Collagen: Effects, Types & Use - The Complete Guide
Collagen is the most abundant protein in the human body and essential for skin, hair, nails, joints, bones and connective tissue. In this comprehensive guide you will learn everything about collagen hydrolysate, the different collagen sources, dosage forms, dosing and quality criteria - scientifically grounded and practical.
Table of contents
What is collagen?
Collagen makes up about 30% of the total protein in our body. It forms the structural framework for skin, bones, tendons, ligaments, cartilage, blood vessels and teeth. You can think of it as the "glue" that holds our body together - the name derives from the Greek word "kolla" (glue).
From the age of 25 the body's own collagen production decreases by about 1-1.5% per year. Visible consequences: wrinkles, sagging skin, brittle nails, thinning hair, stiffer joints and a declining bone density. External factors such as UV radiation, smoking, sugar and chronic stress additionally accelerate collagen breakdown.
Targeted supplementation with high-quality collagen peptides can counteract this process. Numerous clinical studies document positive effects on skin, joints, bones and connective tissue.
Collagen hydrolysate & bioavailability
Not every collagen is equally effective. The key lies in hydrolysis - an enzymatic process in which the long collagen chains are split into short peptides.
❌ Native collagen
- • High molecular weight (>300,000 Dalton)
- • Is denatured in the stomach
- • Cannot be absorbed by the gut
- • No detectable effect as a supplement
✅ Collagen hydrolysate
- • Low molecular weight (<5,000 Dalton)
- • Is absorbed in the gut
- • Bioavailability over 90%
- • Clinically demonstrated effect
In the body the peptides have a twofold effect: they directly supply the amino acids glycine, proline and hydroxyproline as building blocks for new collagen. At the same time they signal the fibroblasts (collagen-producing cells) to ramp up collagen synthesis.
Collagen types: I, II and III
There are over 28 different collagen types, but three are particularly relevant for supplementation:
Type I
90% of the body's collagen
- • Skin (firmness)
- • Bones
- • Tendons & ligaments
- • Teeth
Type II
Main component of cartilage
- • Joint cartilage
- • Intervertebral discs
- • Vitreous body of the eye
Type III
Elasticity & structure
- • Skin (elasticity)
- • Blood vessels
- • Internal organs
- • Connective tissue
Bovine collagen mainly contains type I and III and is therefore particularly suited for skin, hair, nails and connective tissue. For targeted joint support, type II collagen (e.g. from chicken cartilage) can be a sensible addition.
Bovine vs. marine collagen
| Criterion | Bovine collagen | Marine collagen |
|---|---|---|
| Collagen types | Type I + III | Mainly type I |
| Source | Bovine hide | Fish skin/scales |
| Molecular weight | 2,000-5,000 Da | 1,000-3,000 Da |
| Bioavailability | Very high | Slightly higher |
| Ideal for | Skin, connective tissue, bones | Skin, skin structure |
| Quality criterion | Pasture-raised / grass-fed | Wild-caught / MSC |
For a holistic approach (skin + connective tissue + bones), pasture-raised bovine collagen is the preferred choice. Kollagen Pure Peptides by Nature Heart uses exactly this kind of premium bovine collagen.
Dosage forms: powder, capsules & liquid
🥄 Powder
Recommended
- • Flexible dosing (5-15 g)
- • Taste-neutral
- • In coffee, smoothie, water
- • Best value for money
💊 Capsules
Convenient on the go
- • Easy to take
- • Exact dosing
- • Many capsules needed for 10 g
- • Higher price per unit
💧 Liquid
Drinking ampoules
- • Fast absorption
- • Often with additives
- • More expensive per serving
- • Not always pure
Our tip: Collagen powder offers the best combination of dosing flexibility, purity and price. Simply stir it into your coffee or smoothie in the morning.
Areas of application
Collagen is far more than just a beauty supplement. It supports numerous body functions:
Skin & wrinkles
Improves skin elasticity by up to 15%, increases skin moisture by 12-28% and reduces wrinkle depth. Studies show results after 4-8 weeks.
Hair & nails
Collagen supplies the amino acid proline - a main building block of keratin. Studies show stronger, less brittle nails and fuller hair after 3-6 months.
Connective tissue
Collagen type I and III form the structural framework of connective tissue. Supplementation can improve the firmness and elasticity of connective tissue.
Cartilage & joints
Collagen type II is the main component of joint cartilage. Studies show reduced joint pain and improved mobility in osteoarthritis patients.
Bones
Bones are made up of 90% collagen type I. Studies show that collagen peptides can improve bone mineral density and slow down bone loss.
Teeth & gums
Gums and the periodontal apparatus largely consist of collagen. A good collagen supply supports dental health and firm gums.
