Is softening hair harmful to the heart?

There is no direct evidence that hair softening itself is harmful to the heart.

Chemicals used in hair softening may cause irritation and damage to hair and scalp, leading to itching, hair dryness, breakage, etc., and ammonia, sulfur dioxide, etc. in hair styling agents may also cause irritation and damage to hair and scalp. However, these chemicals usually stay on hair and scalp and do not enter the body, so they do not directly affect the heart. Because everyone's body and health condition are different, the reaction to chemicals will also vary. If you are worried about the effect of softening hair, it is recommended to consult a professional doctor.