I think risk assessment is a complicated process. It is not always easy to explain, but I will try to do that very briefly.
I think we mentioned three concepts that are always taken into account.
First, we look at the properties of a material. These are things like the shape. What is the form? What is the solubility? How is the substance going to behave on the basis of its chemical characteristics? Understanding that would give you an idea of how it is going to behave in the environment and in the human body.
We then look at inherent hazards. What is the potential that this substance may cause an adverse effect?
Then we take a look at exposure. When you look at exposure, you look at what the route of exposure is. Are you being exposed by ingestion? Are you being exposed by a topical application? Are you being exposed in the air? You look at what conditions those exposures happen under. You look at cumulative exposure.
In our products, we know that consumers use multiple products every day, so it is important to look not just at the substance in one product, but the substances in a multitude of products so that you understand the cumulative impact that has.
You look at sensitive populations. Are there groups that are going to be specifically exposed that you are going to want to make sure you adequately protect for?
Risk assessment, by its very nature, is very conservative. It uses worst-case assumptions. It allows for uncertainty to be addressed in terms of adding safety factors or uncertainty factors so that you can be sure that the outcome of a risk assessment is going to be conservative and adequately protective of even the most sensitive population.