Pretty interesting find. (Not completely sure if this is the right community for this- let me know if you know where else it would be a good fit!)
Pretty interesting find. (Not completely sure if this is the right community for this- let me know if you know where else it would be a good fit!)
Had to look this up yesterday as I had thought the same. In rodents anyway, the orange color is from amino acids, not the iron in their teeth.
Where did you find a source that it was from amino acids?
This one says the orange is from the iron
Wikipedia’s citationed summary confirms it is orange due to the the iron