From Suppliers to Customers: Why is it Important to Maintain End-to-End Transparency?

With the constant access to information online, cosmetics customers are now hyper-aware of ingredients, formulation, and sourcing.
The demand for effective ingredients paired with the need for this to be sustainability sourced means that transparency from supplier through to customer is of increasingly importance in maintaining perceptions of product quality
How to achieve transparency within your business?
How to best communicate this with the customer?