Question:
Collagan made from kosher fish scales or skin. Can it be eaten? What if it's from a non kosher fish or non kosher beef bones?
Answer:
Collagan made from kosher fish scales or skin is permitted if it has a hechsher but if it's from a non kosher fish or non kosher beef bones it is forbidden.
Sources:
https://oukosher.org/product-search/