Sport & recovery
Collagen supports the regeneration of tendons and ligaments after training. Athletes benefit from faster recovery and a lower risk of injury.
Weight & body composition
Collagen is a satiating protein that can help maintain muscle mass. It contains 18 amino acids and provides about 90% protein with zero carbohydrates and fat.
Quality & safety
Quality is decisive for collagen supplements. Not every product on the market meets high standards. Look for the following features:
Origin & animal husbandry
Pasture-raised / grass-fed (bovine) or sustainable wild-catch (fish). No factory farming.
Lab-tested
Independent tests for heavy metals (lead, cadmium, mercury), antibiotics, pesticides and microbial contamination.
Antibiotic-free
Collagen from species-appropriate husbandry without routine use of antibiotics. Tested to be residue-free.
Made in Germany
Production to GMP standards in certified German laboratories. Highest quality and safety standards.
Without additives
Pure collagen without flavorings, sweeteners, fillers or preservatives.
Low molecular weight
Below 5,000 Dalton for maximum bioavailability and optimal absorption in the gut.
Kollagen Pure Peptides by Nature Heart meets all these criteria: pasture-raised bovine collagen, lab-tested for heavy metals and residues, manufactured in Germany to the highest standards.
Dosing & intake tips
Recommended daily dosage
Skin & skin structure:
5-10 g hydrolyzed collagen
Joints & cartilage:
10 g hydrolyzed collagen
Bones & connective tissue:
5-10 g hydrolyzed collagen
Sport & recovery:
10-15 g hydrolyzed collagen
Intake tips
- Take in the morning on an empty stomach or with breakfast
- Stir into coffee, smoothie, water or juice - taste-neutral
- Always take together with vitamin C (e.g. acerola) for optimal collagen synthesis
- Take regularly for at least 8 weeks for visible results
- Do not mix with very hot drinks (>80°C) - the peptides are heat-sensitive
- Collagen can be taken continuously without any problem
Cofactors: vitamin C, zinc & silicon
Collagen alone is only half the battle. For your body to be able to form new collagen, it needs certain cofactors:
🍊 Vitamin C - the most important cofactor
Without vitamin C the body cannot form collagen. It activates the enzymes prolyl and lysyl hydroxylase, which are needed for the cross-linking of the collagen fibers. Natural vitamin C from the acerola cherry offers a particularly high bioavailability thanks to natural bioflavonoids.
EFSA Health Claim: Vitamin C contributes to normal collagen formation for the normal function of skin.
⚡ Zinc
Zinc is an essential cofactor for over 300 enzymes, including those involved in collagen synthesis. A zinc deficiency impairs wound healing and skin regeneration - both processes that strongly depend on collagen.
💎 Silicon (silicic acid)
Silicon is involved in the cross-linking of collagen and elastin fibers. It supports the firmness of skin, hair, nails and connective tissue. Natural silicon sources are horsetail, nettle and bamboo extract.
That is why we recommend: always take collagen in combination with at least vitamin C. Vitamin C Acerola Vitamin C contributes to normal collagen formation for the normal function of skin. (authorized EU health claim).
Vegan collagen alternatives
Collagen is an animal protein - there is no plant-based collagen. Plants do not biologically produce collagen. What does exist are "collagen boosters": nutrients that support the body's own collagen synthesis.
Vegan nutrients for collagen formation:
- Vitamin C (e.g. from acerola) - essential cofactor of collagen synthesis
- Amino acids - especially glycine, proline and lysine as collagen building blocks
- Silicon/silicic acid - supports cross-linking of collagen fibers
- Zinc - involved in wound healing and skin regeneration
- Copper - activates the enzyme lysyl oxidase for collagen cross-linking
Tip: with Amino 8 Essentials and Vitamin C Acerola you can also support your body's own collagen production with plant-based nutrients.
More on this in our article: Vegan collagen alternative - nutrients for collagen formation →
Our product recommendations
Kollagen Pure Peptides
Premium collagen hydrolysate from pasture-raised cattle. Taste-neutral, lab-tested, Made in Germany.
Learn morePremium Kollagen
High-dose collagen hydrolysate with added vitamin C as a cofactor - the ideal combination for daily use.
Learn moreVitamin C Acerola
Natural vitamin C as an essential cofactor for collagen formation. With bioflavonoids.
Learn moreFurther articles
Frequently asked questions about collagen
Ready for your collagen routine?
Start now with high-quality, pasture-raised collagen peptides - lab-tested, taste-neutral and Made in Germany.
Note: Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle. Do not exceed the stated recommended daily intake. Keep out of reach of young children. This content is for general information only and is not a substitute for medical advice – please consult a doctor or pharmacist if you have health concerns. Any EFSA health claims mentioned refer to the respective nutrients at a sufficient daily intake. References to studies provide scientific context and do not constitute any claim to cure or any health effect.