SKIN & JOINT HEALTH
What Is Collagen and Which Type Do You Actually Need?
Collagen is the most abundant protein in the human body. It forms the structural scaffolding of your skin, joints, bones, tendons, ligaments, and gut lining. Think of it as the connective tissue that holds everything together — literally.
After your mid-twenties, collagen production begins to decline at roughly 1% per year. By your forties, the effects become visible: skin loses elasticity, joints feel less fluid, recovery slows. Supplementing with hydrolyzed collagen peptides is one of the most evidence-supported strategies to counteract this decline.
But not all collagen is the same. There are at least 28 known types, each with a distinct role in the body. Understanding the key types helps you choose a formula that actually matches your goals.
The Five Types That Matter Most
Type I — Skin, Hair, Nails & Bones
The most abundant collagen in the body, Type I is the primary structural protein in skin, tendons, bones, and connective tissue. It is responsible for skin firmness and elasticity, and is the type most directly associated with visible signs of aging. Sourced primarily from bovine hide or marine collagen.
Type II — Cartilage & Joint Health
Type II collagen is the dominant protein in cartilage — the cushioning tissue between joints. It is the most relevant type for those experiencing joint discomfort, stiffness, or reduced mobility. Typically sourced from chicken sternum cartilage.
Type III — Skin Elasticity & Gut Lining
Often found alongside Type I, Type III supports skin suppleness and the integrity of the gut lining and blood vessels. It is particularly relevant for digestive health and skin hydration. Also bovine-sourced.
Type V — Cell Membranes & Placental Tissue
Type V plays a supporting role in the formation of collagen fibers and is found in cell membranes and hair. It works synergistically with Types I and III to support overall structural integrity.
Type X — Bone Formation & Joint Cartilage
Type X is involved in bone mineralization and the formation of new cartilage. It is particularly relevant for bone density support and joint repair, often sourced from eggshell membrane.
Which Type Do You Need?
| Goal | Primary Types |
|---|---|
| Skin firmness & anti-aging | I, III |
| Hair & nail strength | I, III, V |
| Joint comfort & mobility | II, X |
| Bone density support | I, X |
| Gut lining integrity | I, III |
| Comprehensive support | I, II, III, V, X |
The Case for Multi-Collagen
Single-type collagen supplements are targeted — useful if you have one specific concern. But for most people, a multi-collagen formula covering all five key types offers broader, more comprehensive support across skin, joints, bones, and gut simultaneously.
The key is sourcing diversity: a quality multi-collagen should draw from grass-fed bovine (Types I, III), chicken cartilage (Type II), wild-caught marine or eggshell membrane (Types V, X) to ensure each type is present in its most bioavailable form.
What to Look for in a Collagen Supplement
- Hydrolyzed peptides — broken down for superior absorption vs. raw collagen
- Grass-fed, pasture-raised sources — cleaner sourcing, better amino acid profile
- Added Biotin & Vitamin C — Vitamin C is essential for collagen synthesis; Biotin supports hair and nail strength
- Hyaluronic Acid — works synergistically with collagen for skin hydration
- No fillers, artificial flavors, or sweeteners
Grow Vitamin's Multi Collagen+ Capsules and Multi Collagen+ Powder deliver all five types — I, II, III, V, and X — from grass-fed and pasture-raised sources, with added Biotin 2,500mcg and Vitamin C for complete collagen support.
