Supplements for constipation

Written to our editorial standards · reviewed against published research· Updated 2 Jun 2026
Digestion

Constipation is commonly eased by magnesium citrate and psyllium fibre, with a probiotic supporting longer-term regularity, plus water and movement.

Magnesium citrate draws water into the gut to soften stool and is a gentle, effective option, while psyllium adds the bulk that fibre-poor diets lack. A probiotic can improve transit over time, but fluid, fibre from food, and daily movement are the foundation.

Nutrients commonly linked

Magnesium Citrate
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Psyllium Husk Powder
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Multi-Strain Probiotic
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Biomarkers worth checking

These are the blood tests most relevant here. Knowing your numbers tells you whether a supplement is the right answer.

TSH
When to see a doctor

New constipation in mid-life, blood in stool, unexplained weight loss, or alternating constipation and diarrhoea should be investigated by a doctor.

Beyond supplements

Water, fibre-rich foods, daily walking, and a consistent toilet routine usually resolve everyday constipation.

Common questions

What supplements help with constipation?
Constipation is commonly eased by magnesium citrate and psyllium fibre, with a probiotic supporting longer-term regularity, plus water and movement. The nutrients most often linked are Magnesium Citrate, Psyllium Husk Powder, Multi-Strain Probiotic.
Which deficiencies are associated with constipation?
Magnesium citrate draws water into the gut to soften stool and is a gentle, effective option, while psyllium adds the bulk that fibre-poor diets lack. A probiotic can improve transit over time, but fluid, fibre from food, and daily movement are the foundation.
When should I see a doctor about constipation?
New constipation in mid-life, blood in stool, unexplained weight loss, or alternating constipation and diarrhoea should be investigated by a doctor.

Explore further

Find out what's actually low

Upload your bloodwork and we'll read the relevant markers, or take the quiz for a personalised stack.

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Educational use only, not medical advice, diagnosis, or treatment. Symptoms have many possible causes, and the nutrients here are commonly associated with this symptom, not a guaranteed fix. Always consult a qualified clinician, especially if symptoms are severe, persistent, or new.