No serious studies have shown that:
1-The mix of different types of collagen reduces their efficacy or benefits.
2-Type 1 and 3 must be taken separate from 2

However, different studies have found that:

Type I collagen is among the most abundant collagen found in the human body and forms collagen fibers.

Type III collagen frequently works in tandem with Type I collagen. Collagen Type I and III are the major components of skin, hair, nails, muscles, tendons, ligaments, bones, gums, teeth, eyes and blood vessels. Together, Types I and III collagen constitute more than 90 percent of the collagen found in the body. 

Type II is a highly popular and researched collagen. It’s also a major component of joint cartilage. 

Type X is a protein generally associated with chondrocytes of avian. Collagen Type X is present in normal joint cartilage. 

Type V is one of the minor collagen components, forming interstitial collagen fibers (along with Type I collagen) and plays a significant role in regulating the development of collagen fibers of connective tissue. Type V collagen co-exists with Type II collagen in joint cartilage, while supporting healthy collagen fibers of Type II collagen.

Many people have been using our products as directed and have experienced great results.

You can also click the following link to learn more about How Much Collagen Do We Really Need?