Nutrition information on collagen extracted from chicken feet?

Question

I cant find anything on the web

I just found the nutrition facts on chicken feet, not the collagen extracted from it.

Thanks

Answer 1

that is sick

Answer 2

WOW !

Chicken feet are simply OFFAL, aka discarded animal carcass !

They can turn a buck from THAT TOO ?. Like lah-dee-dah pricey cosmetic collagen ?

What's next ? excrement and body parts as animal feed ?

Never mind. Been there, done that.

Answer 3

Chicken feet are low value by-product of poultry meat industry. The components of chicken foot, skin tendon and cartilage, possess high content of collagen. Study of the extraction and characteristics of collagen from chicken feet could lead to higher utilization of this by-product. We aimed to study the pre-treatment methods for collagen extraction from chicken feet and to investigate some characteristics of the extracted collagen. Broiler feet were ground, washed and defatted. Collagen was then extracted with acetic acid at 4oC. The extract was filtered and the acid solubilized collagen (ASC) was separated from the filtrate by salting-out. The acid insoluble part was subjected to limited proteolysis by pepsin, filtered and salted-out to obtain pepsin solubilized collagen (PSC). To study pre-treatment methods, the defatted sample was either soaked in NaOH or in flavozyme before extraction by acetic acid. After dialysis and freeze-drying, the ASC and PSC were characterized for their amino acid composition, thermal transition, and molecular weight profile by HPLC, DSC and SDS-PAGE, respectively. The yields of ASC and PSC extracted from chicken feet were 1.3% and 11.4% dry weight, respectively. The alkaline and enzyme pre-treatments increased the yield of ASC by 2.5 and 9 times, respectively. Electrophoregram showed that collagen from chicken feet was type one. No difference between peptide pattern of ASC from alkaline pretreated and non-pretreated sample while slight decrease of alpha-chain size of enzyme pretreated ASC and PSC were observed. The DSC results indicated high Tm (42o C) and onset temperature (40o C) of PSC and ASC from both non-pretreated and pretreated samples. Our results show that properly treating chicken feet with protease can increase the yield of ASC for at least 9 times without altering its major characteristics. The high transition temperature indicates high potential use of chicken feet as an alternative source of collagen for many industries.