Medical disclaimer: GutVerdict summarizes what people say about 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, or have a medical condition. New, severe or worsening symptoms (such as blood in the stool, weight loss, fever, or night-time symptoms) need a doctor, not a supplement. Full disclaimer.

Magnesium oxide vs Magnesium glycinate

On Reddit, owners rate Magnesium oxide higher overall (4.0 vs 3.7). Scores summarize self-reported experiences and are not evidence that either will work for you.

Magnesium oxideMagnesium glycinate
Typetablets or capsulescapsules or tablets
GutVerdict score4.03.7
Owner sentiment3.93.7
Recommendations3.01.9
Tolerability4.74.7
Owner comments279264
Rated comments113108
Unwanted effects reported9%7%
Top praiseDose & timing, RegularityDose & timing, Regularity
Top complaintsDose & timing, Side effectsSide effects, Dose & timing

By symptom

ContextMagnesium oxideMagnesium glycinate
IBS-C & constipation67 of 78 positive31 of 38 positive
IBS-D & loose stools5 of 6 positive3 of 8 positive
Bloating & gas15 of 15 positive4 of 9 positive
SIBO31 of 36 positive38 of 44 positive
After antibiotics3 of 3 positive2 of 4 positive
Pain & cramping11 of 15 positive14 of 17 positive

What owners say about Magnesium oxide

4/5

“Now at 32 I have not had an attack like this in almost a year whilst taking 400mg of magnesium oxide every night before bed..”

owner comment via r/IBS · 2026-08-23 · 10 upvotes
4/5

“The Micromag looks like all magnesium oxide (I may be mistaken), to give the higher percentage of magnesium inside each molecule, but this is a grey area for me because I don't know what that would do in the body.”

owner comment via r/Supplements · 2026-09-01 · 2 upvotes
4/5

“Magnesium oxide at bedtime helped me tremendously.”

owner comment via r/Constipation · 2025-11-17 · 7 upvotes

Full Magnesium oxide page →

What owners say about Magnesium glycinate

4/5

“Manage stress (I take L theanine and magnesium glycinate and it’s helped me to have a calmer response)”

owner comment via r/Microbiome · 2026-02-05 · 16 upvotes
4/5

“I take 600 mg a day of Magnesium bisglycinate for headaches and sleep.”

owner comment via r/SIBO · 2026-03-19 · 12 upvotes
5/5 Side effects

“I have to take it with food so it doesn’t upset my stomach, but other than magnesium glycinate, it has been the most life changing supplement that I’ve found.”

owner comment via r/Supplements · 2026-09-01 · 2 upvotes

Full Magnesium glycinate page →

More detail: Magnesium oxide dosage and timing · Magnesium glycinate dosage and timing

Talk to a doctor or pharmacist before switching or combining supplements, particularly if you take other medicines.