Answer:

enzymes

Answer	Crossword Clue
ENZYMES	Agents of biochemical change
ENZYMES	Organic catalysts
ENZYMES	Pepsin and trypsin

ENZYMES	Digestion aids
ENZYMES	Catalytic proteins
ENZYMES	Food processors
ENZYMES	Pepsin is one.
ENZYMES	Catalysts.
ENZYMES	Catalyzing substances.
ENZYMES	Organic substances.
ENZYMES	Pepsin, trypsin, etc.

ENZYMES	They cause breakdowns
ENZYMES	Pepsin and rennin, for two
ENZYMES	Causes of breakdowns
ENZYMES	They help digest food
ENZYMES	Some juices
ENZYMES	Pepsin and lipase
ENZYMES	Pepsins, e.g.
ENZYMES	Renin, and others