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Question · Panic attacks

Does magnesium help with panic attacks?

Most say no, going by Reddit owner reports: 6 of 15 rated comments from people who mention panic attacks describe a good experience with Magnesium, and 8 describe a poor one. That is self-reported experience, not proof that it works, and results vary from person to person.

Magnesium, Panic attacks	Owner comments
Rated comments in this context	15
Positive	6 (40%)
Negative	8 (53%)
Describe an unwanted effect	6
Context rating (small samples pulled to the average)	2.9

Magnesium (form not stated) overall: 4.1 from 438 owner comments in Reddit anxiety, stress and supplement communities, May 2026 to October 2026.

What the research says

Magnesium is a mineral the body uses in hundreds of enzyme reactions. Supplements come in many forms (oxide, citrate, glycinate and others) that differ in how much magnesium they contain and how well it is absorbed.^{[NIH Office of Dietary Supplements]}
A 2017 systematic review found the evidence on magnesium and subjective anxiety suggestive but of poor quality.^[PubMed]

Safety

The NIH upper limit for magnesium from supplements is 350 mg a day for adults; higher doses commonly cause diarrhea, nausea and abdominal cramping.^{[NIH Office of Dietary Supplements]}
Magnesium can reduce the absorption of some antibiotics (tetracyclines, quinolones) and bisphosphonates, so the NIH advises spacing the doses apart.^{[NIH Office of Dietary Supplements]}

Good experiences

4/5 Side effects
“i felt crazy because everyone said magnesium helps anxiety, but i was laying awake having heart palpitations and anxiety whenever i took it.”

owner comment via r/Supplements · 2026-09-10 · 8 upvotes

4/5
“magnesium supplements helped with my anxiety (i'm not a doctor so please talk to your doctor about it), as well as meditation, breathing exercises, and yoga.”

owner comment via r/Anxiety · 2026-10-03 · 5 upvotes

4/5
“L tyrosine every morning and L theanine and magnesium byglicinate before bed.”

owner comment via r/Anxiety · 2026-07-06 · 2 upvotes

Poor experiences

2/5
“Ironic you say that because I'm pretty sure magnesium L Threonate gave me severe panic attacks and I never had them in my life before taking that supplement.”

owner comment via r/Supplements · 2026-05-11 · 3 upvotes

2/5 Side effectsTaste & form
“They did not test my magnesium, so I started taking it by myself shortly after my symptoms started, coupled with potassium rich foods and drinks.”

owner comment via r/Anxiety · 2026-08-09 · 1 upvotes

How reports compare in other contexts

Context	Rated comments	Positive	Negative
Anxiety & worry	67	43	19
Everyday stress	50	41	4
Low mood	32	21	10
Physical tension	11	6	4

More on Magnesium

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