Kollagen Nebenwirkungen: Was Du wissen musst

Side effects of collagen: what you need to know

Collagen side effects have surged due to the popularity of Collagen supplements. Their potential benefits make them valuable. These include better skin elasticity, joint health, and stronger nails. Yet, like any supplement, it's possible that collagen side effects can occur.

Although generally considered safe for almost all people, some individuals may experience adverse reactions. Standard collagen side effects may include digestive problems such as bloating, heartburn, and a sensation of fullness. Allergic reactions can also occur. They're a risk for people allergic to the source of the collagen, like fish or eggs.

Additionally, some people report a lingering aftertaste or bad breath due to collagen side effects. Before beginning any new supplement regimen, it's essential to consult with a healthcare professional. This is especially important if you have health conditions or take other medications. Knowing these collagen side effects can help you choose well, and then you can enjoy its benefits.



What are the common collagen side effects?


Dyspepsia and indigestion are also potential collagen side effects. This condition results in discomfort in the upper abdomen. It's often followed by bloating, nausea, and a quick feeling of fullness during meals. Collagen is high in protein. It can make the stomach produce more acid. This causes these symptoms. To relieve dyspepsia, try taking collagen with food. Split the dosage throughout the day. Or, choose hydrolyzed collagen, which is easier to digest. If it persists, seek a healthcare provider's advice to identify underlying causes.

A bad taste in one's mouth

Taking collagen supplements can leave a bad taste in some people's mouths. The source of collagen, such as marine or bovine, can cause an unpleasant aftertaste. Specific formulations or additives in supplements might also contribute to this sensation. Mix collagen powder with a flavoured drink or smoothie to fight this side effect. This will hide the taste. Or, you could choose a different form of collagen. For example, capsules or flavoured types might help. Good oral hygiene helps. It includes brushing your teeth and using mouthwash. It can also reduce the sour taste.


Headaches are a less common but possible side effect of taking collagen supplements. They can happen for several reasons, including dehydration, changes in diet, or sensitivities to certain additives. Collagen might not cause headaches, but the body's reaction to the new supplement routine could trigger them. Staying well-hydrated and eating well can help, as can choosing high-quality, additive-free collagen supplements. If headaches persist due to collagen side effects, consult a healthcare professional. They will determine if collagen or another factor is the cause and find a solution.


Dizziness is another possible side effect. Some might feel it when starting collagen supplements. This occurs if the body isn't used to the new protein or if blood pressure or sugar levels change. To prevent dizziness, drink water and eat balanced meals. Start with a small dose of collagen. Then, increase it. This can help your body adjust. Stop taking the supplement if you're dizzy due to collagen side effects. It's recommended that you ask a healthcare professional for help. They will check for severe conditions or adjust your supplements.


Insomnia is the difficulty of sleeping. It can be collagen side effects. This is particularly true if you take them in large amounts or late in the day. Collagen contains amino acids, such as glycine. They can stimulate some people. Watch your body's response. Also, good sleep hygiene helps. Establish a regular bedtime routine and set up a calm sleep environment. It can help reduce this side effect. If insomnia continues, it might help to consult a healthcare professional. They can provide further guidance.


Rashes may develop as an allergic reaction to collagen supplements. This is especially true if you are sensitive to collagen's source. This includes fish, shellfish, or bovine products. Symptoms can include redness, itching, and swelling of the skin. To prevent collagen side effects, check the ingredients list. Make sure you're not allergic to any of the supplement's parts. Doing a patch test before starting the supplement can also cause allergic reactions. If you notice a rash, please stop using it immediately for your safety. Then, consult a healthcare professional to address the allergy. They will help you find a suitable alternative if needed.


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Potential impact on the body

The following reactions may cause discomfort and irritation. The user should stop taking the supplement and consult a healthcare professional to avoid further complications.


Too much collagen may strain the liver, which must process extra proteins. Collagen side effects can overwork the liver and raise enzyme levels, which, if not managed, can lead to liver damage or dysfunction over time. 


High protein intake from collagen supplements can strain the kidneys. This strain can cause kidney stones or impair kidney function. It predominantly affects individuals with preexisting kidney conditions.


Potential gastrointestinal issues include bloating, indigestion, and diarrhoea. Persistent digestive discomfort can lead to nutrient malabsorption and dehydration, affecting health and well-being.


Collagen side effects very  rarely cause changes in heart rate or blood pressure. These changes can worsen existing heart conditions and increase the risk of heart problems. This requires careful monitoring and consulting with a healthcare provider. 


Given the potential side effects, it is important that you follow the recommended intake when using supplements. As an example, the recommended intake for products from the Kollagen Institut is 5 grams per day. Considering the fact that a healthy individual should take about 0.8 to 1 g protein per kg bodyweight per day, a dose of 5 grams of collagen per day is considered perfectly safe. 


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Types of Collagen

Collagen Type I

Collagen type I is present in the skin, bones, and teeth tissues. It provides structural support and strength. It is vital in keeping skin stretchy, bones strong, and teeth intact. This collagen is the most common in the human body. It's essential for wound healing and maintaining tissue structure and bounce.

Collagen Type II

You can find collagen type II in cartilage. It's essential for joint health and mobility. This collagen type provides strength and stretch to cartilage. It lets cartilage withstand crushing forces. It's crucial for keeping the joints strong. It's often used in supplements to ease joint pain. It also improves conditions like osteoarthritis.

Collagen Type III

Collagen type III is prevalent in muscles, skin, and blood vessel tissues. It works with type I collagen to give skin and tissues structure and elasticity. This collagen is crucial for forming and maintaining blood vessels, heart function, muscle tissue support, and wound healing.

Collagen Type IV

Collagen type IV is critical in the basement membrane, supporting epithelial and endothelial cells. This essential collagen is crucial in providing structural support, acting as a protective barrier, and regulating the passage of cells and molecules. We've needed it for tissue repair and filtration in the kidneys. It also keeps many organs and tissues healthy, including the skin, lungs, and blood vessels.

Collagen Type V

Collagen type V is critical to hair, bones, placentas, livers, and lung tissues. It forms collagen fibrils and regulates tissue. In bones, it maintains strength and structure. In the placenta, it supports fetal growth. This collagen type also helps the liver, lungs, and hair. It keeps them working well.


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Collagen supplements offer many benefits. However, you must be aware of their collagen side effects and take precautions. Ask a healthcare professional before taking a new supplement. They will ensure it's right for your health needs and conditions. 

Watch how your body responds to collagen's side effects. Adjust the dose as needed to avoid bad reactions. Stay hydrated and consume collagen with meals to reduce digestive issues. If you have severe collagen side effects, like allergies, headaches, or dizziness, stop using the product now. Then, seek medical advice.

Image credits: Sander Sammy, Towfiqu barbhuiya, Kira auf der Heide, Daniele Levis Pelus, Markus Spiske on Unsplash

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