Collagen in advertisements means wrinkle-free skin, strong hair and healthy knees. This is true, but incomplete. Collagen is the most abundant protein in the human body and builds almost every tissue, including internal organs, which are hardly mentioned in supplementation. Collagen and the kidneys, heart and lungs it's a topic that rarely appears in popular articles, but has a solid basis in biology. This article is not about selling collagen as a miracle cure for heart or kidney disease. It's about knowing where collagen actually performs structural functions and why its deficiency can affect much more than just the appearance of the skin.
Collagen and kidneys
The kidneys are an organ with an exceptionally complex structure in which collagen plays a central role. The basement membrane of the glomerulus, i.e. the filter through which the blood is cleansed of toxins, is composed primarily of type IV collagen. This type of collagen forms a network that retains large protein molecules while allowing water and small metabolites to pass through. When the collagen structure in the basement membrane is disturbed, the filtration function of the kidneys is impaired. A classic example is Alport syndrome, a genetic disease resulting from mutations in the genes encoding type IV collagen, leading to progressive kidney failure. This is a well-described model showing how crucial collagen integrity is for the functioning of this organ. It is also important glycine, the dominant amino acid of collagen. Studies indicate that glycine has anti-inflammatory and cytoprotective effects in kidney tissues, especially under conditions of oxidative stress. This is not proof that collagen supplementation cures the kidneys, but it does show that the amino acids supplied with collagen may have significance far beyond the synthesis of collagen fibers. Important note: people with kidney diseases or reduced filtration function should consult collagen supplementation with a doctor. Collagen is a protein, and high protein consumption can burden the kidneys in case of existing diseases.
Collagen and the heart and blood vessels
The heart is a muscle, but its structure and strength depend largely on collagen. Heart muscle (myocardium) contains a network of collagen fibers that give it appropriate stiffness and elasticity, allowing it to contract and relax effectively. Collagen is also the main structural component heart valves. Even more important is the role of collagen in walls of blood vessels. The aorta and arteries contain primarily type I and III collagen, which makes them resistant to blood pressure and prevents rupture. The loss of collagen structure in vessel walls, resulting from oxidative stress, glycation or natural aging, is associated with arterial stiffness and higher risk of cardiovascular diseases. In cardiovascular science, hydroxyproline, the characteristic amino acid of collagen, is used as a marker of collagen turnover in cardiac tissue. This shows how closely collagen is linked to cardiac physiology at a research level.
Collagen and the lungs
The lungs are an organ that is subject to mechanical expansion and contraction throughout life. Their structure must be flexible and durable at the same time. Collagen (mainly types I and III) together with elastin creates a scaffolding of the alveoli and bronchial walls that allows for efficient breathing. When the collagen structure of the lungs is disrupted, the consequences are serious. Pulmonary fibrosis is a disease in which excessive collagen deposition occurs in the lung tissue, which leads to loss of elasticity and progressive respiratory failure. Paradoxically, it is not a disease of collagen deficiency, but of its excess and remodeling disorders. However, it shows how precisely the synthesis and degradation of collagen in the lungs must be regulated. The correct collagen structure of the lungs also translates into the resistance of the respiratory epithelium to damage and infections.
Collagen and the liver
The liver deserves separate mention. Spaces of Disse, i.e. microscopic spaces between liver cells and blood vessels, contain collagen necessary for the exchange of substances between the blood and hepatocytes. When chronic liver damage occurs (alcohol, viral hepatitis, steatosis), stellate cells are activated, which produce excessive amounts of collagen, leading to liver fibrosis. Glycine appears again in the context of protecting this organ. Research indicates its hepatoprotective effect by limiting oxidative stress and activating inflammation in liver cells.
Collagen and eyes
The cornea of the eye is made almost exclusively of collagen, mainly type I, arranged in precisely oriented layers ensuring its transparency. The vitreous body of the eye contains type II collagen. The integrity of these structures determines visual acuity and eye health. Diseases such as keratoconus (keratoconus) are directly related to disorders of the collagen structure in the eye.
Glycine: a collagen amino acid with hidden potential
Many of the properties described above have one common denominator: glycine. It is the dominant amino acid of collagen (approx. 33% of its composition), which performs functions in the body that go far beyond the building blocks of collagen fibers. Glycine is a precursor glutathione, one of the most important internal antioxidants. It participates in the synthesis of creatine, hemoglobin and bile. It has anti-inflammatory effects and is an inhibitory neurotransmitter in the central nervous system. Research by Bannai and colleagues has shown that glycine supplementation at bedtime improves sleep quality and reduces daytime sleepiness. By drinking collagen regularly, you provide your body with glycine in significant amounts. This is one of the reasons why the effects of collagen supplementation can be felt more widely than just in the skin or joints.
Does collagen supplementation support these organs?
It's worth being precise here. Most clinical studies on collagen supplementation focus on skin, joints, tendons and connective tissue. There is much less direct research showing that drinking collagen improves kidney, heart and lung function in healthy people. Therefore, collagen should not be presented as a way to improve the functioning of specific organs. However, it can be said that it provides amino acids and collagen peptides that the body uses in processes related to connective tissue. The mechanism is logical, but requires careful language. The body uses amino acids derived from collagen peptides as building blocks and signals supporting natural tissue remodeling processes. Glycine, proline and hydroxyproline are important not only for the skin, but also for the structures that give tissues elasticity, elasticity and mechanical resistance. This does not indicate a direct effect on organ function, but shows why the quality and bioavailability of collagen are important for the entire body.
