Medical disclaimer: SnoozeVerdict summarizes what people say about sleep supplements on Reddit. It is not medical advice, and nothing here is meant to diagnose, treat, cure, or prevent any disease. These statements have not been evaluated by the Food and Drug Administration. Talk to your doctor or pharmacist before starting a supplement, especially if you are pregnant, take medicines (including sleep or mood medicines), or have a medical condition. Poor sleep that lasts for months, loud snoring or gasping at night, or falling asleep during the day while driving or working needs a doctor, not a supplement. Full disclaimer.

Question · Falling asleep

Does magnesium help you fall asleep?

Many say yes, going by Reddit owner reports: 37 of 41 rated comments from people who struggle to fall asleep describe a good experience with Magnesium, and 3 describe a poor one. That is self-reported experience, not proof that it works, and results vary from person to person.

Magnesium, Falling asleep	Owner comments
Rated comments in this context	41
Positive	37 (90%)
Negative	3 (7%)
Describe an unwanted effect	2
Context rating (small samples pulled to the average)	3.8

Magnesium (form not stated) overall: 4.2 from 938 owner comments in Reddit sleep, insomnia and supplement communities, May 2026 to October 2026.

What the research says

Magnesium is an essential mineral involved in hundreds of enzyme reactions; many people do not get the recommended amount from food.^{[NIH Office of Dietary Supplements]}
A small 2012 double-blind trial in older adults with insomnia compared 500 mg of magnesium a day with placebo for 8 weeks.^[PubMed]
A 2021 meta-analysis of trials in older adults rated the evidence as low quality.^[PubMed]

Safety

The NIH upper limit for magnesium from supplements is 350 mg a day for adults unless a doctor advises more; higher doses commonly cause diarrhea, and people with kidney disease are at higher risk of magnesium build-up.^{[NIH Office of Dietary Supplements]}
Magnesium can reduce absorption of some antibiotics and osteoporosis drugs, so doses are usually spaced apart.^{[NIH Office of Dietary Supplements]}

Good experiences

4/5 CostFalling asleep faster
“yes got severe issues at some point from too much sugar no hydration and no magnesium it was literally impossible to sleep that's why I mentioned all those things but I also work nights so take that into account let's say I am a sleep…”

owner comment via r/sleep · 2026-09-12 · 2 upvotes

4/5 Falling asleep faster
“i thought i'd never sleep again but then i started taking magnesium and vitamin d3 and i fell asleep for the 1st time in days.”

owner comment via r/insomnia · 2026-08-19 · 3 upvotes

4/5 CalmingFalling asleep faster
“For me its Chamomile tea, magnesium, tart cherry juice, going to the gym (it helps me fall asleep faster if i do it 1hr before and take a nice warm shower after wards, blackout curtains, and since I have a slight sinuses infection I have…”

owner comment via r/sleep · 2026-08-27 · 3 upvotes

Poor experiences

2/5 Falling asleep faster
“This just seems to be a hustle with the magnesium.”

owner comment via r/Supplements · 2026-09-08 · 2 upvotes

2/5 Side effectsFalling asleep faster
“After taking Magnesium Biglycinate, I no longer have this problem.”

owner comment via r/Supplements · 2026-08-04 · 1 upvotes

How reports compare in other contexts

Context	Rated comments	Positive	Negative
Deep sleep	36	30	3
Morning grogginess	30	12	14
Staying asleep	25	20	5
Anxiety at night	23	15	7
Vivid dreams	9	3	4

More on Magnesium

Talk to a doctor about new, severe or lasting symptoms, and to a pharmacist before combining supplements with medicines.