This earth is filled with so many poisonous materials, most of which are affecting our health and our surroundings as humans. Toxin and toxicant are poisonous or toxic substances. While both could be ignorantly concluded to be the same, their differences lie in their mode of production i.e., how they are produced and what are the things producing them. Toxins are harmful, poisonous, or toxic substances that are produced by the biological processes in organisms. In other words, toxins are poisonous substances from the living cells of organisms.
For example, dangerous animals like snakes have toxic substances in them, which they use to defend themselves. Toxicants, on the other hand, are toxic or poisonous substances that are not produced from the biological processes of living organisms. Toxicants are manmade chemicals i.e., they are not produced from natural processes like toxins, but they can be powerful at the same level as toxins.