Antibiotics: Antibiotics are secondary metabolites produced by microorganisms. These compounds, not directly involved in growth or reproduction, are synthesized by microorganisms for survival.
Vitamins: Vitamins are essential nutrients for growth and metabolism, typically classified as primary metabolites.
Alcohol: Alcohol is a primary metabolite produced during fermentation.
Acids: Acids are primary metabolites, generally resulting from cellular respiration and other metabolic processes.