Maximum Percentage of Total Active Ingredients in Formulation

There is no fixed maximum percentage for the total amount of active ingredients in a formulation.

The maximum permissible percentage for each active ingredient varies greatly depending on:

1. Type of Active Ingredient: Each active ingredient has different properties, optimal concentrations, and usage limitations.
2. Recommended Maximum Usage Rate: Manufacturers of active ingredients typically provide recommended maximum usage rates that are safe and effective.
3. Regulatory Requirements: Authorities like the FDA or local regulatory bodies may have specific requirements for certain active ingredients in different product types.
4. Product Type: Leave-on products may have different limitations compared to wash-off products.
5. Safety and Irritation: Using multiple active ingredients together at high concentrations can increase the risk of irritation or other side effects.

Therefore, instead of a single maximum total percentage for all active ingredients, it is crucial to check the recommended maximum usage rate for each individual active ingredient you intend to use in your formulation and adhere strictly to those recommendations, as well as considering compatibility and safety when combining them with other ingredients in the formula.