Sorry in a rush here today: Ill be quick.
I would never use collagen as a protein source. Separate the two. Either EAA's or a good isolate for muscle / collagen for joints/connective tissue.
The two you should really look into are
1) UC II (undenatured collagen type II usually from chicken sternum) which has been shown to have great benefit at about 40mg a day (capsulized)
2) Hydrolyzed collagen that usually comes from beef...the minimum and i mean minimum seen in studies to have benefit there is 10 grams a day so make 10 grams a day the least amount you use
My opinion is a usage of both (UC II and either hydro collagen or a multi collagen)
Quick Refresher:
Type I : Type I helps to form our skin, bones, tendons, corneas, blood vessel walls and other connective tissues. Type I or type 1 collagen is the strongest type of collagen. If you're looking for a collagen for supporting skin health, type 1 is a top choice since it's literally a building block of the skin. Type 1 collagen, for example, can be found in supplements featuring bovine or fish collagen. These also generally feature certain amino acids, including proline, glycine and hydroxyproline. Fish or marine collagen is generally easily absorbable by the body. Egg collagen, which is located in the whites and shells of eggs, contains mostly type I collagen, but also can feature other types of collagen, including collagen type X.
Type II : is the major collagen found in cartilage. Cartilage is connective tissue that protects the ends of long bones at the joints. It's also a structural component of the ear, the nose, the bronchial tubes, the rib cage and more. This is mainly chicken collagen. Chicken collagen also inherently features chondroitin sulfate and glucosamine sulfate, which are both popular for supporting healthy joints.
Type III: Type III is a fibrillar collagen and is a major component of our skin and organs. In the body, type collagen is often found in the same locations as type l. Like type l, it is often in supplements designed to support healthy skin. Bovine collagen, which is derived from the muscles, bones and skin of cows is another collagen supplement option that features mainly types l and lll collagen. These are two of the most abundant types of collagen in the human body.
Type V and Type X: Type V collagen 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. Type V collagen also functions to create the cells of a pregnant women's placenta, which is the organ that attaches to the lining of the womb. Type V collagen also helps to form cell surfaces and hair. Collagen type X (which is generally found in eggshell membrane collagen) is a protein typically present in normal joint cartilage. Overall, type X collagen is described as a “network-forming collagen.”