Struggling with constipation or diarrhea from IBS (Irritable Bowel Syndrome)? You’re not alone. IBS affects millions of people across Canada and the United States, and magnesium supplements can offer natural, effective relief for some of its most frustrating symptoms.

While poor dietary fiber and low water intake often contribute to constipation, stress and anxiety are common triggers for diarrhea. Magnesium supports gut health by softening stools, calming the nervous system, and helping relax intestinal muscles. But with so many products on the market, how do you choose the best magnesium supplement for IBS?

Best Magnesium Supplement for IBS-Related Constipation

Constipation is one of the most common IBS symptoms. While increasing fiber and water is a critical first step, it doesn’t always resolve the issue. That’s where magnesium can help.

Magnesium works by drawing water into the intestines, which helps soften stools and make them easier to pass. It also helps relax the intestinal muscles, reducing bloating and abdominal discomfort.

So, what’s the best form of magnesium for constipation?

• Magnesium citrate is widely considered the most effective form for relieving constipation due to its high absorption rate and gentle laxative effect.
• MAG365 is a 100% pure, ionic magnesium citrate powder that’s formulated for fast and efficient absorption. It’s a top choice in both Canada and the US for those managing IBS-related constipation naturally.

Best Magnesium Supplement for IBS-Related Diarrhea

IBS with diarrhea (IBS-D) is often triggered by stress and anxiety—both of which impact the nervous system and gut motility. Research shows a direct link between emotional stress and diarrhea in people with IBS.

Magnesium has a calming effect on the nervous system, making it a valuable support for those dealing with stress-induced digestive issues. In fact, studies show that magnesium supplementation may improve symptoms of anxiety, stress, and gastrointestinal discomfort.

What’s the best magnesium for diarrhea-prone individuals?

• Magnesium bisglycinate is one of the most gut-friendly forms of magnesium. It’s gentle on the digestive system and unlikely to cause loose stools—unlike some other forms.
• PrizMAG Pure Magnesium Bisglycinate is a genuinely pure, highly bioavailable option that contains no magnesium oxide, which is known to cause digestive upset. It’s ideal for individuals with IBS-D who need nervous system support without worsening their symptoms.

How to Choose the Right Magnesium Supplement for IBS

When shopping for a magnesium supplement for IBS, here’s what to look for:

• Purity – Avoid products that are buffered or contain fillers, binders, or magnesium oxide (which can irritate the gut).

• Bioavailability – Choose forms that the body can easily absorb and utilize.

• Purpose-specific – Match the magnesium form to your primary symptom: ionic magnesium citrate for constipation, magnesium bisglycinate for diarrhea or stress sensitivity.

Summary

• For IBS-C (constipation-dominant IBS) - MAG365 is an excellent choice*. It's fast-absorbing ionic magnesium citrate in a powder form.

• For IBS-D (diarrhea-dominant IBS) - PrizMAG Pure Magnesium Bisglycinate is ideal*. It's gentle, effective, and free from common gut irritants.

Both MAG365 and PrizMAG are formulated without additives or hidden ingredients—making them trusted choices for those seeking natural digestive support.

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*Always consult your healthcare provider before starting any new supplement, especially if you have IBS or other gastrointestinal conditions.