Possible Clues:

• E.g. pepsin
• Biochemical catalyst produced in the body
• Pepsin is one
• Frenzy merely shows one used to get a reaction
• Catalyst unknown in Yemen, sadly
• Pancreas product
• Biochemical catalyst unknown in parts of Yemen
• It'll increase reactions in a frenzy, merely
• Catalyst in some detergents
• Biochemical protein