending to remember dreams multiplies recall within days. Every one of those raises recall without touching the dreams, and together they are the vivid-dream report.

The folklore the reports borrowed, what a reader can do if they want fewer or more, and the question filed

The folklore the reports borrowed belongs to a different nutrient: the vivid-dream story attached itself to magnesium through ZMA, whose classic formula contains vitamin B6, and B6's dream reputation comes from a small trial in which 250mg of pyridoxine at bedtime increased dream vividness and recall, a dose many times the 10.5mg in ZMA and unrelated to the magnesium beside it, so the story migrated from a high-dose vitamin in a formula to the mineral that shares the formula and then to magnesium taken alone, the ZMA pages' tracing, and a glycinate capsule with no B6 in it inherits a reputation it never earned. The glycine, since readers ask, is a few hundred milligrams of an amino acid the body makes in grams and has no dream effect at that dose. A reader who wants fewer vivid dreams takes the capsule earlier with dinner rather than at the pillow, so the ritual is not a bedtime ritual, switches from citrate or oxide to bisglycinate if a bathroom trip is doing the waking, stops reading about dreams, and waits a fortnight for the new-habit lightness to settle, after which recall returns to its baseline; a reader who likes them keeps a notebook by the bed, which raises recall more than any capsule could. A reader whose vivid dreams are nightmares, new, frequent and distressing, has a sleep question with causes from stress and alcohol to medicines and sleep disorders, and a GP rather than a supplement. The question filed: magnesium glycinate does not cause vivid dreams, having no effect on dreaming, and the reports come from the recall mechanism, more or differently timed awakenings and attention paid to dreams, with the folklore borrowed from a high-dose B6 trial, and the worked example being a capsule that changes nothing about the night but the ritual, bisglycinate at 300mg elemental with the evening meal, £19.99 for 90 days at 22p.

The verdict, the same dreams remembered more, for reasons that are not the mineral

Does magnesium glycinate cause vivid dreams: no, magnesium having no sedative, sleep-architecture or REM effect at any dose and no claim touching sleep, so the dreams a sleeper has after a capsule are the dreams they would have had anyway, with the reports explained by the recall mechanism, dreams being remembered mainly when a sleeper wakes during or shortly after REM, and a new bedtime ritual, a week of lighter sleep, a citrate's small-hours bathroom trip and above all the attention a forum's story supplies all raising recall without changing a dream, the folklore itself borrowed from a high-dose vitamin B6 trial that has nothing to do with magnesium. A capsule that changes nothing about the night but the ritual: Futuro Labs Magnesium Glycinate, bisglycinate, two capsules with the evening meal, 300mg elemental at 80% NRV, £19.99 for 90 days at 22p a day.

What to check on the label

Questions people also ask

Why do I have vivid dreams since starting magnesium?

Because you remember more of the dreams you were always having: dream recall depends on waking during or after REM, and a new bedtime ritual, a week of lighter sleep, a citrate's bathroom trip or simply intending to notice dreams because a forum said to all raise awakenings or attention without changing the dreams.

Does magnesium affect REM sleep?

Not in any trial that measured sleep architecture, and magnesium has no sedative or arousal effect at any dose, so the stage in which most vivid dreaming occurs is untouched by a capsule.

Where does the magnesium vivid-dream story come from?

From vitamin B6: ZMA's classic formula contains B6, and B6's dream reputation comes from a small trial at 250mg of pyridoxine at bedtime, many times ZMA's 10.5mg, so the story migrated from a high-dose vitamin to the mineral beside it and then to magnesium taken alone.

How can I stop vivid dreams on magnesium?

Take the capsule with dinner rather than at the pillow so the ritual is not a bedtime one, switch from citrate or oxide to bisglycinate if a bathroom trip is waking you, stop reading about dreams, and wait a fortnight for the new-habit lightness to settle.

When are vivid dreams a problem worth seeing a doctor about?

When they are nightmares, new, frequent and distressing, or come with sleep disruption, since causes run from stress and alcohol to medicines and sleep disorders, none of which a supplement page addresses.

Sources

1. The dream recall literature: dreams are remembered mainly when a sleeper wakes during or shortly after REM sleep, so anything that changes the number or timing of awakenings, a new bedtime routine, a bathroom trip, lighter sleep or attention paid to dreams, changes recall without changing the dreams. PubMed record
2. The vitamin B6 and dreaming literature: a small trial reported increased dream vividness and recall with 250mg of pyridoxine before bed, a dose many times the B6 in a ZMA serving, the origin of the vivid-dream anecdote. PubMed record
3. The expectation and sleep literature: placebo responses in insomnia trials are substantial and rapid, subjective sleep improving within nights of starting an inert treatment the sleeper believes in. PubMed record
4. Abbasi B, et al. The effect of magnesium supplementation on primary insomnia in elderly: a double-blind placebo-controlled clinical trial. Journal of Research in Medical Sciences 2012;17(12):1161-1169. PubMed record

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