When choosing a supplement, it is worth making sure that the peptides provided are part of a well-thought-out formula. Collagen drinks they differ not only in taste and dose, but also in the source of collagen, administration technology, microbiome support and additional ingredients that influence care from the inside. The number of grams per serving alone does not tell us whether the formula supports absorption, skin hydration and protection of collagen fibers from oxidative stress. SUPERSONIC Beauty Collagen Drink combines three complementary forms of fish collagen: Peptan®, Verisol® i Liposovit®. Peptan® provides high-quality collagen peptides, Verisol® supports areas related to skin elasticity and wrinkles, and Liposovit® uses liposomal technology developed for bioavailability. This approach goes beyond the simple "more grams of collagen" scheme because it focuses on the quality of the raw material, various peptide profiles and the method of their delivery.
It is also included in the formula LactoSpore®, i.e. a stable probiotic that supports the intestinal microbiome. This is important because the intestines are involved in the digestion and absorption of nutrients, including amino acids, vitamins and polyphenols. The composition is supplemented hyaluronic acid, important in the context of skin hydration and comfort, and VinOmerix®, grape seed extract rich in polyphenols supporting protection against oxidative stress. Vitamin C from wild rose supports proper collagen production, and sweetening with stevia allows you to maintain a pleasant taste without the classic added sugar. This formula was designed with a broader mechanism in mind: it provides collagen peptides, supports their use and helps protect the effects of regular supplementation. In the context of the skin, this means supporting tension, hydration, elasticity and radiance. In the context of the whole body - a sensible approach to connective tissue, without making promises that are not supported by clinical studies.
Collagen is not only about beauty
Skin, hair and nails are visible, that's why we talk about them. But collagen also builds kidney filters, artery walls, lung alveoli, heart valves and the cornea of the eye. Its role in the body is systemic, not cosmetic. The loss of collagen with age affects all these tissues at the same time, even if we notice the first effects in the mirror. Collagen supplementation does not cure kidney, heart or lung disease. But regular supply of bioavailable collagen peptides and glycine supports systemic processes of connective tissue remodeling. This is a perspective that is barely touched upon in popular articles about collagen.
FAQ
Is collagen important for the kidneys?
Yes. Type IV collagen is the main component of the basement membrane of the glomeruli, the filter responsible for blood purification. Disturbances of the collagen structure in the kidneys lead to serious diseases, an example of which is Alport syndrome.
Can people with kidney disease drink collagen?
People with reduced kidney function or kidney disease should consult collagen supplementation with a doctor. Collagen is a protein, and its higher consumption may burden the kidneys in case of existing diseases.
How does collagen affect the heart?
Collagen is a key structural protein of the heart muscle, valves and walls of blood vessels. The loss of collagen structure in arteries related to glycation and oxidative stress is one of the mechanisms leading to vascular stiffness and cardiovascular diseases.
What is glycine and why is it important in collagen?
Glycine constitutes approximately 33% of the collagen composition and has many functions that go beyond the structure of collagen fibers: it is a precursor of glutathione (antioxidant), participates in the synthesis of creatine, has anti-inflammatory and hepatoprotective effects and improves the quality of sleep.
Does collagen affect vision?
The cornea of the eye is made almost exclusively of type I collagen. The vitreous body contains type II collagen. The integrity of these structures has a direct impact on visual acuity and eye health.
Does collagen supplementation support internal organs?
There are fewer direct clinical studies on this topic than for skin and joints. Mechanistically, however, collagen peptides provide the body with building blocks and signals for the remodeling of connective tissue in all organs. Glycine contained in collagen has cytoprotective effects confirmed in studies on the liver and kidneys.
Sources
Shoulders MD, Raines RT, Collagen Structure and Stability, Annual Review of Biochemistry, 2009. pubmed.ncbi.nlm.nih.gov/19344236
Hudson BG, Tryggvason K, Sundaramoorthy M, Neilson EG, Alport's Syndrome, Goodpasture's Syndrome, and Type IV Collagen, New England Journal of Medicine, 2003. pubmed.ncbi.nlm.nih.gov/12815141/
Zhong Z, Wheeler MD, Li X et al., L-Glycine: a novel antiinflammatory, immunomodulatory, and cytoprotective agent, Current Opinion in Clinical Nutrition and Metabolic Care, 2003. pubmed.ncbi.nlm.nih.gov/12589194/
Bannai M, Kawai N, New therapeutic strategy for amino acid medicine: glycine improves the quality of sleep, Journal of Pharmacological Sciences, 2012. pubmed.ncbi.nlm.nih.gov/22293292/
Proksch E, Segger D, Degwert J et al., Oral Supplementation of Specific Collagen Peptides Has Beneficial Effects on Human Skin Physiology: A Double-Blind, Placebo-Controlled Study, Skin Pharmacology and Physiology, 2014. pubmed.ncbi.nlm.nih.gov/23949208
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