Simplify the following text for a Grade 14 native English-speaking person.
Original: Alkaloids are produced by a large variety of organisms , including bacteria , fungi , plants , and animals and are part of the group of natural products ( also called secondary metabolites ) .
Simplified: Alkaloids are made by a large variety of organisms , such as bacteria , fungi , plants , and animals and are part of the group of natural products ( also called secondary metabolites ) .