There are more than two dozen collagen types in the body, but for supplements only three really matter. Type I is the most abundant and gives skin, tendon, and bone their tensile strength. Type III works alongside Type I in skin to support elasticity and structure. Type II is the collagen in cartilage, and it is the type most associated with joints. The practical takeaway is simple: Type I and III are the skin, hair, and nail types, while Type II is the cartilage and joint type. The source on the label, bovine or marine, is what sets which types you actually get.

Collagen is the most plentiful protein in the body and the main structural scaffolding for skin, hair, nails, bone, and connective tissue. When you supplement, the type you want depends entirely on your goal rather than on collecting every variety. Matching the type to the job is the whole game.

• Type I is the structural workhorse. It is the dominant collagen in skin, tendon, and bone, and the type behind much of their strength.
• Type III partners with Type I. In skin it works with Type I to support elasticity and firmness, which is why the two are usually paired.
• Type II is the joint type. It is the collagen found in cartilage and is used differently, often at lower doses, for joint-specific goals.
• The source sets the profile. Bovine and marine collagen are both rich in Type I and III, so the source you see is a signal of the types inside.

On Dr. White: the Collagen Gummies are built around Type I and III for skin and structural support. See the Dr. White Collagen Gummies.

The body makes many forms of collagen, but in the world of supplements three account for nearly all the conversation. Knowing what each one does makes choosing a product far simpler.

Type I is the most abundant collagen in the body. It is the dominant structural protein in skin, tendon, ligament, and bone, and it is the type responsible for much of their tensile strength. When people talk about collagen for skin and structure, Type I is usually the one doing the heavy lifting.

Type III is found alongside Type I, especially in skin and other soft, elastic tissues. It works together with Type I to support the skin's elasticity and overall structure, which is why the two are so often discussed and supplemented as a pair.

Type II is different. It is the primary collagen in cartilage, the smooth tissue that cushions joints, and it is the type most associated with joint and cartilage support. Because of where it lives in the body, it tends to be used in a different way than Type I and III.

For most people reaching for collagen, the goal is appearance: skin, hair, and nails. That is the territory of Type I and Type III. Type I supplies the bulk of the skin's tensile strength, and Type III works with it to support elasticity and firmness, which is exactly why supplements aimed at how you look are typically built around these two types.

There is human research behind this focus. In a controlled trial, women who took specific collagen peptides showed measurable improvements in skin elasticity and hydration compared with placebo (Proksch et al., 2014). The benefit was tied to consistent daily intake over several weeks, not a single dose.

Nails are part of the same story. In a study of participants with brittle nails, daily supplementation with specific bioactive collagen peptides was associated with improved nail growth and a reduction in brittleness over the study period (Hexsel et al., 2017). Together, these point to the skin-and-nails category as the area where Type I and III collagen is most studied for appearance.

If your goal is joints rather than appearance, the relevant type changes. Type II is the collagen that makes up cartilage, the cushioning tissue at the ends of bones, so it is the type most associated with joint and cartilage support.

The research here uses collagen for joint comfort. In a 24-week study of athletes with activity-related joint pain, those taking collagen hydrolysate reported improvements in joint comfort compared with placebo (Clark et al., 2008). It is a reminder that collagen for joints is a distinct goal from collagen for skin.

One practical note: Type II is often used differently than the Type I and III peptides found in skin products, including at lower doses. So if joints are your priority, the type and the way it is used both differ from a skin-and-nails collagen. Matching the type to the goal matters more than the total amount.

Collagen peptides are generally well tolerated as a daily food supplement, but a few sensible points are worth keeping in mind:

• Match the type to the goal. Type I and III for skin, hair, nails, and structure; Type II for cartilage-specific goals. Collecting every type is not necessary.
• Check the source. Bovine and marine collagen are both rich in Type I and III, so the source on the label tells you a lot about the types inside.
• If you have a medical condition or allergy, or you are pregnant or breastfeeding, talk to your healthcare provider before starting.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Questions? Contact the Dr. White team.

Which collagen type you actually need comes down to your goal, not to chasing every variety. For skin, hair, nails, and structural support, the answer is Type I and III, the types with human research behind skin elasticity, hydration, and nail strength. For joint and cartilage-specific support, the answer is Type II, the collagen that makes up cartilage and is used in a different way.

Dr. White Collagen Gummies are built around Type I and III for skin and structural support, in a lime gummy you will actually take every day. Because collagen works on a consistency timescale, the format you stick with is the one that delivers, which is the entire case for a gummy over a scoop you skip.

Skin and Nails

Joints