Collagen supplements are so expensive I'm looking at some cheaper alternatives.
Would I get some benefits if I were to start including the following in my diet
Rowntrees jelly
Tinned sardines (bones and scales)
Bone broth soup?
Start eating the skin on fish, chicken etc.
Why are people paying megabucks for collagen supplements when things like jelly and tinned sardines cost peanuts?
Are we being taken for mugs?
Or am I missing some thing? 
Ps. Tinned sardines are low mercury content.