Constipation Relief: A Nutritionist's Guide to Acute & Chronic Solutions
Whether you're dealing with a one-off bout or a long-standing issue, here's exactly what to do, backed by clinical practice.
Constipation is one of the most common digestive complaints, yet it's also one of the most misunderstood. The approach that works for an acute, sudden bout is very different from what's needed when constipation has become a chronic pattern. As a nutritionist and gut health clinician, here's how I think about, and treat, both.
Acute Constipation: Quick, Effective Relief
Acute constipation typically comes on after travel, a change in diet, stress, or reduced hydration. The good news? There are some simple, evidence-backed strategies that can get things moving quickly.
Start with Kiwifruit
Kiwifruit is one of the most underrated tools for constipation relief. Two kiwis per day has been shown in clinical research to improve bowel frequency and consistency, comparable to psyllium husk, and with fewer side effects. Kiwifruit contains actinidin, a unique proteolytic enzyme that supports gut motility and acts as a gentle natural laxative.
Clinical Tip
Eat 2 green kiwis daily, skin on if tolerated, as the skin contains concentrated fibre and bioactive compounds. Results are often seen within 24–48 hours.
Load Up on Soluble Fibre and Pectin
Soluble fibre absorbs water and forms a gel-like substance in the gut, softening stool and making it easier to pass. Pectin, found in the flesh and skin of many fruits and vegetables, is a particularly powerful form of soluble fibre for bowel regulation.
Best foods for pectin and soluble fibre:
Kiwifruit — Actinidin enzyme + soluble fibre, a top pick for constipation relief
Apples (with skin) — High in pectin, especially in the peel.
Carrots — Pectin-rich and easy to add to meals or snacks daily
Citrus fruits (with pith) — The white pith is a pectin powerhouse, don't discard it
Berries — Soluble fibre plus antioxidants for overall gut health
Pears (with skin) — One of the highest pectin-containing fruits available
Magnesium Glycinate for Gentle Relief
Magnesium draws water into the intestines, softening stool and stimulating bowel movement. Magnesium glycinate is the preferred form, it's highly bioavailable, gentle on the stomach, and less likely to cause the loose stools associated with magnesium oxide or citrate.
A typical starting dose is 200–400mg taken before bed. Always check with your healthcare provider before supplementing, especially if you have kidney concerns.
Chronic Constipation: A Deeper Clinical Approach
When constipation is persistent, occurring regularly over months or years, it's rarely just about not eating enough fibre. In clinical practice, chronic constipation often signals an underlying imbalance in the gut microbiome that needs proper investigation.
The Role of Gut Health Testing
For clients with chronic constipation, I routinely recommend comprehensive stool testing (such as the GI-MAP or similar functional tests). One of the most common findings? Elevated methanogens, particularly Methanobrevibacter smithii, a type of archaea in the gut that produces methane gas. High methane levels are strongly associated with slow transit constipation, as methane gas directly slows gut motility.
Key markers we investigate include:
Methanogens (methane-producing archaea) — strongly linked to slow transit constipation
Secretory IgA levels — a marker of gut immune health and mucosal integrity
Butyrate-producing bacteria — essential for colon health and motility
Dysbiosis markers — imbalances in beneficial vs. harmful bacteria
Zonulin / intestinal permeability — indicators of a leaky gut
Inflammatory markers (e.g. calprotectin) — to rule out inflammatory bowel conditions
Once we have a clear picture of what's driving the constipation, treatment becomes far more targeted and far more effective. Protocols may include specific probiotics, dietary interventions, and in some cases antimicrobial herbs to address methanogen overgrowth.
Don't Forget the Fundamentals
Even with chronic constipation, the foundations still matter. These include:
Adequate hydration: especially first thing in the morning (aim for 500ml upon waking)
Regular movement: even a 20-minute daily walk meaningfully supports gut motility
Stress management: the gut-brain axis is real; chronic stress slows digestion
Consistent bathroom routine: working with your body's natural circadian rhythm
Ready to Get to the Root Cause of Your Gut Issues?
Whether you're dealing with occasional constipation or a long-standing gut health problem, personalised testing and nutrition support can make all the difference. Book a consultation today and let's build a plan that actually works for your body.
