Constipation: 6 Natural Remedies That Actually Work

Constipation is both uncomfortable and frustrating – but fortunately, there are several scientifically documented methods that actually work. The most effective solutions combine dietary fiber, fluids, movement, and specific nutrition. In this article, you get six concrete, natural strategies that help you achieve regular bowel movements without medication.

Why does constipation actually occur?

Constipation is typically defined as fewer than three bowel movements per week or difficulty emptying the bowels. There are many causes: too little dietary fiber, dehydration, sedentary lifestyle, stress, changes in routines or diet – and in some cases as a side effect of medication or hormonal changes.

In people undergoing GLP-1 treatment (such as Wegovy, Ozempic, Saxenda), constipation is a common side effect because the medication slows intestinal movements. A study in Nutrients (2023) shows that dietary fiber and probiotics can significantly alleviate these symptoms.

1. Increase your intake of soluble dietary fiber

Soluble dietary fibers absorb water and form a gel-like mass that softens stool and makes it easier to pass. The best sources are:

• Oatmeal and barley groats (contain beta-glucans)
• Flaxseeds, chia seeds, and psyllium
• Apples, pears, plums (with skin)
• Sweet potatoes, carrots, lentils

The European Food Safety Authority (EFSA) has approved that beta-glucans from oats can increase stool bulk (1), and psyllium has shown effects in randomized studies against both constipation and bloating.

2. Drink plenty of water – at least 2 liters a day

Dehydration is one of the most common causes of hard stools. When the body lacks fluid, the colon draws water from the stool, making it firm and difficult to pass.

The recommendation is at least 2 liters of water daily – more if you exercise, follow a high-fiber diet, or are in hot weather. Start the day with a large glass of lukewarm water to kickstart bowel function.

3. Eat fermented foods – they nourish your digestion and gut flora

Healthy digestion and gut flora are essential for good bowel movements. Fermented foods like kefir, sauerkraut, kimchi, kombucha, and yogurt contain probiotic bacteria that can support the gut’s natural movements.

A groundbreaking study from Stanford University (Wastyk et al., 2021) showed that participants who ate fermented foods daily for 10 weeks experienced increased microbiome diversity and reduced inflammation. Healthy digestion and gut flora can also reduce bloating and make bowel movements more regular.

4. Get moving – even 20 minutes of walking helps

Physical activity stimulates the natural movements of the intestines. You don’t need to run a marathon – just 20-30 minutes of daily walking has documented effects against constipation.

A 2020 meta-analysis concludes that moderate exercise increases bowel transit time and improves symptoms in people with chronic constipation. Yoga and abdominal massage can also help.

5. Consider magnesium – nature’s relaxing mineral

Magnesium draws water into the intestines and relaxes the intestinal muscles, making stools softer and easier to pass. Magnesium citrate is a popular form because it is well absorbed and has a mild laxative effect.

EFSA has confirmed that magnesium helps with normal muscle function (2), which also applies to the smooth muscles of the intestines. Start with 200-300 mg per day and adjust as needed – too high doses can cause loose stools.

6. Try spirulina – green algae with digestive support

Spirulina is a protein-rich microalga that contains dietary fiber, chlorophyll, and enzymes. Spirulina can help support your vitality and energy (3), and although research mainly focuses on spirulina’s effect on energy and oxidative stress, pilot studies also show benefits for digestion in people with chronic fatigue and constipation.

Spirulina contains about 8-10% fiber by weight and can supplement your daily fiber intake, especially if you have difficulty eating enough vegetables.

What about constipation during GLP-1 treatment?

If you are being treated with GLP-1 agonists (Wegovy, Ozempic, Saxenda), constipation is a well-known side effect. The medication slows stomach emptying and reduces bowel movements, which can lead to hard stools, bloating, and discomfort.

An article in the American Journal of Clinical Nutrition (Mozaffarian et al., 2025) recommends protein optimization, fiber, fluids, and probiotics as important strategies during GLP-1 therapy. Supplements with fiber, magnesium, and vitamins can complement the diet if appetite is low.

Frequently asked questions about constipation

What helps best against constipation naturally?

The most effective natural methods are to increase intake of soluble dietary fibers (psyllium, oats, flaxseeds), drink at least 2 liters of water daily, eat fermented foods like kefir and sauerkraut, and get at least 20 minutes of movement per day. Combining these strategies gives the best results.

How quickly do fibers work against constipation?

The effects of fiber typically appear within 1-3 days, but it requires that you also drink plenty of water. Soluble fibers like psyllium can work within 12-24 hours. Remember to increase your fiber intake gradually to avoid bloating and cramps.

Is magnesium good for constipation?

Yes, magnesium – especially magnesium citrate – has a mild laxative effect because it draws water into the intestines and relaxes the intestinal muscles. EFSA has approved that magnesium helps with normal muscle function (2). Start with 200-300 mg daily and adjust as needed.

Which foods should I avoid with constipation?

Avoid or limit foods that bind stool: white bread, rice, bananas (especially unripe), excessive dairy intake, fried foods, and processed meats. Instead, focus on fiber-rich vegetables, fruit with skin, whole grains, and legumes.

Can stress cause constipation?

Yes, stress affects the gut-brain axis and can inhibit the gut’s natural movements. Chronic stress increases cortisol, which can disrupt digestion. Relaxation techniques, exercise, sleep, and mindfulness can help.

What should I do if natural methods don’t work?

If constipation lasts more than 2 weeks, is accompanied by pain, blood in the stool, or unexplained weight loss, you should contact your doctor. These may be signs of underlying conditions that require medical investigation.

Summary: Get started today

Constipation is uncomfortable, but fortunately, there are many effective, natural solutions. Start with the three most important: increase your fiber intake, drink at least 2 liters of water daily, and get moving every day.

Feel free to supplement with fermented foods, magnesium, and possibly spirulina for extra support for your digestion and gut flora. Remember that dietary changes should be made gradually – your gut needs time to adjust.

Dietary supplements should not replace a balanced and varied diet or a healthy lifestyle. Always consult your doctor if digestive problems persist.

Summary of Reviews

1. Oat beta-glucan contributes to an increase in stool bulk
2. Magnesium contributes to normal muscle function
3. Spirulina helps support the body's vitality