about Chitosan
Summary
Chitosan is used primarily as a plant growth enhancer, and as a substance that boosts the ability of plants to defend against fungal infections. It is approved for use outdoors and indoors on many plants grown commercially and by consumers.
The active ingredient is found in the shells of crustaceans, such as lobsters, crabs, and shrimp, and in certain other organisms.
Given its low potential for toxicity and its abundance in the natural environment, chitosan is not expected to harm people, pets, wildlife, or the environment when used according to label directions.1
1. EPA web site information
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