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 · Deep sleep

Does magnesium glycinate improve deep sleep?

Many say yes, going by Reddit owner reports: 36 of 44 rated comments from people who talk about deep or restful sleep describe a good experience with Magnesium glycinate, and 3 describe a poor one. That is self-reported experience, not proof that it works, and results vary from person to person.

Magnesium glycinate, Deep sleep	Owner comments
Rated comments in this context	44
Positive	36 (82%)
Negative	3 (7%)
Describe an unwanted effect	2
Context rating (small samples pulled to the average)	3.8

Magnesium glycinate overall: 4.0 from 1039 owner comments in Reddit sleep, insomnia and supplement communities, May 2026 to October 2026.

What the research says

Magnesium is an essential mineral; supplements come in many forms (glycinate, citrate, oxide and others) that differ in how much magnesium they deliver and how they are absorbed.^{[NIH Office of Dietary Supplements]}
A 2021 meta-analysis of trials in older adults found the evidence on oral magnesium for insomnia was 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 Deeper sleep
“and i started taking magnesium before bed, the glycinate kind, it helped with the body aches and sleep quality”

owner comment via r/Supplements · 2026-08-14 · 20 upvotes

4/5 CalmingDeeper sleep
“Had to toss mag glycinate bc it kept me in light sleep all night.”

owner comment via r/Supplements · 2026-10-09 · 17 upvotes

4/5 Deeper sleep
“Supplement-wise, magnesium glycinate helped my sleep quality, which indirectly improved energy and focus way more than most "energy" supplements.”

owner comment via r/Supplements · 2026-06-14 · 9 upvotes

Poor experiences

2/5 Deeper sleep
“I'm one of those that just can't take glycinate, makes me run hot and wake up several times during the night like I'm never in a deep sleep.”

owner comment via r/Supplements · 2026-10-11 · 3 upvotes

2/5 Falling asleep faster
“I started nightly 200mg magnesium glycinate a month ago.”

owner comment via r/Supplements · 2026-06-05 · 1 upvotes

How reports compare in other contexts

Context	Rated comments	Positive	Negative
Falling asleep	64	51	7
Morning grogginess	55	25	24
Staying asleep	49	36	11
Anxiety at night	22	13	7
Vivid dreams	17	9	7

More on Magnesium glycinate

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