What are the safe and easy-to-use hair dyes on the market?

When choosing hair dye, the following factors need to be considered:

1. Ingredients: Choose a hair dye that contains natural ingredients or a low-ammonia formula. Avoid products containing strong chemicals such as ammonia, peroxide, or paraphenylenediamine.

2. Brand reputation: Choose a brand with high visibility and good reputation. These brands typically invest significant resources in research and development to ensure the safety and quality of their products.

3. User Reviews: Before purchasing hair dye, check out reviews and feedback from other users. This will help you understand a product's effects and possible side effects.

4. Type of hair dye: Choose the appropriate type of hair dye according to the effect you want.