* Tested dermatologically: This means that the product has been tested by dermatologists to ensure it is safe and gentle for skin. It emphasizes the specific type of testing.
* Tested: This is a more general statement and doesn't specify the type of testing. It could mean that the product has been tested for safety, efficacy, or other factors.
The best option to use depends on the context and what you want to emphasize.
Example:
* "This product is tested dermatologically for mildness and safety." (This emphasizes the specific type of testing.)
* "This product has been thoroughly tested." (This is a more general statement.)